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. 09, 2012
Filed:
Sep. 28, 2010
Tatsunori Onzuka, Sayama, JP;
Junichiro Yamakawa, Sayama, JP;
Toshimasa Tsuda, Sayama, JP;
Kenji Kawahata, Sayama, JP;
Hiroshi Hoshigami, Sayama, JP;
Tatsunori Onzuka, Sayama, JP;
Junichiro Yamakawa, Sayama, JP;
Toshimasa Tsuda, Sayama, JP;
Kenji Kawahata, Sayama, JP;
Hiroshi Hoshigami, Sayama, JP;
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Abstract
There is provided a voltage controlled oscillator using a Colpitts circuit capable of suppressing deterioration (decrease) in variable range (adjustable range) of an output frequency due to the influence of an inductance component on a conductive line, which connects a connection point between two capacitors of a feedback part and an emitter of a transistor. In a VCO using a Colpitts circuit, with respect to capacitorsof a feedback part, a first feedback capacitance element (capacitor)is disposed so as to directly couple a terminal for base (connection part) and a terminal for emitter on a base substrate, to which a terminal part(T) extending from a base of a transistorand a terminal part(T) extending from an emitter of the transistorare fitted, respectively, and a second feedback capacitance element (capacitor)is disposed so as to directly couple the terminal for emitter and the terminal for grounding (ground electrode).