CN108351657B - Voltage regulating circuit and circuit voltage regulating method - Google Patents

The embodiment of the invention provides a voltage regulating circuit and a circuit voltage regulating method, relating to the field of integrated circuits, wherein the voltage regulating circuit comprises: the circuit comprises a first rectifying unit (1), a second rectifying unit (2), a signal control module (3), a switch group (4) and a load (5); the first rectifying unit (1) receives a power supply voltage, generates a first voltage based on the power supply voltage, and outputs the first voltage to the second rectifying unit (2); the second rectifying unit (2) generates a second voltage based on the first voltage and outputs the second voltage to the load (5) and the signal control module (3) respectively; the signal control module (3) generates a switching signal based on the second voltage and outputs the switching signal to the switch group (4) so as to control charging and discharging of equivalent capacitors of switches in the switch group (4), thereby adjusting the second voltage. By adjusting the second voltage input to the load (5), the voltage limit interval is reduced and the loss of the integrated circuit is reduced.

Voltage regulating circuit and circuit voltage regulating method

Technical Field

The invention relates to the field of integrated circuits, in particular to a voltage regulating circuit and a circuit voltage regulating method.

Background

With the development of semiconductor technology, the application range of integrated circuits is wider and wider. Because an integrated circuit is usually used with uncertainty, the uncertainty refers to uncertainty caused by changes of various factors influencing the normal operation of the integrated circuit, such as uncertainty caused by temperature changes, uncertainty caused by aging of internal components of the integrated circuit, and the like. Furthermore, the uncertainty of the integrated circuit often causes many disadvantages to the integrated circuit, for example, the uncertainty of the integrated circuit may cause the working voltage in the integrated circuit to fluctuate, which may cause an error in the working process of the integrated circuit, and therefore, in order to ensure that the integrated circuit can normally work under the uncertainty, the working voltage in the integrated circuit needs to be adjusted by the voltage adjusting circuit.

At present, a method for regulating a working voltage in an integrated circuit may include a method for regulating a voltage using a linear regulator, wherein when the voltage is regulated using the linear regulator, the linear regulator may be disposed inside the integrated circuit, and the linear regulator is disposed in series with a load inside the integrated circuit.

In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:

the load of the linear voltage regulator arranged in the integrated circuit and the supply voltage of the load are constant for the same integrated circuit, and the uncertainty of the integrated circuit can cause the required working voltage in the integrated circuit to change according to the fluctuation degree of the uncertainty. Therefore, in order to meet the power supply requirement of the load, the input power supply voltage is generally required to be higher, that is, when the integrated circuit is designed, a higher voltage limit interval is generally set on the basis of the power supply voltage for normal operation of the integrated circuit, and the voltage limit interval can realize the adjustment of the power supply voltage of the integrated circuit. However, since the power consumption of the circuit is generally increased as the voltage is increased, the power consumption of the circuit is generally increased in the voltage limit section.

Disclosure of Invention

In order to reduce power consumption in a circuit, the embodiment of the invention provides a voltage regulating circuit and a voltage regulating method of the circuit. The technical scheme is as follows:

in a first aspect, a voltage regulating circuit is provided, which includes a first rectifying unit, a second rectifying unit, a signal control module, a switch group and a load;

the first rectifying unit receives a power supply voltage, generates a first voltage based on the power supply voltage, and outputs the first voltage to the second rectifying unit;

the second rectifying unit generates a second voltage based on the first voltage, outputs the second voltage to the load to provide a working voltage for the load, and outputs the second output voltage to the signal control module;

the signal control module generates a switching signal based on the second voltage and outputs the switching signal to the switch group to control charging and discharging of an equivalent capacitor of a switch in the switch group, so that the second voltage is adjusted.

Because supply voltage passes through first rectifier cell and second rectifier cell after, this second rectifier cell can export the second voltage to signal control module, consequently, when this signal control module received the second voltage of this second rectifier cell output, can generate switching signal based on this second voltage, and export this switching signal to the switch block, charge and discharge the equivalent capacitance of switch in the switch block through control, thereby adjust the second voltage of input to the load, reduce the voltage restriction interval, thereby reduce integrated circuit's consumption, improve the efficiency of regulator circuit pressure regulating.

