Patent ID: 6259313
Filing Date: 2001-07-10
Classification: G06G,H03F

Abstract:
An apparatus including a chopper-stabilized telescopic differential amplifier circuit, comprising:inverse and noninverse signal input terminals for conveving a differential input signal with inverse and noninverse input signal phases;inverse and noninverse signal output terminals for conveving a differential output signal with inverse and noninverse output signal phases which correspond to said noninverse and inverse input signal phases;a telescopic differential amplifier circuit with first and second amplifier input terminals for receiving said inverse and noninverse input signal phases and with first and second amplifier output terminals for providing said inverse and noninverse output signal phases;an input signal switching circuit, coupled between said inverse and noninverse signal input terminals and said first and second amplifier input terminals, that in response to reception of at least one switch control signal alternately couples said inverse and noninverse signal input terminals to said first and second amplifier input terminals;an output signal switching circuit, coupled between said first and second amplifier output terminals and said inverse and noninverse signal output terminals, that in response to reception of said at least one switch control signal alternately couples said first and second amplifier output terminals to said inverse and noninverse signal output terminals; anda common mode capacitive feedback circuit coupled between said inverse and noninverse signal output terminals and said telescopic differential amplifier circuit.