Patent ID: 8427220
Filing Date: 2013-04-23
Classification: H03K,H04L

Abstract:
1. A ringing suppression circuit for a communication circuit that is connected to a transmission line having a pair of high and low potential side signal lines to perform communication by transmitting a differential signal through the transmission line, the ringing suppression circuit comprising: a high potential side switching element connected between a predetermined high potential reference point and the high potential side signal line; a low potential side switching element connected between a predetermined low potential reference point and the low potential side signal line; and a ringing suppression section configured to turn on the high potential side switching element based on a difference between a potential of the high potential side signal line and a potential applied to a control terminal of the high potential side switching element, the ringing suppression section configured to turn on the low potential side switching element based on a difference between a potential of the low potential side signal line and a potential applied to a control terminal of the low potential side switching element, wherein the high potential side switching element is an N-channel MOSFET having a gate as the control terminal, a drain connected to the high potential reference point, and a source connected to the high potential side signal line, and the low potential side switching element is a P-channel MOSFET having a gate as the control terminal, a drain connected to the low potential reference point, and a source connected to the low potential side signal line.