The input end of the first rectifying unit is connected with an external power supply, and the external power supply is used for providing power supply voltage for the voltage regulating circuit; the output end of the first rectifying unit is connected with the first end of the switch group, and the output end of the first rectifying unit is also connected with the input end of the second rectifying unit; the output end of the second rectifying unit is connected with the input end of the load, the output end of the second rectifying unit is also connected with the input end of the signal control module, and the output end of the load is grounded; the output end of the signal control module is connected with the second end of the switch group.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the signal control module includes a voltage sensor and a switch control unit;

the voltage sensor receives a second voltage output by the second rectifying unit, generates a control signal based on the second voltage, and outputs the control signal to the switch control unit;

the switch control unit generates the switch signal based on the control signal, and outputs the switch signal to the switch group to control charging and discharging of equivalent capacitors of switches in the switch group, so that the second voltage is adjusted.

The input end of the voltage sensor is connected with the output end of the second rectifying unit, the output end of the voltage sensor is connected with the input end of the switch control unit, and the output end of the switch control unit is connected with the second end of the switch group.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the first rectifying unit includes a first diode or a first transistor.

With reference to the first aspect, in another possible implementation manner of the first aspect, the first rectifying unit includes a first diode;

the first diode receives the supply voltage and outputs the first voltage to the switch group and the second rectifying unit respectively.

The anode of the first diode is connected with the external power supply, the cathode of the first diode is connected with the first end of the switch group, and the cathode of the first diode is also connected with the input end of the second rectifying unit.

With reference to the first aspect, in another possible implementation manner of the first aspect, the first rectifying unit includes a first transistor;

the first transistor receives the power supply voltage and outputs the first voltage to the switch group and the second rectifying unit respectively.

The grid electrode of the first transistor is connected with the drain electrode of the first transistor, the grid electrode of the first transistor and the drain electrode of the first transistor are further respectively connected with the external power supply, the source electrode of the first transistor is connected with the first end of the switch group, and the source electrode of the first transistor is further connected with the input end of the second rectifying unit.

With reference to the first aspect or the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the second rectifying unit includes a second diode or a second transistor.

With reference to the first aspect or the first possible implementation manner of the first aspect, in another possible implementation manner of the first aspect, the second rectifying unit includes a second diode;

the second diode receives the first voltage output by the first rectifying unit and outputs the second voltage to the load and the voltage sensor respectively.

The anode of the second diode is connected with the output end of the first rectifying unit, the anode of the second diode is also connected with the first end of the switch group, and the cathode of the second diode is respectively connected with the input end of the load and the input end of the voltage sensor.

With reference to the first aspect or the first possible implementation manner of the first aspect, in another possible implementation manner of the first aspect, the second rectifying unit includes a second transistor;

the second transistor receives the first voltage output by the first rectifying unit and outputs the second voltage to the load and the voltage sensor.

The grid electrode of the second transistor is connected with the drain electrode of the second transistor, the grid electrode of the second transistor and the drain electrode of the second transistor are further respectively connected with the output end of the first rectifying unit, the grid electrode of the second transistor and the drain electrode of the second transistor are further respectively connected with the first end of the switch group, and the source electrode of the second transistor is respectively connected with the input end of the load and the input end of the voltage sensor.

With reference to any one of the first possible implementation manner of the first aspect to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the switch control unit includes a signal generator and at least one logic gate circuit;

the signal generator generates a pulse signal and outputs the pulse signal to the at least one logic gate circuit, which generates the switching signal based on the pulse signal and the control signal.

Wherein, the output end of the signal generator is respectively connected with the first input end of the at least one logic gate circuit; the second input end of the at least one logic gate circuit is respectively connected with the output end of the voltage sensor, and the output end of the at least one logic gate circuit is connected with the second end of the switch group.

With reference to any one of the first to fourth possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, the switch group includes at least one third transistor;

the switch signal controls the third transistor to be turned on or off so as to control charging and discharging of an equivalent capacitor of the third transistor.

The source of the at least one third transistor is connected to the drain of the at least one third transistor, the gate of the at least one third transistor is connected to the output terminal of the switch control unit, and the source of the at least one third transistor and the drain of the at least one third transistor are also connected to the input terminal of the second rectifying unit, respectively.

