AMPLIFIER CIRCUIT HAVING A COMPENSATION CIRCUIT COUPLED TO AN OUTPUT NODE OF AN OPERATIONAL AMPLIFIER FOR IMPROVING LOOP STABILITY

摘要

An amplifier circuit includes an operational amplifier and a compensation circuit. The operational amplifier includes an amplifying stage for amplifying an input signal to generate an amplifying signal; and an output stage coupled to an output node of the amplifying stage for receiving the amplifying signal and generating an output signal according to the amplifying signal. The compensation circuit is coupled to the output stage and the amplifying stage for generating a compensation signal according to the output signal, and feeding the compensation signal back to the output node of the amplifying stage for compensating the amplifying signal.