Reference circuit for providing a plurality of regulated current

Details Reference circuit for providing a plurality of regulated current Reference circuit for providing a plurality of regulated current

1978-03-02

1979-12-04

Pellinen, A. D.

Electricity: power supply or regulation systems

Remote sensing

323 19, G05F 156

Patent

active

041774175

ABSTRACT:
The circuit includes a reference cell having four NPN transistors with the base-to-emitter junctions thereof connected in a loop with a resistor. A separate bias circuit is connected to at least one of the transistors of the cell. The collector-to-emitter paths of a first pair of the transistors are connected in series and the collector-to-emitter paths of a second pair of the transistors of the cell are also connected in series. The configuration of the cell enables the emitter of one of the transistors thereof to drive a plurality of controlled NPN current supply transistors so that a reference current developed in the resistor can be provided to plurality of circuit points requiring a reference current of a regulated magnitude which has a predetermined temperature coefficient.

REFERENCES:
patent: 3777251 (1973-12-01), Cecil et al.
patent: 3908162 (1975-09-01), Marley et al.
patent: 3922596 (1975-11-01), Cave et al.
patent: 3930172 (1975-12-01), Dobkin

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