Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1997-01-08
1999-01-12
Do, Diep N.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324667, 324690, 73 73, 239 64, G01R 2726, G01N 2722
Patent
active
058595368
ABSTRACT:
A sensing device includes a pair of sensing electrodes disposed within a medium and a circuit connected to the sensing electrodes via impedance matching networks for producing an output signal which varies in response to a capacitive change in the medium. The circuit includes a first circuit portion including the sensing electrodes and a second circuit portion including the oscillator. The first and second circuit portions are tuned to match their impedance for more accurately measuring the capacitive changes.
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Do Diep N.
Haugen Oliver
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