Polarity voltage buffer circuit for multi-polarity signal waveform

The invention discloses a polarity voltage buffer circuit for a multi-polarity signal waveform, and belongs to the technical field of fabrics. The circuit structure is simpler, and particularly, the workload of designing a high-precision analog circuit which needs to be specially processed when a signal output card is PCBLayout is greatly reduced; the number of high-precision devices required by the signal output card in an input buffer link is greatly reduced, and the cost can be obviously reduced; due to the fact that only one differential buffer is arranged on each signal output card, the risk of temperature drift and long-term drift of equipment in the working process on equipment precision is greatly reduced, even if drift occurs, drift of all polarity reference voltages is consistent for the same signal card, and stability and reliability of the equipment are improved. And each signal output card only needs to calibrate the gain of one differential buffer, so that the workload of routine detection and c