Power amplifier protection circuit

Details Power amplifier protection circuit Power amplifier protection circuit

1976-03-24

1977-10-18

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

330207P, 361103, 361 91, H02H 720

Patent

active

040539962

ABSTRACT:
A protection circuit for a bridge audio power amplifier having two pairs of output transistors coupled between positive and negative terminals of a direct current supply and providing a pair of output terminals for connection across a load. The bias of the output transistors are controlled in response to excessive current flow, a short of the output terminals to ground, excessive DC supply voltage, a short of the output terminals to the positive terminal of the DC supply, and excessive temperature to prevent permanent damage to the bridge audio power amplifier.

REFERENCES:
patent: 3449680 (1969-06-01), Schilb et al.
patent: 3496449 (1970-02-01), O'Connor
patent: 3564338 (1971-02-01), Teshirogi et al.
patent: 3755751 (1973-08-01), Ring
patent: 3814988 (1974-06-01), Ito
patent: 3898532 (1975-08-01), Frank
patent: 3924159 (1975-12-01), Hoover
patent: 3988644 (1976-10-01), Krone

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