Circuit arrangement for generating a bias potential

Details Circuit arrangement for generating a bias potential Circuit arrangement for generating a bias potential

1996-09-26

1997-08-12

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323314, G05F 304, G05F 316

Patent

active

056569270

ABSTRACT:
Circuit arrangement for generating a bias potential includes a first transistor connected on a collector side thereof to a supply potential, a first resistor connected between a base and the collector of the first transistor, a first current source connected between the base of the first transistor and a reference potential, a second current source connected between an emitter of the first transistor and the reference potential, a second transistor connected on a collector side thereof to the supply potential and on a base side thereof to the emitter of the first transistor, a third current source connected between the emitter of the second transistor and the reference potential, a third transistor carrying the bias potential on a collector side thereof, a second resistor connected between the emitter of the second transistor and a base of the third transistor, a third resistor connected between the collector of the third transistor and the supply potential, a first diode connected in the forward direction thereof between the base of the third transistor and the reference potential, and a fourth resistor connected between an emitter of the third transistor and the reference potential, the second and the third resistors having equal resistances and the fourth resistor having half the resistance of the second and the third resistors, respectively, and second and third current sources supplying a current which is dependent upon a collector current of the third transistor.

REFERENCES:
patent: 5168210 (1992-12-01), Thus
patent: 5208527 (1993-05-01), Poletto et al.
patent: 5258703 (1993-11-01), Pham et al.
patent: 5325045 (1994-06-01), Sundby
patent: 5352973 (1994-10-01), Audy
patent: 5410241 (1995-04-01), Cecil
patent: 5424628 (1995-06-01), Nguyen
patent: 5530340 (1996-06-01), Hayakawa et al.

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