Electronic protective circuit

Details Electronic protective circuit Electronic protective circuit

1974-09-20

1976-09-07

Moose, Harry

Electricity: power supply or regulation systems

Remote sensing

317 31, 323 9, H02H 300

Patent

active

039796426

ABSTRACT:
Electronic protective circuitry for protecting an electrical circuit, such as a constant current source circuit, from damage due to an overvoltage applied to the circuit. The protective circuit employs circuitry for limiting the magnitude of the voltage across a first portion of the circuit, such as an amplifier output circuit, so that the voltage thereacross is limited to a given maximum voltage level. A current limiter is connected in series between the first portion and second portion for limiting the magnitude of current flowing through the circuitry to a given maximum current level. Essentially all of the overvoltage is applied across the current limiter. The protective circuit is particularly applicable for protecting an amplifier from damage due to an overvoltage applied to its output circuit, as well as for protecting a resistor connected in series with the output circuit of the amplifier.

REFERENCES:
patent: 3183446 (1965-05-01), Richman
patent: 3526810 (1970-09-01), Williams
patent: 3633093 (1972-01-01), Templeton, Jr. et al.
patent: 3760228 (1973-09-01), Uchida
patent: 3760284 (1973-09-01), Matejka

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