CN202309679U - Integrated circuit with built-in oscillation frequency controller - Google Patents

The utility model discloses an integrated circuit with a built-in oscillation frequency controller, wherein inside the integrated circuit there is provided an oscillation frequency adjusting unit, and the oscillation frequency adjusting unit is connected with an internal oscillator of the integrated circuit. The oscillation frequency adjusting unit replaces the traditional externally-connected crystal oscillator, such that the oscillation frequency adjusting unit and the internal oscillator control the frequency needed by the integrated circuit in a manner of common resonance, to enable the integrated circuit to oscillate and begin to work, thereby reducing peripheral circuits and components and reducing production cost.

The integrated circuit of built-in control frequency of oscillation

Technical field

The utility model relates to a kind of integrated circuit that is applied in fields such as remote controller, clock and watch, refers specifically to a kind of integrated circuit of built-in control frequency of oscillation.

Background technology

Conventional use is at the integrated circuit in fields such as remote controller, clock and watch; All need outer setting crystal oscillator at this integrated circuit; By external crystal oscillator and the required frequency of the common resonance integrated circuit of IC interior oscillator, supply the integrated circuit vibration and generation work.The problem that the integrated circuit of said structure exists has; At the outer setting crystal oscillator of integrated circuit, make the various complicacy of peripheral circuit and components and parts, production cost is high; External crystal oscillator can cause small product size big, causes product direction little towards volume, Highgrade integration to develop.

The utility model content

The technical problem that the utility model will solve provide a kind ofly reduce peripheral circuit and components and parts, reduce production costs, the integrated circuit of built-in control frequency of oscillation that volume is little.

In order to solve the problems of the technologies described above, the utility model is taked following technical scheme.

A kind of integrated circuit of built-in control frequency of oscillation is characterized in that: be provided with the frequency of oscillation adjustment unit in the described integrated circuit, the frequency of oscillation adjustment unit connects the IC interior oscillator.

Described integrated circuit is remote controller or clock and watch integrated circuit; Remote controller or clock and watch integrated circuit comprise that keyboard scan input circuit, keyboard I/O scan circuit, coding circuit, sequential generate control circuit and output control circuit; Internal oscillator connects sequential and generates control circuit; Sequential generates control circuit and connects coding circuit, keyboard I/O scan circuit and output control circuit; The keyboard scan input circuit is connected coding circuit with keyboard I/O scan circuit, and coding circuit connects output control circuit.

The utility model beneficial effect is; Be provided with the frequency of oscillation adjustment unit in the integrated circuit, the frequency of oscillation adjustment unit connects the IC interior oscillator, replaces traditional external crystal oscillator through the frequency of oscillation adjustment unit; By frequency of oscillation adjustment unit and the required frequency of the common resonance control integrated circuit of internal oscillator; Supply the integrated circuit vibration and generation work, thereby can reduce peripheral circuit and components and parts, reduce production costs; Increase the frequency of oscillation adjustment unit in the integrated circuit and need not external crystal oscillator and make small product size little, product height is integrated.

Description of drawings

Fig. 1 is the utility model embodiment 1 structural representation block diagram

Embodiment

Below in conjunction with accompanying drawing the embodiment of the utility model is done to describe in further detail.

The integrated circuit of a kind of built-in control frequency of oscillation as shown in Figure 1, the innovative point of the utility model are in integrated circuit, to be provided with the frequency of oscillation adjustment unit, and the frequency of oscillation adjustment unit connects the IC interior oscillator.The frequency of oscillation adjustment unit of the utility model preferentially adopts ring oscillator, and the ring oscillator agent structure adopts three grades of comparator component to form oscillation rings.Every grade of comparator component of the utility model mainly comprises inverter, electric capacity and comparator.Through metal-oxide-semiconductor capacitor charge and discharge is constituted transmission delay; The frequency of control generator will be revised frequency of oscillation, needs to change the size adjustment of discharging current or electric capacity; Main method for using is resistance scorification silk mode and programmable mode; Make the frequency of frequency of oscillation adjustment unit reach the required accurate operating frequency of this integrated circuit, do not change, thereby replace the frequency of traditional external crystal oscillator with technology, voltage, temperature.What resistance scorification silk mode and programmable mode mainly embodied is: draw several frequency adjustment pin or detection welding pads that adopt resistance scorification silk mode or programmable mode to revise frequency of oscillation at the frequency of oscillation adjustment unit and be placed on integrated circuit surface; In production test integrated circuit process; The common resonance frequency required according to this IC interior oscillator; Resistance value changing frequency adjustment pin or detection welding pad deferent segment makes comparator reference voltage more stable; To revise the frequency of frequency of oscillation adjustment unit; Thereby reach the required operating frequency of this integrated circuit, mention frequency adjustment pin or its quantity of detection welding pad that the frequency of oscillation adjustment unit draws here and decide according to the accuracy of the required frequency of this integrated circuit.

Embodiment 1

The integrated circuit of a kind of built-in control frequency of oscillation as shown in Figure 1; The integrated circuit of the utility model is remote controller or clock and watch integrated circuit, and remote controller or clock and watch integrated circuit comprise that also keyboard scan input circuit, keyboard I/O scan circuit, coding circuit, sequential generate control circuit and output control circuit.Internal oscillator connects sequential and generates control circuit and frequency of oscillation adjustment unit; Sequential generates control circuit and connects coding circuit, keyboard I/O scan circuit and output control circuit; The keyboard scan input circuit is connected coding circuit with keyboard I/O scan circuit, and coding circuit connects output control circuit.Be provided with the frequency of oscillation adjustment unit in the above-mentioned integrated circuit; The frequency of oscillation adjustment unit connects the IC interior oscillator; By frequency of oscillation adjustment unit and the required frequency of the common resonance control integrated circuit of internal oscillator, supply the integrated circuit vibration and generation work.

Certainly, the utility model is not limited to the remote controller that embodiment 1 lifted or the integrated circuit of clock and watch, and it can also be adaptable across the various integrated circuits that need the control frequencies of oscillation.