Patent ID: 6778009
Filing Date: 2004-08-17
Classification: H03F

Abstract:
A switched capacitor high voltage gain amplifier circuit, comprising:a first capacitor that is configured to store a sampled charge that is associated with an input signal during a sampling phase and transfer the sampled charge during a holding phase; a second capacitor that is configured to discharge during the sampling phase and provide a first capacitive feedback path such that a first amplified charge is stored on the second capacitor during the holding phase; a third capacitor that is configured to provide a second capacitive feedback path during the sampling phase; and an amplifier that is configured to amplify the transferred sampled charge during the holding phase, and buffer the amplified charge during the sampling phase, wherein the amplifier has a first frequency response during the holding phase and a second frequency response during the sampling phase, wherein a bandwidth of the second frequency response is wider than a bandwidth of the first frequency response.