公开(公告)号：US20040263376A1

公开(公告)日：2004-12-30

申请号：US10818776

申请日：2004-04-06

Applicant: Sony Corporation

Inventor： Yasuhide Shimizu ,  Shigemitsu Murayama ,  Yukitoshi Yamashita ,  Junji Toyomura

IPC: H03M001/12

CPC classification number: G11C27/024 ,  G11C27/026 ,  H03F3/45089 ,  H03F2203/45626 ,  H03F2203/45631 ,  H03F2203/45651 ,  H03F2203/45696 ,  H03F2203/45702 ,  H03F2203/45726 ,  H03K5/2481 ,  H03K5/249 ,  H03M1/142 ,  H03M1/206 ,  H03M1/365

Abstract: A comparator includes a sampling capacitor, a first switching unit which is connected to an input end of the sampling capacitor and which applies an input signal to the input end of the sampling capacitor, a second switching unit which is connected to the input end of the sampling capacitor and which applies a reference signal to the input end of the sampling capacitor, an output transistor connected to an output end of the sampling capacitor in a source follower connection manner or an emitter follower connection manner, and a third switching unit which is connected to an output end of the sampling capacitor and which maintains maintaining a voltage at the output end of the sampling capacitor to be constant. The input signal is compared with the reference signal.