Biasing circuit, clock circuit, chip and electronic equipment

Abstract

The invention relates to the technical field of integrated circuits, in particular to a bias circuit, a clock circuit, a chip and electronic equipment. The bias circuit includes: an operational amplifier circuit for inputting a reference voltage; a first current source for providing a first current; a switch circuit; a compensation circuit connected to the first node for providing a second current; The third current of the zero temperature coefficient circuit is equal to the sum of the first current and the second current. Since the reference voltage is constant and the total resistance of the zero temperature coefficient circuit remains constant without being affected by temperature, the third current flowing through the zero temperature coefficient circuit is constant. Compared with the traditional technology, obviously, it can reduce calculation deviation. Moreover, the compensation circuit can provide the second current. Obviously, through the compensation function of the compensation circuit, it can reduce the influence of the voltage fluctuation of the external power supply or the interference of the impedance of the switch itself on the calculation of the first current.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a bias circuit, a clock circuit, a chip and electronic equipment. Background technique [0002] The clock circuit is an important module in the microprocessor chip, and its performance is of great significance to the microprocessor chip. [0003] The traditional clock circuit adopts the RC clock circuit, and the RC clock circuit is widely used in integrated circuits because of its classic structure. Wherein, the bias circuit is widely used in the RC clock circuit, and the bias circuit outputs a clock signal in cooperation with the RC clock circuit by outputting a bias voltage. [0004] In the process of implementing the present invention, the inventor found at least the following problems in the traditional clock circuit: Since each discrete component of the bias circuit is easily affected by the temperature of the surrounding environment of the chip, the precision o...

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the traditional clock circuit has at least the following problems: Since each discrete component of the bias circuit is easily affected by the temperature of the surrounding environment of the chip, the precision of the clock signal output by the RC clock circuit is not high

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