Device for protecting an audio amplifier against overload or sho

Details Device for protecting an audio amplifier against overload or sho Device for protecting an audio amplifier against overload or sho

1976-07-06

1977-11-08

Dahl, Lawrence J.

Amplifiers

Miscellaneous

Amplifier protection means

361 87, 361100, H03F 2100

Patent

active

040577678

ABSTRACT:
A device for protecting an audio amplifier against overload or short circuit. The device includes an output amplifier comprising a plurality of branches having output transistors, a preamplifier to control the output amplifier, and means for limiting the current through the transistors at an allowable value. The device further includes means which, when the current through the output transistors exceeds this value, limit this current at this value, and means which, in the presence of such an unallowably high current in one of the branches, immediately disconnect the output amplifier irrespective of the fact that this current occurs in the one or in the other branch.

REFERENCES:
patent: 3536958 (1970-10-01), Sondermeyer
patent: 3835412 (1974-09-01), Honda et al.
patent: 3890465 (1975-06-01), Kaizu

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