Reference current generator

Details Reference current generator Reference current generator

1994-12-20

1996-09-17

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

327542, G05F 316

Patent

active

055571948

ABSTRACT:
A reference current generator has a bipolar transistor Q1 having an emitter connected to a low-potential power source through a resistor R1, a bipolar transistor Q2 having a collector connected to the collector of the bipolar transistor Q1 and an emitter connected to the low-potential power source, and a bipolar transistor Q3 having a base connected to the bases of the transistors Q1 and Q2, an emitter connected to the low-potential power source, and a collector connected to a constant current source Io having negative temperature coefficient. The reference current generator provides a reference current Iref as the sum of a collector current of the bipolar transistor Q1 and a collector current of the bipolar transistor Q2. The reference current Iref may have a compensated, positive, or negative temperature coefficient as required.

REFERENCES:
patent: 4442398 (1984-04-01), Bertails et al.
patent: 4563632 (1986-01-01), Palara et al.
patent: 5173656 (1992-12-01), Seevinck et al.
patent: 5436552 (1995-07-01), Kajimoto

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