Temperature compensated current reference

Details Temperature compensated current reference Temperature compensated current reference

1997-02-21

2000-02-08

Nelms, David

Miscellaneous active electrical nonlinear devices, circuits, and

External effect

Temperature

327512, 327538, 323315, H01L 3500

Patent

active

060231858

ABSTRACT:
A circuit for providing a temperature-compensated reference current, the circuit comprising a current mirror and a V.sub.BE multiplier circuit. The current mirror includes a reference transistor with its collector providing the temperature-compensated reference current. The V.sub.BE multiplier circuit connects together the base and collector of the reference transistor so as to provide a voltage differential in a range of values having a greatest lower bound equal to V.sub.BE, and sinks (or supplies) base current to the reference transistor so that the reference current is not appreciably affected by the base current of the reference transistor.

REFERENCES:
patent: 4691262 (1987-09-01), Chalfin
patent: 4945259 (1990-07-01), Anderson

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