Apparatus and method for protecting an amplifier circuit

Details Apparatus and method for protecting an amplifier circuit Apparatus and method for protecting an amplifier circuit

1994-12-29

1996-10-22

DeBoer, Todd

Electricity: electrical systems and devices

Safety and protection of systems and devices

Voltage regulator protective circuits

361 75, 361 94, 330298, H02H 304

Patent

active

055683428

ABSTRACT:
Circuit for protection of an amplifier stage comprising circuit switching means for turn-off of the stage and piloted through a logic gate OR by a monostable, which generates upon arise of abnormal operating conditions turn-off command signals having a predetermined duration.
A sensing circuit upon persistence of abnormal conditions at start-up or during normal operation also sends turn-off signals through the logic gate OR after enablement through a gate AND.
The signals of any enablement at the logic gate AND arrive through a logic gate OR from a window comparator coupled with stage start-up members, from the monostable, and from the output of said logic gate AND as a confirmation signal.

REFERENCES:
patent: 4319197 (1982-03-01), Trummer
patent: 4441136 (1984-04-01), Hampshire
patent: 4878034 (1989-10-01), Gross et al.
patent: 4979066 (1990-12-01), Kawata et al.
patent: 5138516 (1992-08-01), Chapman

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