公开(公告)号：JPH04213940A

公开(公告)日：1992-08-05

申请号：JP2102791

申请日：1991-02-14

Applicant: ADVANCED MICRO DEVICES INC

Inventor： JIYON MAIKERU UINKUN ,  NADERU BIJIEE ,  IAN ESU KUREIFUOODO ,  JIEFURII MATSUKUSU BURUMENSARU

IPC: G06F13/00 ,  H03K5/02 ,  H03K5/156 ,  H03K19/0185 ,  H04L25/02 ,  H04L25/08 ,  H04L25/49

Abstract: PURPOSE: To provide a twist pair integrated medium attachment unit(MAU) to be operated for sending a reliable transmission signal from and to digital terminal equipment(DTE) on a LAN while using a twist pair. CONSTITUTION: A twist pair MAU 50 is provided with an integrated circuit 52 and an external medium dependent interface 54. Besides, a variable loop back mode is integrated for allowing the MAU 50 to be functioned either as a DTE MAU or as a repeater MAU. Corresponding to a twist pair differential signal, a line driver applies a ramp response having low jitter. On the other hand, an improved attachment unit interface driver provides CMOS technique using and simplified partition symbol control for the end of transmission. The twist pair MAU 50 allows over ride, state display, automatic polarity inversion of differential input line and polarity state signal sending combined in link state.