Electrostatic voltmeter

Details Electrostatic voltmeter Electrostatic voltmeter

G - Physics

01

R

324/59

G01R 29/12 (2006.01)

Patent

CA 1125373

ELECTROSTATIC VOLTMETER . Abstract of the Disclosure An electrostatic voltmeter for measuring the elec- trostatic potential on a photosensitive drum has a detector capacitively coupled to the drum for providing an output signal in response to the potential on the drum. An AC voltage source is coupled in circuit with the drum and the detector for applying an-AC signal across the surface-to- detector capacitance. Circuitry coupled to the detector determines the detector gain in response to the value of the AC component of the output signal and the value of the applied AC signal. The product of the reciprocal of the detector gain and the value of the DC component of the output signal is representative of the electrostatic potential on the surface.

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