Overload protection circuit for amplifiers

Details Overload protection circuit for amplifiers Overload protection circuit for amplifiers

1976-05-27

1978-01-10

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

361 91, 330207P, H02H 720

Patent

active

040682781

ABSTRACT:
An overload protection circuit for an amplifier including a first voltage responsive protection network in the form of a pair of back-to-back ordinary diodes connected to the amplifier input, a second voltage responsive protection network including diodes connected between the first protection network and the circuit reference or ground, and a feedback path between the amplifier output and the junction of the first and second protection networks for applying to the junction a voltage of the same magnitude and polarity as that applied to the amplifier input during non-overload conditions to prevent or minimize loading on the amplifier input by the first protection network. The circuit operates with no bias applied to the first protection network to prevent leakage current flow into the amplifier.

REFERENCES:
patent: 3200346 (1965-08-01), Young
patent: 3712995 (1973-01-01), Steudel
patent: 3979642 (1976-09-01), Cath et al.

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