In a second aspect, a circuit voltage regulation method is provided, which is applied to any one of the above first to fourth possible implementation manners of the first aspect, and is characterized by including:

when the power supply voltage is switched on, the power supply voltage is rectified through the first rectifying unit to obtain a first voltage;

rectifying the first voltage through the second rectifying unit to obtain a second voltage;

when the second voltage is received through the signal control module, generating the switching signal through the signal control module based on the second voltage;

and based on the switch signal, controlling the charging and discharging of the equivalent capacitance of the switch in the switch group through the signal control module so as to regulate the second voltage.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the signal control module includes a voltage sensor and a switch control unit;

the generating, by the signal control module, the switching signal based on the second voltage includes:

generating a control signal by the voltage sensor based on the second voltage;

generating, by the switch control unit, the switching signal based on the control signal.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the switch control unit includes a signal generator and at least one logic gate circuit;

the generating, by the switch control unit, the switching signal based on the control signal includes:

generating a pulse signal by the signal generator;

generating the switching signal based on the pulse signal and the control signal;

correspondingly, the controlling, by the signal control module, the charging and discharging of the equivalent capacitance of the switch in the switch group based on the switch signal to adjust the second voltage includes:

based on the switching signal, controlling charging and discharging of equivalent capacitances of switches in the switch group by the at least one logic gate circuit to regulate the second voltage.

With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the switch set includes at least one third transistor;

the controlling, by the at least one logic gate circuit, charging and discharging an equivalent capacitance of a switch in the switch group based on the switch signal to regulate the second voltage includes:

when the first level signal is generated by the at least one logic gate circuit based on the pulse signal and the control signal, turning on the at least one third transistor based on the first level signal to charge an equivalent capacitance of the at least one third transistor;

when the second level signal is generated by the at least one logic gate circuit based on the pulse signal and the control signal, the at least one third transistor is turned off based on the second level signal to discharge through an equivalent capacitance of the at least one third transistor, thereby adjusting the second voltage.

The technical scheme provided by the embodiment of the invention has the beneficial effects that: in the embodiment of the present invention, after the power supply voltage passes through the first rectifying unit and the second rectifying unit, the second rectifying unit may output the second voltage to the signal control module, so that when the signal control module receives the second voltage output by the second rectifying unit, the signal control module may generate a switching signal based on the second voltage, and output the switching signal to the switch group, so as to adjust the voltage input to the load by controlling the charging and discharging of the equivalent capacitor of the switch in the switch group, thereby reducing the voltage limit interval, reducing the power consumption of the integrated circuit, and improving the efficiency of voltage regulation of the voltage regulating circuit.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first voltage regulating circuit according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a second voltage regulating circuit according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a third voltage regulating circuit according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a fourth voltage regulating circuit according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a fifth voltage regulating circuit according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a sixth voltage regulating circuit according to an embodiment of the present invention.

Fig. 7 is a flowchart of a circuit voltage regulating method according to an embodiment of the present invention.

Fig. 8 is a flowchart of another voltage regulating method for a circuit according to an embodiment of the present invention.

Reference numerals:

1: a first rectifying unit; 2: a second rectifying unit; 3: a signal control module; 4: a switch group;

5: a load; vdd: connecting an external power supply;

11: input terminal of first rectifying unit, 12: an output end of the first rectifying unit;

21: input terminal of second rectifying unit, 22: an output end of the second rectifying unit;

31: input of signal control module, 32: an output end of the signal control module;

41: first end of switch group, 42: a second terminal of the switch block;

51; input terminal of load, 52: an output terminal of the load;

33: voltage sensor, 34: a switch control unit;

331: input of voltage sensor, 332: output of voltage sensor, 341: input terminal of switch control unit, 342: an output terminal of the switch control unit;

D₁: first diode, D₂: a second diode;

Q₁: a first transistor, Q₂: a second transistor;

s₁: source of the first transistor, d₁: drain of the first transistor, g₁: gate of the first transistor, s₂: source of the second transistor, d₂: drain of the second transistor, g₂: a gate of the second transistor;

343: signal generator, 344: a logic gate circuit;

a: output of signal generator, b: first input of logic gate circuit, c: second input of logic gate circuit, d: an output end of the logic gate circuit;

Q₃: a third transistor;

S₃: source of the third transistor, d₃: drain of the third transistor, g₃: a gate of the third transistor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In addition, in the embodiment of the present invention, since the integrated circuit may include a plurality of different loads at the same time, when adjusting the voltage of the load, each of the plurality of different loads may correspond to one signal control module, or each of the plurality of different loads may correspond to one signal control module, which is not limited in this embodiment of the present invention.

