Temperature-independent variable-current source

Details Temperature-independent variable-current source Temperature-independent variable-current source

1990-04-16

1990-10-30

Stephan, Steven L.

Electricity: power supply or regulation systems

Self-regulating

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

323907, G05F 308

Patent

active

049671391

ABSTRACT:
This variable-current source comprises a differential stage and a pair of voltage buffers which respectively receive, at the input, a variable input voltage and a reference voltage and are connected at the output to the differential stage. Both buffers comprise a resistor flown by a current which varies only as a function of the respective input voltage and of its resistance and therefore depends thermally exclusively on this resistance, and provide output voltages which depend upon these currents, so that the output current generated by the differential stage is temperature-independent.

REFERENCES:
patent: 3979663 (1976-09-01), Herchner
patent: 4150309 (1979-04-01), Tokuda
patent: 4241315 (1980-12-01), Patterson et al.
patent: 4475077 (1984-10-01), Nagano
patent: 4587478 (1986-05-01), Kasperkovitz et al.
patent: 4647839 (1987-03-01), Siligoni et al.
patent: 4689549 (1987-08-01), Davis
patent: 4906915 (1990-03-01), Abdi

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