Capacitor-resistor oscillator circuit with enabling function

Abstract

The invention provides a capacitor-resistor oscillator circuit with an enabling function. The invention is applicable to the field of an integrated circuit. A period of an oscillation signal generated by the circuit is in proportional relation with a product of a fourth resistor and a first capacitor. A low pass filter is formed by a first resistor in the circuit and grid capacitors of a forth PMOS tube and a fourth NMOS tube, and carries out filtering shaping on a signal generated by an oscillator so as to reduce signal noise. When the circuit works, an eighth NMOS tube, a ninth NMOS tube, a tenth NMOS tube, an eighth PMOS tube, a ninth PMOS tube and a tenth PMOS tube are conducted, so that interference of a power supply and noise can be shielded, and noise of the signal generated by the oscillator is reduced. When the oscillator does not need to work, the oscillator circuit can be turned off by an enabling control end so as to reduce interference to other modules while reducing system power consumption and noise.

Description

technical field [0001] The invention relates to a resistance-capacitance oscillator circuit with an enabling function, which is applied to low-power consumption and low-noise clock circuits and circuit time constant detection circuits. The period of the oscillation signal generated by the circuit is proportional to the product of resistance and capacitance. The frequency of the oscillating signal can be controlled by the value of the resistor and capacitor, and the oscillator circuit can be turned off by enabling the control terminal to reduce interference to other modules and reduce system power consumption and noise. Background technique [0002] Oscillators are an important part of many electronic systems, and different electronic systems have very different requirements on the structure and performance parameters of the oscillators. Resistor-capacitor oscillation is widely used for its advantages of simple structure, low difficulty in starting oscillation, and easy integ...

AI Technical Summary

Problems solved by technology

Since the original oscillation circuit does not enable the control terminal, when the oscillation signal is not needed, the circuit still generates an oscillation signal, which interferes with other circuit modules and consumes additional circuit power consumption

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