It should be noted that, because the voltages required by the multiple different loads may be the same or different, when each of the multiple different loads corresponds to one signal control module, the voltage may be adjusted according to the voltage required by the multiple different loads, so as to improve the accuracy of voltage adjustment.

It should be further noted that the preset voltage may be set according to different application scenarios, which is not specifically limited in the embodiment of the present invention.

It should be noted that, since the first diode D₁Has a rectifying function, so that when the external power supply Vdd is connected, the first diode D₁The supply voltage provided by the external power supply Vdd can be rectified to obtain the first voltage.

It should be noted that, due to the second diode D₂Having a rectifying function, so that when the second diode D is used₂When receiving the first voltage, the second diode D₂The first voltage may be rectified to obtain a second voltage.

Referring to fig. 6, the switch set 4 may include at least one third transistor Q₃；

The switching signal controls the third transistor Q₃To control the third transistor Q to be turned on or off₃The equivalent capacitance of (a) to (b).

It should be noted that, under the conventional transistor process, since the equivalent capacitance of the transistor is determined by the equivalent capacitance between the gate and the source of the transistor and the equivalent capacitance between the gate and the drain of the transistor, the source of the transistor and the drain of the transistor are connected, and the equivalent capacitance between the gate and the drain is superimposed on the equivalent capacitance between the gate and the source, so as to increase the equivalent capacitance of the transistor, the at least one third transistor Q is used to perform the above-mentioned method₃Source s of₃And the at least one third transistor Q₃Drain electrode of (d)₃The at least one third transistor Q can be more easily obtained₃A larger equivalent capacitance value.

The first transistor Q according to the embodiment of the present invention₁A second transistor Q₂And a third transistor Q₃The transistor may be an NMOS (N-Mental-Oxide-Semiconductor) transistor, a PMOS (P-Mental-Oxide-Semiconductor) transistor, or a CMOS (complementary-Mental-Oxide-Semiconductor) transistor, or may be other transistors, which is not specifically limited in the embodiment of the present invention. In addition, the first transistor Q₁A second transistor Q₂And a third transistor Q₃May be the same kind of crystalThe transistor may be a different transistor, and the embodiment of the present invention is not limited thereto.

It should be noted that, since the third transistor Q is used₃The transistor can be any one of NMOS transistor, PMOS transistor or CMOS transistor, and the conduction or cut-off conditions of the NMOS transistor, PMOS transistor and CMOS transistor are different, so that the first level signals for conducting different transistors can be different, and the second level signals for cutting off different transistors can be different in the same way.

For example, when the third transistor Q₃When the transistor is an NMOS transistor, the third transistor Q is turned on₃The first level signal is high level signal, so that the third transistor Q₃The second level signal which is turned off is a low level signal; when the third transistor Q₃When the third transistor Q is a PMOS transistor₃The first level signal is turned on to be a low level signal, so that the third transistor Q is turned on₃The second level signal which is turned off is a high level signal; when the third transistor Q₃In the case of CMOS transistor, the third transistor Q is used₃The first level signal is high level signal, so that the third transistor Q₃The second level signal which is switched off is a low level signal.

In the embodiment of the present invention, since the input terminal of the first rectifying unit is connected to the external power supply, the output terminal of the first rectifying unit is connected to the input terminal of the second rectifying unit, and the output terminal of the second rectifying unit is connected to the input terminal of the voltage sensor, when the power supply voltage provided by the external power supply is turned on, the first rectifying unit may output the first voltage to the second rectifying unit based on the power supply voltage, and when the second rectifying unit receives the first voltage, the second rectifying unit may output the second voltage to the voltage sensor based on the first voltage, and the voltage sensor may generate the control signal based on the second voltage. The output end of the voltage sensor is connected with the input end of the switch control unit, the output end of the switch control unit is connected with the second end of the switch group, the first end of the switch group is connected with the input end of the second rectifying unit, and the output end of the second rectifying unit is also connected with the input end of the load, so that the voltage sensor can output the control signal to the switch control unit, the switch control unit can generate a switch signal based on the control signal and output the switch signal to the switch group, the charge or discharge of the switch group is controlled, and when the switch group discharges, the electric quantity released by the switch group can be input into the load after passing through the second rectifying unit, and the voltage input to the load is improved; when the voltage input to the load reaches a certain specified voltage, the control signal generated based on the specified voltage can control the switch group to charge so as to regulate the second voltage input to the load, thereby reducing the voltage limit interval and reducing the loss of the integrated circuit.

