Current limit circuit

Details Current limit circuit Current limit circuit

1990-03-05

1994-02-22

Stephan, Steven L.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

361 18, G05F 1573

Patent

active

052891097

ABSTRACT:
A current limit circuit for limiting current flow through a load circuit. The amount of current flowing in the circuit is sensed by a current sensing resistor. The circuit includes a P-channel field effect transistor and an NPN bipolar transistor. When current sensed by the resistor attains a current limit value, the field effect transistor is turned on and its output current is amplified by the NPN transistor. The emitter of the NPN transistor is connected to the gate of another P-channel field effect transistor which is connected to the load circuit.

REFERENCES:
patent: 3109981 (1963-11-01), Muchnick
patent: 3305725 (1967-02-01), Huge et al.
patent: 3391330 (1968-07-01), Grossoehme
patent: 3527997 (1970-09-01), Nercessian
patent: 3896367 (1975-07-01), Frantz
patent: 4176309 (1979-11-01), Schulz et al.
patent: 4800331 (1989-01-01), Vesce et al.
patent: 4887021 (1989-12-01), Walker

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