CMOS band-gap reference source circuit

Abstract

The invention provides a CMOS band-gap reference source circuit. The circuit comprises a power supply module, a band-gap core circuit and a current source adjusting circuit, the output of the band-gap core circuit is fed back to the current source adjusting circuit, and the current of the current source adjusting circuit is adjusted. The power supply module adjusts the band-gap core circuit according to the output of the adjusted current source adjusting circuit so that the stable output of the band-gap circuit is realized; and the circuit is provided with a feedback circuit structure, adaptive stable adjustment can be realized, the circuit outputs a stable voltage, and a high integration level, a low noise and a high signal-to-noise ratio of the circuit can be realized through a CMOS device.

Description

technical field [0001] The invention relates to the field of analog integrated circuit design, in particular to a CMOS bandgap reference source circuit. Background technique [0002] The current development of electronic technology tends to be miniaturized and integrated, especially the latest wearable devices, whose product size is getting smaller and smaller, which requires higher and higher requirements for circuit design. On the one hand The size of the circuit needs to be small enough, and on the other hand, the stability of the circuit needs to be high enough; and the power supply circuit is the most commonly used analog circuit in electronic circuits. The smaller the device, the more stable power supply circuit is needed to ensure the stable operation of the circuit. [0003] Due to the small size of wearable device products, it is more susceptible to the influence of the external environment, and the increase in the degree of circuit integration is interfered by oth...

AI Technical Summary

Problems solved by technology

[0004] In view of the above existing problems, the object of the present invention is to provide a CMOS bandgap reference source circuit, which can solve the problem that the output of the existing bandgap reference source circuit is not stable enough and the noise is large

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