A High Power Supply Rejection Ratio Reference Source Circuit

Abstract

The invention provides a high power supply rejection ratio reference source circuit, which includes a bias circuit module, a reference generation circuit module and a correction adjustment circuit module; the bias circuit module provides a bias current for the reference generation circuit module to ensure that the reference generation circuit module stable work; the reference generation circuit module generates and outputs a reference voltage with a high power supply rejection ratio; the correction adjustment circuit module inputs the correction adjustment parameters into the circuit to further ensure the accuracy and stability of the output reference voltage; the circuit of the present invention adopts a full MOS structure, and Two feedback loops are set, which effectively increases the feedback gain and power supply rejection ratio of the circuit. At the output end of the reference source circuit, the present invention sets a low-pass filter composed of MOS tube connections. While improving the power supply rejection ratio, It also effectively reduces the power consumption of the circuit.

Description

technical field [0001] The invention relates to the design of a reference source circuit system, in particular to the design of a reference source circuit with a high power supply rejection ratio. Background technique [0002] High-frequency switching and high-speed digital circuits will generate a lot of circuit noise during operation. Under the influence of circuit noise, the reference source circuit will generate high-frequency power supply ripple at the output end, resulting in a lower power supply rejection ratio, and ultimately affecting the normal operation of the entire circuit system. Current circuit design schemes for eliminating power supply output ripple have problems such as occupying a large chip area and increasing system power consumption. In view of the above problems, the present invention proposes a reference source circuit with a non-traditional bandgap structure and a high power supply rejection ratio. Contents of the invention [0003] The technical...

AI Technical Summary

Problems solved by technology

Under the influence of circuit noise, the reference source circuit will generate high-frequency power supply ripple at the output end, resulting in a lower power supply rejection ratio, and ultimately affecting the normal operation of the entire circuit system

The current circuit design scheme for eliminating power supply output ripple has problems such as occupying a large chip area and increasing system power consumption.

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