Temperature-compensated integrated circuit for uniform current g

Details Temperature-compensated integrated circuit for uniform current g Temperature-compensated integrated circuit for uniform current g

1990-03-23

1991-08-06

Miller, Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307491, 323315, G05F 308

Patent

active

050380532

ABSTRACT:
An integrated circuit has a first resistor and a second resistor. A base-emitter voltage differential is maintained across the first resistor to develop a first resistor current and a base-emitter voltage is maintained across the second resistor to develop a second resistor current. The first resistor current is mirrored and the second resistor current is subtracted from the mirrored current to obtain a reference current. The resistors have resistance values so that the products of each resistor current multiplied by its temperature coefficient are equal. The resulting reference current is temperature independent.

REFERENCES:
patent: 4323854 (1982-04-01), Hester
patent: 4381484 (1983-04-01), Jarrett
patent: 4587478 (1986-05-01), Kasperkovitz et al.
patent: 4786856 (1988-11-01), Metcalf et al.
patent: 4792748 (1988-12-01), Thomas et al.

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