The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 1977
Filed:
May. 07, 1975
Applicant:
Inventor:
Robert Herman Dawson, Kingston, NJ (US);
Assignee:
RCA Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ; H01G / ; H01G / ;
U.S. Cl.
CPC ...
357 14 ; 357 23 ; 357 24 ; 317231 ; 317233 ;
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.