Measurement amplifier
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United States of America Patent
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Jun 23, 1998
Grant Date -
N/A
app pub date -
Jun 13, 1996
filing date -
Jun 23, 1993
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A measurement amplifier has an integrator circuit (2) and a reference current source (33) which supplies a reference current to the input of the integrator when the voltage set at the output of the integrator (2) exceeds or falls below a reference voltage. In addition, a differentiator, for example, is provided which receives the output voltage of the integrator (2) and supplies an output signal which is proportional to the variation in time of the output voltage of the integrator. The output voltage of the differentiator is proportional to the input current to be measured by the measurement amplifier. The measurement amplifier allows very weak input currents to be rapidly and accurately detected.
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