Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1990-05-18
1993-07-27
Harvey, Jack B.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324458, G01R 2726
Patent
active
052313590
ABSTRACT:
A ceramic resonance type electrostatic sensor apparatus with an oscillator at a fixed frequency including a first ceramic resonator which has a fixed resonance frequency, a detecting unit for detecting a capacitance between the detecting unit and an object to be detected, a resonating circuit including a second ceramic resonator and having a resonance point which varies with the small change in capacitance detected by the detecting unit, a high impedance circuit connected between the oscillator and the resonating circuit, and a high impedance circuit connected between the resonating circuit and the detecting circuit.
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Direct-Coupled Gyrators with Floating Parts Siemens AG Jan. 3, 1967.
Masuda Noboru
Ohsawa Tetsuo
Sugimura Takashi
Harvey Jack B.
Murata Mfg. Co. Ltd.
Regan Maura K.
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