关键词: 共源共栅, 共源放大器, 负反馈, PSRR

Abstract:

In the actual application circuit,the noise and volatility will often be unwittingly introduced into the supply voltage,thus affecting output voltage.To make the circuit stable,one needs to eliminate or suppress the noise generated.Three methods are discussed in this paper to improve power supply rejection ratio amplifier (PSRR): cascode methods,feedback technology,and the design that can reduce the power of the additional output voltage gain of the circuit.A comparison of the simulation data transmission of these three methods show that they can maintain a high gain and are helpful for cascaded amplifier circuit design,and the additional circuitry meets the stability requirement of the of power supply fluctuations.

Key words: Cascode;common-source amplifier;common-source amplifier;PSRR