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. 16, 2007
Filed:
Feb. 14, 2006
Hiroki Kobayashi, Fukushima-ken, JP;
Hiroki Kobayashi, Fukushima-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A resonance circuit is interposed between a base and a collector of an oscillating transistor and is configured such that a resonance frequency is switched in correspondence with two different frequency bands. A first feedback unit is interposed between the base and an emitter of the oscillating transistor and a second feedback unit is interposed between the emitter and the collector of the oscillating transistor. One of the first feedback unit and the second feedback unit is configured by series-parallel connection of three reactive elements so as to exhibit one of inductive and capacitance characteristics in the two different frequency bands, and the other feedback unit is configured so as to exhibit the same characteristic as that of one feedback unit. As a result, oscillation is performed in the two frequency bands.