Low-voltage, temperature compensated constant current and voltag

Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...

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323315, 323907, G05F 326

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active

047695897

ABSTRACT:
The reference circuit includes a current mirror for providing first and second current paths for the conduction of respective first and second currents. The current mirror imposes a current level relationship between the first and second currents. A load, preferably resistive, is provided in the first current path for predominantly establishing a predetermined level of the first current. A transistor having a temperature coefficient of a predetermined polarity and a resistor having a temperature coefficient of a complimentary polarity are provided in the second current path for providing temperature compensation. Finally, a load compensation stage is provided in the first and second current paths to provide a thermal compensation feedback path from the transistor and resistor compensation elements to permit stabilization of the first current level with respect to temperature.

REFERENCES:
patent: 4442398 (1984-04-01), Bertails et al.
patent: 4450367 (1984-05-01), Whatley
patent: 4481483 (1984-11-01), Kawamura

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