Phase discrimination type electrostatic capacity detector

Details Phase discrimination type electrostatic capacity detector Phase discrimination type electrostatic capacity detector

1989-12-05

1991-09-17

Wieder, Kenneth A.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

324662, 324725, 34087037, G01R 2726

Patent

active

050498240

ABSTRACT:
A phase discrimination type electrostatic capacity detector includes an one-side electrode plate composed of a transmitting electrode and a receiving electrode, another-side electrode plate having coupling electrodes and disposed relatively movably with respect to the one-side electrode plate in a confronting relation with the same, a power supply connected to the transmitting electrode, and a detector circuit connected to the receiving electrode. The detector is miniaturized by disposing the transmitting electrode in a second hierarchy layer partitioned by an electrical insulating layer on a substrate and connecting in series the respective transmitting electrode elements of the same phase in a first hierarchy layer through coupling leads. The detector including a pair of receiving electrode elements between which the transmitting element is interposed, is miniaturized by leading out the coupling leads to one side end of the one-side electrode plate through a space between both receiving electrode elements.

REFERENCES:
patent: 3961318 (1976-06-01), Farrand et al.
patent: 4420754 (1983-12-01), Andermo
patent: 4429307 (1984-01-01), Fortescue
patent: 4449179 (1984-05-01), Meyer
patent: 4633249 (1986-12-01), Sasaki

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