Electricity: electrical systems and devices – Safety and protection of systems and devices – Voltage regulator protective circuits
Patent
1983-10-11
1986-01-28
Salce, Patrick R.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Voltage regulator protective circuits
361 98, 323315, 323312, H02H 720
Patent
active
045675376
ABSTRACT:
To limit the current through the emitter-collector path of an output transistor, typically a Darlington transistor pair (T7, T8) to a load, in case of short circuit or malfunction of the load (L), in which a control circuit path resistor (R1) is serially connected with the emitter-collector path of the output transistor and the load, a reference current source is provided, connected to have current flow additionally through the resistor (R1) and providing control current to the output transistor at a control terminal (2) thereof, thereby permitting self-regulation of output current to a safe level regardless of reflected load resistance.
REFERENCES:
patent: 3796943 (1974-03-01), Nelson et al.
patent: 4177416 (1979-12-01), Davis
patent: 4282478 (1981-08-01), Leidich
patent: 4338646 (1982-07-01), Davis et al.
Philips Technische Rondschau 1971/72, Nr. 1.
Kalkhof Bernd
Nagel Karl
Robert & Bosch GmbH
Salce Patrick R.
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