Differential current source with active common mode reduction
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United States of America Patent
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-
Dec 31, 2002
Grant Date -
May 23, 2002
app pub date -
Oct 4, 2001
filing date -
Nov 21, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A voltage-controlled current source provides operation as either a differential current source for a floating load, or operation as a grounded current source when one end of the load is grounded. Switching between operation as a differential current source and operation as a grounded current source is automatic, and will accommodate significant lead resistance between the source and the load. Additionally, in absence of a grounded load the circuit can provide active common mode reduction using active feedback to reduce common mode voltage on the load.
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