公开(公告)号：US20170310236A1

公开(公告)日：2017-10-26

申请号：US15646582

申请日：2017-07-11

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Shunichi KAERIYAMA ,  Kouichi YAMAGUCHI ,  Koichi NOSE

IPC: H02M7/06 ,  H04L25/49 ,  H04B3/50 ,  H04L25/02 ,  H04B5/00

CPC classification number: H04B5/0031 ,  H01L2224/451 ,  H01L2224/48137 ,  H01L2924/12032 ,  H01L2924/13091 ,  H04B3/50 ,  H04L25/0266 ,  H04L25/4902 ,  H01L2924/00 ,  H01L2924/00014

Abstract: Provided is a receiving circuit that operates in a power supply system different from a transmitting circuit outputting a transmission signal and receives the transmission signal through an AC coupling device where a primary coil through which the transmission signal flows and a secondary coil having a center tap to which a specified voltage is supplied from an external terminal are magnetically coupled, which includes a pulse width amplifier circuit that holds pulse signals appearing at both ends of the secondary coil for a specified period of time and outputs them as hold signals, respectively, and a differential amplifier that compares a voltage of the hold signal and a voltage of the hold signal and outputs a comparison result.