Buffered bootstrapped input switch with cancelled charge sharing for use in high performance sample and hold switched capacitor circuits

Abstract

A buffered bootstrapped input switch employs cancelled charge sharing for use in high performance sample and hold switched capacitor circuits especially useful for implementing, for example, an analog-to-digital converter (ADC) or amplifier circuit front end sampling network, among others. A scheme is employed for estimating the charge loss from the bootstrapping capacitor to the gate of the bootstrapped input switch, storing the estimated charge loss on a small capacitor, buffering the small capacitor, and then adding the estimated charge loss in series to the bootstrap capacitor, to provide an almost ideal bootstrap network.

Dependencies are inferred from the claim text.