Patent ID: 7345540
Filing Date: 2008-03-18
Classification: H03F

Abstract:
1. An amplifier circuit, comprising: a feedback loop; a former stage amplifier unit coupled to an input node of the amplifier circuit and the feedback loop for amplifying the difference between an input signal received from the input node and a feedback signal outputted from an output node of the feedback loop, and outputting a first output signal according to the amplified difference; a compensating amplifier unit coupled to the former stage amplifier unit for amplifying the first output signal and outputting a second output signal; and an output stage amplifier unit coupled to the compensating amplifier unit and the feedback loop for inputting the second output signal and outputting a third output signal according to the second output signal; wherein there is no feedback loop from an output of the compensating amplifier unit to an input of the former stage amplifier unit.