Complementary circuit device returnable to normal operation from latch-up phenomenon.

摘要

A complementary circuit device which cancels a latch-up phenomenon to return to normal operation includes a complementary circuit (52), a latch-up detection circuit (54) and a reset circuit (84). The complementary circuit (52), which is normally started from a prescribed state in response to initial power supply, may be erroneously started when the same is resupplied with power immediately after occurrence of a latch-up phenomenon. The latch-up detection circuit (54) detects a latch-up phenomenon occurring in the complementary circuit (52). The reset circuit resets the complementary circuit (52) from the prescribed state in response to an output from the latch-up detection circuit (54). The complementary circuit (52) is reset from the prescribed state similarly to the case of initial power supply, whereby the same is normally started to return to its operation also upon cancellation of the latch-up phenomenon.