Fig. 7 is a flowchart of a voltage regulating method for a circuit according to an embodiment of the present invention, referring to fig. 7, the method is applied to a voltage regulating circuit, and the method includes:

step 701: when the power supply voltage is switched on, the first rectifying unit rectifies the power supply voltage to obtain the first voltage.

Step 702: and rectifying the first voltage through a second rectifying unit to obtain a second voltage.

Step 703: when the second voltage is received through the signal control module, the switching signal is generated through the signal control module based on the second voltage.

Step 704: based on the switch signal, the signal control module controls the charging and discharging of the equivalent capacitor of the switch in the switch group so as to adjust the second voltage.

In the embodiment of the invention, when the power supply voltage is switched on, the voltage regulating circuit receives the second voltage through the signal control module, and obtains the switching signal based on the second voltage, so that the charging and discharging of the equivalent capacitor of the switch in the switch group are controlled through the signal control module based on the switching signal to regulate the second voltage, thereby reducing the voltage limit interval and reducing the loss of the integrated circuit.

Optionally, the signal control module comprises a voltage sensor and a switch control unit;

generating the switching signal by the signal control module based on the second voltage, including:

generating a control signal by the voltage sensor based on the second voltage;

the switching signal is generated by the switching control unit based on the control signal.

Optionally, the switch control unit comprises a signal generator and at least one logic gate circuit;

generating a switching signal by the switching control unit based on the control signal, including:

generating a pulse signal by the signal generator;

generating the switching signal based on the pulse signal and the control signal;

correspondingly, based on the switch signal, the signal control module controls the charging and discharging of the equivalent capacitor of the switch in the switch group to adjust the second voltage, including:

based on the switching signal, the at least one logic gate circuit controls charging and discharging of equivalent capacitors of switches in the switch group to regulate the second voltage.

Optionally, the switch set comprises at least one third transistor;

based on the switching signal, controlling charging and discharging of equivalent capacitors of switches in the switch group through the at least one logic gate circuit to regulate the second voltage, comprising:

when the first level signal is generated by the at least one logic gate circuit based on the pulse signal and the control signal, turning on the at least one third transistor based on the first level signal to charge an equivalent capacitance of the at least one third transistor;

when the second level signal is generated by the at least one logic gate circuit based on the pulse signal and the control signal, the at least one third transistor is turned off based on the second level signal to discharge through an equivalent capacitance of the at least one third transistor, thereby adjusting the second voltage.

All the above optional technical solutions can be combined arbitrarily to form an optional embodiment of the present invention, which is not described in detail herein.

Fig. 8 is a flowchart of another voltage regulating method provided in an embodiment of the present invention, and referring to fig. 8, the method is applied to a voltage regulating circuit, and includes:

step 801: when the voltage regulating circuit is connected with the power supply voltage, the first rectifying unit is used for rectifying the power supply voltage provided by the external power supply to obtain a first voltage.

In an embodiment of the present invention, the first rectifying unit may include a first diode or a first transistor, and when the first rectifying unit includes the first diode, the diode has a rectifying function, so that when the supply voltage provided by the external power supply is switched on, the voltage regulating circuit may rectify the supply voltage provided by the external power supply through the first diode in the first rectifying unit, so as to obtain the first voltage.

Similarly, when the first rectifying unit includes the first transistor, the gate of the first transistor is connected to the drain of the first transistor, and then the first transistor is equivalent to an equivalent diode, so that when the external power supply is turned on, the first transistor in the first rectifying unit can also rectify the supply voltage provided by the external power supply, thereby obtaining the first voltage.

Step 802: the voltage regulating circuit carries out rectification processing on the first voltage through the second rectifying unit to obtain the second voltage.

In the embodiment of the present invention, the second rectifying unit may include a second diode or a second transistor, and when the second rectifying unit includes the second diode, since the diode has a rectifying function and the output terminal of the first rectifying unit is further connected to the input terminal of the second rectifying unit, the voltage regulating circuit may rectify the first voltage through the second diode in the second rectifying unit, so as to obtain the second voltage.

Similarly, when the second rectifying unit includes a second transistor, the gate of the second transistor is connected to the drain of the second transistor, and then the second transistor is equivalent to an equivalent diode, so that the voltage regulating circuit can also rectify the first voltage through the second transistor in the second rectifying unit, thereby obtaining the second voltage.

