High Precision Analog Signal Processing Method for Multi-voltage Reference

In order to solve the problem of low voltage reference chip stability, an analog signal processing method based on multi-voltage reference chip is designed. Multiple voltage reference chips are used in circuit design. One voltage reference chip is connected to AD chip as external reference input, and the remaining voltage reference chip is connected to different analog inputs of AD chip. Digital signal processing sends synchronous acquisition signal to the AD chip, receives the multichannel voltage reference digital signal fed back by the AD chip, judges the validity of the multi-channel voltage reference digital signal, and determines the final voltage reference through the fusion compensation of the multi-channel reference signal, so as to realize the purpose of high-precision analog signal processing.