Electrostatic voltmeter
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United States of America Patent
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Oct 21, 2008
Grant Date -
May 1, 2008
app pub date -
Oct 27, 2006
filing date -
Oct 27, 2006
priority date (Note) -
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Abstract
An electrostatic voltmeter has an input sensing terminal, a first operational amplifier, a second operational amplifier, a first reference voltage terminal electrically connected to the non-inverting input of the second operational amplifier, a low reference voltage terminal electrically connected to the output of the second operational amplifier, and a voltage indicator, electrically connected between the low reference voltage terminal and the first reference voltage terminal.
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