Step 803: when the voltage regulating circuit receives the second voltage through the signal control module, a switching signal is generated through the signal control module based on the second voltage.

The voltage regulating circuit can generate a control signal through the voltage sensor based on the second voltage because the signal control module comprises the voltage sensor and the switch control unit; based on the control signal, a switching signal is generated by a switching control unit.

Ideally, the second voltage supplied to the voltage sensor should be a fixed input value, and a fixed output value can be obtained when the voltage sensor senses the second voltage. However, due to the uncertainty of the integrated circuit, the second voltage may change, and thus the output of the voltage sensor may also change, and therefore, in order to determine whether the integrated circuit is affected by the uncertainty, the second voltage may be detected by the voltage sensor in the voltage regulator circuit.

It should be noted that, in the embodiment of the present invention, the voltage sensor may receive the second voltage and generate the control signal based on the second voltage, or receive a voltage difference between the second voltage and a preset voltage and generate the control signal based on the voltage difference, which is not specifically limited in this embodiment of the present invention.

It should be further noted that the preset voltage may be set according to different application scenarios, which is not specifically limited in the embodiment of the present invention.

The voltage sensor may generate one control signal based on the second voltage, or generate a plurality of control signals based on the second voltage, and a method for the voltage sensor to generate the control signal based on the second voltage may refer to related technologies, which is not specifically limited in the embodiment of the present invention.

Step 804: the voltage regulating circuit controls charging and discharging of an equivalent capacitor of a switch in the switch group through the signal control module based on the switch signal so as to regulate a second voltage input to the load.

Wherein, because the switch control unit comprises a signal generator and at least one logic gate circuit, the voltage regulating circuit can generate a pulse signal through the signal generator; generating a switching signal based on the pulse signal and the control signal; based on the switching signal, the at least one logic gate circuit controls charging and discharging of equivalent capacitors of switches in the switch group, thereby adjusting the second voltage.

It should be noted that the pulse signal is also used for generating the switching signal, and the pulse signal may be a periodic rectangular signal, a sawtooth signal, or the like, which is not particularly limited in the embodiment of the present invention.

In addition, since the voltage sensor may generate one control signal or a plurality of control signals based on the second voltage, when the voltage sensor generates one control signal, the voltage sensor may output the control signal to each of the at least one logic gate circuit; when the voltage sensor generates a plurality of control signals, the voltage sensor may output the plurality of control signals to the at least one logic gate circuit, respectively, if the number of output control signals is equal to the number of the at least one logic gate circuit, and the voltage sensor may output the plurality of control signals to the at least one logic gate circuit, respectively, and the same control signal may be output to the plurality of logic gate circuits, if the number of output control signals is smaller than the number of the at least one logic gate circuit. That is, when the voltage sensor generates a control signal, the control signals received by the at least one logic gate circuit are all the same; when the voltage sensor generates a plurality of control signals and the number of the plurality of control signals is equal to the number of the at least one logic gate circuit, the at least one logic gate circuit and the control signals may be in a one-to-one correspondence relationship; when the voltage sensor generates a plurality of control signals and the number of the plurality of control signals is smaller than the number of the at least one logic gate circuit, a one-to-many relationship may be between the control signals and the at least one logic gate circuit, which is not particularly limited in the embodiment of the present invention.

It should be further noted that the switching signal is used to determine the equivalent capacitance of the switch group for charging and discharging, and the switching signal includes a first level signal and a second level signal. The first level signal is used for conducting the switch group and controlling the equivalent capacitance of the switch group to charge, and the second level signal is used for switching off the switch group and controlling the equivalent capacitance of the switch group to discharge.

Since the switch group includes at least one third transistor, the voltage regulating circuit controls charging and discharging of the equivalent capacitance of the switch in the switch group through at least one logic gate circuit based on the switch signal, so as to regulate the second voltage, which may be: when a first level signal is generated by the at least one logic gate circuit based on the pulse signal and the control signal, turning on the at least one third transistor based on the first level signal to charge an equivalent capacitance of the at least one third transistor; when a second level signal is generated by the at least one logic gate circuit based on the pulse signal and the control signal, the at least one third transistor is turned off based on the second level signal to discharge through an equivalent capacitance of the at least one third transistor, thereby adjusting the second voltage.

It should be noted that, because the third transistor may be any one of an NMOS transistor, a PMOS transistor, or a CMOS transistor, and the on or off conditions of the NMOS transistor, the PMOS transistor, and the CMOS transistor are different, the first level signals for turning on different types of transistors may be different, and similarly, the second level signals for turning off different types of transistors may also be different.

