Low voltage precision current source

Details Low voltage precision current source Low voltage precision current source

1982-02-26

1984-03-06

Beha, Jr., William H.

Electricity: power supply or regulation systems

Output level responsive

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

323281, 323315, G05F 156

Patent

active

044356781

ABSTRACT:
A circuit for providing a current at an output thereof of a predetermined value which has excellent ripple rejection characteristics whereby the magnitude of the current is maintain substantially constant with variations in the voltage supply applied thereto. The current source includes first and second complementary current mirror circuits interconnected such that the second current mirror sinks the current sourced from the first current mirror. A feedback loop latches the circuit into a stable operation and senses any difference current between the two current mirror circuits caused by perturbations of the supply voltage to produce feedback to maintain the circuit at its quiescent operating point.

REFERENCES:
patent: 3813607 (1974-05-01), Voorman
patent: 4329639 (1982-05-01), Davis
patent: 4341990 (1982-07-01), Davis
patent: 4396883 (1983-08-01), Holloway et al.
IBM Technical Disclosure Bulletin, vol. 13, No. 6, p. 1699, Nov. 1970.

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