Regulator for current source transistor bias voltage

Details Regulator for current source transistor bias voltage Regulator for current source transistor bias voltage

1988-02-04

1988-11-22

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323315, 323901, G05F 330

Patent

active

047868554

ABSTRACT:
A bias control loop forms a voltage regulator for providing the bias voltage to the collectors of bipolar current source transistors in a linear circuit. The bias loop functions by maintaining equal or related base/emitter voltages on the several transistors. By properly sizing the emitter areas of the transistors, interrelated voltages and transistor biases are provided in the loop. The bias loop works down to less than 1 volt and is stable without a compensation capacitor.

REFERENCES:
patent: 3886435 (1975-05-01), Steckler
patent: 4123698 (1978-10-01), Timko et al.
patent: 4287467 (1981-09-01), Gloaguen
patent: 4567426 (1986-01-01), van de Plassche et al.
patent: 4567537 (1986-01-01), Kalkhof et al.
patent: 4574233 (1986-03-01), Taylor
National Semiconductor Data Sheet for LM134/LM234/LM334 3-Terminal Adjustable Current Source.

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