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. 01, 2013
Filed:
Sep. 29, 2010
Junichiro Yamakawa, Sayama, JP;
Kazuo Akaike, Sayama, JP;
Mikio Takano, Sayama, JP;
Hiroshi Hoshigami, Sayama, JP;
Kenji Kawahata, Sayama, JP;
Kietsu Saito, Sayama, JP;
Yasushi Yamamoto, Sayama, JP;
Tatsunori Onzuka, Sayama, JP;
Toshimasa Tsuda, Sayama, JP;
Susumu Yoshimoto, Sayama, JP;
Junichiro Yamakawa, Sayama, JP;
Kazuo Akaike, Sayama, JP;
Mikio Takano, Sayama, JP;
Hiroshi Hoshigami, Sayama, JP;
Kenji Kawahata, Sayama, JP;
Kietsu Saito, Sayama, JP;
Yasushi Yamamoto, Sayama, JP;
Tatsunori Onzuka, Sayama, JP;
Toshimasa Tsuda, Sayama, JP;
Susumu Yoshimoto, Sayama, JP;
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Abstract
There is provided a voltage controlled oscillator that is compact and can be manufactured at low cost. The voltage controlled oscillator is structured to include: a resonance part including a variable capacitance element and an inductance element, the variable capacitance element having a capacitance that varies according to a control voltage for frequency control input from an external part, and a series resonant frequency of the resonance part being adjusted according to the capacitance; an amplifying part amplifying a frequency signal from the resonance part; and a feedback part including a capacitance element for feedback and feeding the frequency signal amplified by the amplifying part back to the resonance part to form an oscillation loop together with the amplifying part and the resonance part, wherein the amplifying part is provided in an integrated circuit chip, and the resonance part and the capacitance element for feedback are formed as circuit components separate from the integrated circuit chip. The circuit components are selected according to an oscillation frequency.