Self-bootstrapping transducer interface
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United States of America Patent
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-
Nov 5, 2002
Grant Date -
N/A
app pub date -
Jun 29, 2001
filing date -
Jun 29, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mechanism to provider a bootstrapped power source for a differential operational amplifier includes a three-winding transformer having a first winding disposed between a positive voltage and a plus power input to the amplifier, yielding an initial plus voltage, a second winding disposed between a negative voltage and a minus power input to the amplifier yielding an initial minus voltage, and a third winding disposed between a ground and a plus input to the amplifier providing a feedback path. The differential operational amplifier output is connected to ground. The said amplifier minus input is connect to a signal and when the signal is displaced a first amount from a first voltage, the plus and minus power inputs are displaced approximately the same amount from the initial positive and negative voltages.
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