Patent ID: 9130469
Filing Date: 2015-09-08
Classification: H02M

Abstract:
1. An error amplifier comprising: a transconductance amplifier for receiving an input sampling voltage via an in-phase input terminal, and a reference voltage via a reversed-phase input terminal; a summing module connecting an output terminal of the transconductance amplifier through a direct current path via a first input terminal for receiving a direct current output of the transconductance amplifier, and connecting the output terminal of the transconductance amplifier through an alternating current path via a second input terminal for receiving an alternating current output of the transconductance amplifier; an output terminal of the summing module becoming an output terminal of the error amplifier; wherein, the direct current path comprises a first gating switch and a first capacitor, the output terminal of the transconductance amplifier comprises a first output terminal and a second output terminal, wherein, the first gating switch is connected between the first output terminal of the transconductance amplifier and the first input terminal of the summing module, and the first capacitor is connected between the first input terminal of the summing module and ground; wherein, the alternating current path comprises a first alternating resistor connecting between the second output terminal of the transconductance amplifier and the ground, the second input terminal of the summing module connects the second output terminal of the transconductance amplifier.