High Gain, Two-Stage, Fully Differential Audio Amplifier with 0.18m CMOS Technology

摘要

The two-stage, fully differential audio amplifier with 0.18μm CMOS technology and TSMC process is proposed. Telescopic amplifier created stage one and common emitter structure used to provide high gain in stage two. The amplifier has a ±1.2V differential output swing and a gain greater than 127dB while consuming power less than 10mW from 1.8V supply voltage. The step response of the audio amplifier is about 0.04us and the gain-bandwidth of the circuit is near 1.1GHz. Hspice software used to produce simulation results.