For example, when the third transistor is an NMOS transistor, the first level signal that turns on the third transistor is a high level signal, and the second level signal that turns off the third transistor is a low level signal; when the third transistor is a PMOS transistor, the first level signal which enables the third transistor to be conducted is a low level signal, and the second level signal which enables the third transistor to be turned off is a high level signal; when the third transistor is a CMOS transistor, the first level signal that turns on the third transistor is a high level signal, and the second level signal that turns off the third transistor is a low level signal.

In addition, since the switch group may include at least one third transistor and the switch control unit may include at least one logic gate circuit, when the number of the third transistors included in the switch group is the same as the number of the switch control unit, the third transistors and the logic gate circuits are in one-to-one correspondence, and further, the third transistors included in the switch group may be controlled in one-to-one correspondence by the logic gate circuits included in the switch control unit. When the number of the third transistors included in the switch group is greater than the number of the logic gate circuits included in the switch control unit, the plurality of third transistors may be controlled by one logic gate circuit. That is, a one-to-one relationship may be between the logic gate circuit included in the switch control unit and the third transistor included in the switch group, or a one-to-many relationship may be included, which is not specifically limited in this embodiment of the present invention.

For example, when the switch group includes 4 third transistors, the 4 third transistors may be controlled by 4 logic gate circuits, or the 4 third transistors may be controlled by 2 logic gate circuits, where one logic gate circuit controls 2 third transistors, or 1 logic gate circuit controls 4 third transistors.

In addition, since the source of the at least one third transistor and the drain of the at least one third transistor are respectively connected to the input terminal of the second rectifying unit, and the output terminal of the second rectifying unit is also connected to the input terminal of the load, when the at least one third transistor in the switch group is discharging, the electric quantity released by the at least one third transistor may be input to the load after passing through the second rectifying unit, so as to increase the voltage input to the load, that is, the second voltage, when the second voltage reaches a specified voltage, the control signal generated by the voltage sensor based on the second voltage may be different, at this time, the at least one third transistor in the switch group may be controlled to be charged, and when the at least one third transistor Q is connected to the input terminal of the load₃When charging is performed, the at least one third transistor may not discharge power, and thus the voltage input to the load may be reduced, that is, the increased second voltage may be reduced, so as to complete adjustment of the second voltage input to the load.

Further, the computational formula for adjusting the second voltage input to the load may be expressed as:

to say thatIt is clear that V₀Representing a second voltage, V_ddIndicating the supply voltage, V, supplied by an external power supply_dropRepresenting the voltage drop of the first rectifying unit or the second rectifying unit, n representing the number of conduction of the third transistor in the switch group, C_gRepresenting the total capacitance, F, of a single third transistor_cRepresenting the frequency, R, of the pulse signal_loadRepresenting the resistance of the resistor in the load.

As can be seen from the above calculation formula, the second voltage can be changed by changing the number of the switch groups, and therefore, the number of the switch groups can be increased by connecting a plurality of switch groups in parallel, or the number of the switch groups can be increased by connecting a plurality of multi-stage rectifying units and the switch groups in series, thereby changing the second voltage. Alternatively, the second voltage may be changed by changing the frequency of the pulse signal, which is not particularly limited in the embodiment of the present invention.

It should be noted that, since the first rectifying unit may include a diode or a first transistor, and the second rectifying unit may include a second diode or a second transistor, taking the first rectifying unit as an example, when the first rectifying unit includes a first diode, the V is_dropRepresenting the voltage drop of the first diode. When the first rectifying unit comprises a first transistor, V is_dropRepresenting the threshold voltage of the first transistor.

In the embodiment of the invention, when the external power supply is switched on, the supply voltage provided by the external power supply passes through the first rectifying unit and the second rectifying unit to generate the second voltage, the voltage regulating circuit obtains a control signal based on the second voltage through the voltage sensor, and controls the switch group to be charged or discharged through the switch control unit based on the control signal, and when the switch group discharges, the released electric quantity can be input into the load after passing through the second rectifying unit, so that the voltage input into the load is improved; when the voltage input to the load reaches a certain specified voltage, the control signal generated based on the specified voltage can control the switch group to charge so as to regulate the second voltage input to the load, thereby reducing the voltage limit interval and reducing the loss of the integrated circuit.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.