Precision voltage controlled current source with variable compli

Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...

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323312, 330105, 330260, G05F 308

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051534991

ABSTRACT:
A voltage controlled current source with variable compliance produces a load current through a load impedance where the load current value is substantially independent of the value chosen for the load impedance. The value of the current is substantially proportional to the difference between a first and second input voltage, and is substantially inversely proportional to a value of resistance chosen as a sense resistance. The current source comprises two variable gain instrumentation amplifiers and a resistance means connected in series with the load impedance.

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Guy, John; "Build a Precise, Low-Current Source"; Electronic Design; pp. 105-106; Aug. 9, 1990; Cleveland, Ohio.
Henry, Tim; "Analysis and Design of the Op Amp Current Source"; Motorola Publication AN587; pp. 1-7; 1973; Phoenix, Ariz.
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