A Study on The Application of PSR In Circuit Design

Abstract

The power supply rejection ratio (PSR) is an indicator that reflects the sensitivity of a circuit to power supply noise and directly affects the stability and performance performance of the circuit. The aim of this study is to go through the concept of PSR, and the derivation methodology, and to propose a design methodology to enhance PSRR, focusing on the application in the design of stand-alone amplifiers and other circuits. The study uses mathematical derivation and circuit simulation to analyze the effects of different design options on PSRR. Through experimental and theoretical analyses, this paper proposes a series of effective methods to enhance PSRR in stand-alone amplifiers and other circuit designs, including optimizing the power supply line, introducing filters, and adopting suitable power supply decoupling capacitors. The results show that through reasonable circuit design and optimization, the PSRR of the circuits can be significantly enhanced and their resistance to power supply noise can be strengthened, thus improving the stability and performance of the circuits.