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:
Apr. 09, 2013
Filed:
Sep. 28, 2010
Junichiro Yamakawa, Sayama, JP;
Kazuo Akaike, Sayama, JP;
Tatsunori Onzuka, Sayama, JP;
Toshimasa Tsuda, Sayama, JP;
Mikio Takano, Sayama, JP;
Yasushi Yamamoto, Sayama, JP;
Susumu Yoshimoto, Sayama, JP;
Junichiro Yamakawa, Sayama, JP;
Kazuo Akaike, Sayama, JP;
Tatsunori Onzuka, Sayama, JP;
Toshimasa Tsuda, Sayama, JP;
Mikio Takano, Sayama, JP;
Yasushi Yamamoto, Sayama, JP;
Susumu Yoshimoto, Sayama, JP;
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Abstract
To provide a voltage controlled oscillator having small size and capable of obtaining a low phase noise characteristic over a large span of adjustable range of frequency. A quartz crystal having a characteristic (dielectric loss tangent: tan δ) better than that of fluorocarbon resin, LTCC or the like conventionally used as a substrate of a resonance part, and on which a fine pattern of metal film can be formed through a photolithography method, is used as a quartz-crystal substrate, and a conductive line is formed on the quartz-crystal substrate to form an inductance element in the resonance part. Accordingly, since the resonance part having a high Q value can be formed, it is possible to obtain a voltage controlled oscillator having small size and low loss over a wide frequency range.