公开(公告)号：JPH09167955A

公开(公告)日：1997-06-24

申请号：JP12966396

申请日：1996-05-24

Applicant: SGS THOMSON MICROELECTRONICS ,  CONS RIC MICROELETTRONICA

Inventor： GOLA ALBERTO ,  LEONE VIA TERRAZZANO ,  FUCILI GIONA ,  MILAZZO PATRIZIA

IPC: H03K17/00 ,  H03K17/082 ,  H03K19/00 ,  H03K19/003 ,  H03K19/0175 ,  H04L25/02

Abstract: PROBLEM TO BE SOLVED: To provide the detection and protection circuit for occurrence of a short-circuit for a digital output stage. SOLUTION: The detection and protection circuit for occurrence of a short- circuit for a digital output stage is provided and the circuit has an exclusive OR logic gate circuit EX1 with a 1st input terminal connecting to a signal input circuit (IN) and an output terminal connecting to an input terminal of a signal level shifter B. An exclusive OR 2nd logic gate circuit EX2 has a 1st input terminal connecting to the input node IN and a 2nd input terminal connecting to an output terminal OUT of the output stage B via an inverter circuit INI. A 2nd input terminal of the 1st logic gate circuit is connected to an output terminal of the 2nd logic gate circuit via a comparator circuit SCH1 and delay circuit means consisting of C, R, D.