Gao Yuan,Casters Jerome Jean Pierre Luc,Ollitrault Stephane Laurant Michel
申请号：
US201615363160
公开号：
US2017162275(A1)
申请日:
2016.11.29
申请国别(地区):
美国
年份:
2017
代理人:
摘要：
A compensation circuit for compensating for an input charge at a first input of a sample and hold circuit, comprising: a first buffer, a first compensation capacitor comprising a first compensation terminal switchable between a first buffer input and a first buffer output, and a second compensation terminal switchable between the first buffer output and a reference terminal, and a control circuit to switch the first compensation terminal to the first buffer output and the second compensation terminal to the reference terminal during sampling, for storing a compensation charge into the first compensation capacitor, and to switch the first compensation terminal to the first buffer input and the second compensation terminal to the first buffer output during holding, for discharging the first compensation capacitor into the first input. The compensation charge is substantially equal to the input charge.
