Device for protecting a synchronous flip-flop of an elementary logic module against intrusion of errors

摘要

The circuit has a control module (20) comprising encoding blocks (21, 22) respectively receiving functional and synchronous outputs (R, SR) from a logic module (10) and providing codes (C1, C2). A synchronous flip-flop (23) receives the code (C1) and provides a code (C3). A comparator (24) compares the codes (C2, C3) and provides an error signal (ER1) having an active value, when the codes are not identical.