Stable bias current source

Details Stable bias current source Stable bias current source

1989-03-29

1990-12-04

Stephan, Steven L.

Electricity: power supply or regulation systems

Self-regulating

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

323907, G05F 316

Patent

active

049756320

ABSTRACT:
A bias current supply circuit (20) is provided which includes an initial current source comprising a FET (22) coupled to a current mirror circuit comprising a pair of BJTs (26 and 28). An active resistive element comprising a second FET (24) is included to stabilize an output current I.sub.O with respect to ambient temperature variations and process variations.

REFERENCES:
patent: 4100436 (1978-07-01), van de Plassche
patent: 4399375 (1983-08-01), Sempel
patent: 4647840 (1987-03-01), Hiyama
patent: 4725770 (1988-02-01), Okutsu et al.
patent: 4779061 (1988-10-01), Matthies
patent: 4786856 (1988-11-01), Metcalf et al.
patent: 4804927 (1989-02-01), Yamakoshi et al.
patent: 4808847 (1989-02-01), Van Kessel
patent: 4825145 (1989-04-01), Tanaka et al.

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