Planar voltage variable tuning capacitors

Details Planar voltage variable tuning capacitors Planar voltage variable tuning capacitors

1975-05-07

1977-01-25

James, Andrew J.

357 23, 357 24, 317231, 317233, H01L 2992, H01L 2978, H01G 900, H01G 918

Patent

active

040054667

ABSTRACT:
A voltage variable tuning capacitor structure is disclosed. A pair of metal-insulator-semiconductor (MIS) capacitors are fabricated in a body of semiconductor material in back-to-back configuration. The back-to-back configuration reduces the effect of intermodulation distortion. The device has a relatively high quality factor, Q, because of a relatively low transverse resistance which is provided by a doped region between the pair of capacitors. The device may be used for the electronic tuning of integrated RF receivers for television, VHF, UHF, AM or FM tuners.

REFERENCES:
patent: 3411053 (1968-11-01), Wiesner
patent: 3495137 (1970-02-01), Franks et al.
patent: 3644850 (1972-02-01), Ho
patent: 3810125 (1974-05-01), Stein

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