Variable capacitor

Details Variable capacitor Variable capacitor

1996-01-31

1999-05-04

Kincaid, Kristine

Electricity: electrical systems and devices

Electrostatic capacitors

Variable

361278, 361281, H01G 500

Patent

active

059010312

ABSTRACT:
A reference electrode is fixed on the bottom of a concave portion of a substrate. A movable electrode is provided so that its electrode face faces that of the reference electrode at an interval to form a capacitor by the movable and reference electrodes. A driving electrode for driving the movable electrode is fixed on the substrate at an interval from the movable electrode. The distance 2L between the driving and movable electrodes is twice the distance L between the movable and reference electrodes. An external bias voltage is applied between the driving and movable electrodes to deflect the movable electrode. This doubles the range of the displacement of the movable electrode, thereby increasing the capacity change rate of the variable capacitor.

REFERENCES:
patent: 2368643 (1945-02-01), Crosby
patent: 4196632 (1980-04-01), Sikorra
patent: 5168249 (1992-12-01), Larson
patent: 5175521 (1992-12-01), Larson
patent: 5228341 (1993-07-01), Tsuchitani et al.
patent: 5367429 (1994-11-01), Tsuchitani et al.
Patent Abstracts of Japan, vol. 17, No. 112 (P/1498), Mar. 8, 1993 & JP 04 299267 A (Abstract).
Patent Abstracts of Japan, vol. 17, No. 398 (E-1403), Jul. 26, 1993 & JP 05 074655 A (Abstract).

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