Biasing circuit, clock circuit, chip and electronic equipment

Abstract

The invention relates to the technical field of integrated circuits, in particular to a biasing circuit, a clock circuit, a chip and electronic equipment. The biasing circuit includes an operational circuit used for inputting reference voltage, a first electric current source used for supplying first electric current, a switch circuit, and a compensating circuit which is linked to a first node and used for providing second electric current, wherein the magnitude of third electric current flowing through a zero-temperature coefficient circuit is equal to the sum of the magnitude of the first electric current and the magnitude of the second electric current. Since the reference voltage remains unchanged and the total resistance of the zero-temperature coefficient circuit is out of the influence of temperature and remains unchanged, the third electric current flowing through the zero-temperature coefficient circuit remains the same. Compared with a traditional technique, obviously, the deviation value of calculation can be decreased. Moreover, the compensating circuit can supply the second electric current, obviously, and by the compensation effect of the compensating circuit, the voltage fluctuation of an external power source or the influence caused on the calculation of the first electric current by the resistance interference of the switch can be reduced.

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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