CN203057070U - Oscillator with low-voltage low-power circuit structure - Google Patents

The utility model relates to an oscillator with a low-voltage low-power circuit structure. The oscillator comprises an input sub-circuit, a starting control circuit, a bias circuit, a capacitor set, a high speed converting circuit, a shaping output circuit and an S trigger, wherein the output end of the input sub-circuit is electrically connected with the starting control circuit, the output end of the starting control circuit is respectively connected with the bias circuit and the high speed converting circuit, the starting control circuit and the high speed converting circuit are connected through the capacitor set, the high speed converting circuit is connected with the RS trigger through the shaping output circuit, and the RS trigger is connected with the bias circuit. The oscillator with a low-voltage low-power circuit structure charges a capacitor through a bias current source circuit irrelative to voltage and temperature and combines rapid switching of a high speed converter to generate a system clock, thereby realizing low-voltage operation and extremely low power consumption.

A kind of oscillator with low-voltage and low-power dissipation circuit structure

Technical field

The utility model relates to the field of integrated circuit, especially a kind of oscillator with low-voltage and low-power dissipation circuit structure.

Background technology

The oscillator of low-voltage and low-power dissipation refers to work under the voltage about 2.5V, and power consumption is below 5 μ A.Oscillator almost has use in every money integrated circuit, it is as the local oscillator clock of system, the various time relationships that the generation system needs.General built-in oscillator is mostly worked under 2.5 ~ 5V power supply, and power consumption is about 0.1mA.

The power consumption of reduction system has become the target that electronic product, particularly portable equipment are constantly pursued.Oscillator is one of main consumed energy in system.

The low-power consumption of using in view of product and the consideration of product cost: a kind of oscillator circuit structure of low-voltage and low-power dissipation becomes the demand of design of electronic products.

Summary of the invention

The technical problems to be solved in the utility model is: in order to overcome the above-mentioned middle problem that exists, provide a kind of oscillator with low-voltage and low-power dissipation circuit structure, it can realize working under the low pressure, and power consumption is extremely low.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of oscillator with low-voltage and low-power dissipation circuit structure, comprise the input subcircuits, start control circuit, biasing circuit, capacitance group, high-speed transitions circuit and shaping output circuit and rest-set flip-flop, described input subcircuits output is electrically connected with the startup control circuit, starting the control circuit output is connected with the high-speed transitions circuit with biasing circuit respectively, start between control circuit and the high-speed transitions circuit and be electrically connected by capacitance group, the high-speed transitions circuit is connected with rest-set flip-flop by the shaping output circuit, and rest-set flip-flop is connected with biasing circuit.

In order to produce frequency of oscillation fast, described high-speed transitions circuit comprises first resistance, second resistance, first triode and second triode and the 3rd triode, biasing circuit is connected with the base stage of first triode and the base stage of second triode respectively, starting control circuit is connected with the base stage of first triode and the base stage of second triode respectively, described first resistance is connected with the collector electrode of first triode, second resistance is connected with the collector electrode of second triode, the collector electrode of the 3rd triode is connected with the emitter of first triode and the emitter of second triode respectively, and the collector electrode of the collector electrode of first triode and second triode is connected with the shaping output circuit respectively.

Described capacitance group comprises first electric capacity and second electric capacity, and first electric capacity is connected with the base stage of first triode, and second electric capacity is connected with the base stage of second triode.

The beneficial effects of the utility model are: described a kind of oscillator with low-voltage and low-power dissipation circuit structure, employing is by charging to electric capacity with the irrelevant bias current source circuit of voltage, temperature, and the quick switching in conjunction with high-speed converters produces system clock, realize working under the low pressure, power consumption is extremely low.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a kind of overall structure block diagram with oscillator of low-voltage and low-power dissipation circuit structure described in the utility model.

Accompanying drawing acceptance of the bid keep the score state as follows: 1, input subcircuits, 2, start control circuit, 3, biasing circuit, 4, capacitance group, C1, first electric capacity, C2, second electric capacity, 5, high-speed transitions circuit, R1, first resistance, R2, second resistance, Q1, first triode, Q2, second triode, Q3, the 3rd triode, 6, the shaping output circuit, 7, rest-set flip-flop.

Embodiment

By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.

A kind of oscillator with low-voltage and low-power dissipation circuit structure as shown in Figure 1, comprise input subcircuits 1, start control circuit 2, biasing circuit 3, capacitance group 4, high-speed transitions circuit 5 and shaping output circuit 6 and rest-set flip-flop 7, input subcircuits 1 output is electrically connected with startup control circuit 2, high-speed transitions circuit 5 comprises first resistance R 1, second resistance R 2, the first triode Q1 and the second triode Q2 and the 3rd triode Q3, biasing circuit 3 is connected with the base stage of the first triode Q1 and the base stage of the second triode Q2 respectively, starting control circuit 2 is connected with the base stage of the first triode Q1 and the base stage of the second triode Q2 respectively, first resistance R 1 is connected with the collector electrode of the first triode Q1, second resistance R 2 is connected with the collector electrode of the second triode Q2, the collector electrode of the 3rd triode Q3 is connected with the emitter of the first triode Q1 and the emitter of the second triode Q2 respectively, the collector electrode of the collector electrode of the first triode Q1 and the second triode Q2 is connected with shaping output circuit 6 respectively, shaping output circuit 6 is connected with rest-set flip-flop 7, capacitance group 4 comprises first capacitor C 1 and second capacitor C 2, first capacitor C 1 is connected with the base stage of the first triode Q1, and second capacitor C 2 is connected with the base stage of the second triode Q2.

A kind of circuit start process with oscillator of low-voltage and low-power dissipation circuit structure of the present utility model: it is initial to power on, oscillator cuts out, begun to start by power-on reset signal CE control generator, biasing circuit 3 gives first capacitor C 1 charging, produce triangular signal 1,2, the first triode Q1 opens and closes by triangular signal 1 control, and the first triode Q1 is from the collector electrode output signal, through shaping output circuit 6 output signals, trigger rest-set flip-flop 7 circuit output signals and frequency of oscillation OSCO; The signal controlling biasing circuit 3 of output gives second capacitor C 2 chargings, give first capacitor C 1 discharge simultaneously, produce triangular signal 1,2, controlling the second triode Q2 by triangular signal opens and closes, the second triode Q2 is from the collector electrode output signal, through shaping output circuit 6 output signals, trigger rest-set flip-flop 7 circuit output signals and frequency of oscillation OSCO; Output signal control biasing circuit 3 gives first capacitor C 1 charging, gives second capacitor C 2 discharges simultaneously, system's operation that goes round and begins again.

Be enlightenment with above-mentioned foundation desirable embodiment of the present utility model, by above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this utility model technological thought.The technical scope of this utility model is not limited to the content on the specification, must determine its technical scope according to the claim scope.