Matching current source
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United States of America Patent
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-
Nov 10, 1987
Grant Date -
N/A
app pub date -
Nov 20, 1986
filing date -
Nov 20, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a matching current source for providing equivalent sink and source current, external voltage controls the amplitude of sink current and an operational amplifier is connected to mirror the sink current to the source current. The operational amplifier comprises a unity gain feedback loop for eliminating the effect of the channel length modulation effect in MOS transistors and the Early Effect in bipolar transistors, and serves the function of generating equivalent sink and source currents.
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