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:
Jun. 30, 1992
Filed:
Dec. 31, 1990
Tadashi Kosuga, Kawagoe, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A first PIN diode is connected to the input side of a tuner at the front end of an FM receiver, in an AC coupled fashion parallel to the tuner. A correction inductance is connected parallel to the first PIN diode in an AC coupled fashion. The tuner is connected, at its output side, parallel to a series-connected circuit of a correction capacitor and a second PIN didode. The anodes of the first and second PIN diodes are supplied with an automatic gain control (AGC) voltage. When the AGC voltage varies, the resistances of the first and second PIN diodes vary in a manner to adjust the degree to which the correction inductance and the correction capacitor affect the resonance in the tuner.