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:
Oct. 13, 1998
Filed:
Dec. 04, 1996
Takeo Suzuki, Fukushima-ken, JP;
Masaki Yamamoto, Fukushima-ken, JP;
Masashi Suzuki, Fukushima-ken, JP;
Yasuharu Kudo, Fukushima-ken, JP;
Alps Electric Co., Ltd., , JP;
Abstract
The double tuning circuit of a TV tuner provided by the present invention comprises a primary tuning circuit and a secondary tuning circuit coupled with each other wherein at least one of the primary and secondary tuning circuits comprises two series circuits connected to each other in parallel with each of the two series circuits including damping resistors and/or resonance capacitors in addition to switching diodes which are each selectively turned on and off by using a predetermined switching voltage corresponding to signal reception states so that the frequency response of an intermediate-frequency signal obtained on the output side of the double tuning circuit is fixed independently of a channel receiving the incoming signal and the intensity of the electric field of the incoming signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile