Transistor protection circuits

Details Transistor protection circuits Transistor protection circuits

1979-05-01

1981-05-26

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

330207P, 361 91, H02H 338

Patent

active

042701597

ABSTRACT:
A circuit employing parallel power transistors intended to share the load current, includes a separate current sensing resistor for each transistor and independently operating protection circuits controlled by the voltage drop across the associated sensing resistor to limit the current in each power transistor to a safe level. The protection circuits each include zener diodes and resistors connected to vary the current limit in accordance with the voltage across the power transistors.

REFERENCES:
patent: 3668545 (1972-06-01), Von Recklinghausen
patent: 4105944 (1978-08-01), Anderson
"Power Amplifier With Output Stage Protection Circuit"-Lamoreaux, IBM Tech. Disc. Bul., vol. 14, No. 3, 8/71.

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