公开(公告)号：WO1993009601A1

公开(公告)日：1993-05-13

申请号：PCT/US1992009285

申请日：1992-10-29

Applicant: I-CUBE DESIGN SYSTEMS INC. ,  PiE DESIGN SYSTEMS INC.

Inventor： I-CUBE DESIGN SYSTEMS INC. ,  PiE DESIGN SYSTEMS INC. ,  JENQ, Yih-Chyun ,  HORNG, Chi-Song ,  LOFSTROM, Keith

IPC: H03K19/0175

CPC classification number: H03K5/026

Abstract: A bidirectional bus repeater (10) includes two unidirectional bus repeaters (11, 13) connected for retransmitting signals in opposite directions between two buses (12, 14). When an external bus driver pulls either bus low, one of the unidirectional bus repeaters pulls the other bus low. When the external bus driver allows the bus to rise to the high logic level, the unidirectional bus repeater temporarily supplies a high charging current to the other bus to quickly pull it up. Each unidirectional bus repeater (11, 13) also generates signals indicating when it is actively pulling its output bus up or down and the indicating signals inhibit one unidirectional bus repeater from actively driving its output when the other unidirectional bus repeater is actively driving its output.