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:
Jul. 13, 2004
Filed:
Oct. 02, 2002
Masanori Fujidai, Yokohama, JP;
Hiroshi Nishida, Yokohama, JP;
Takahiro Baba, Yokohama, JP;
Koichi Sakamoto, Yokohama, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A high-frequency oscillation circuit includes a resonance circuit and an active circuit. The active circuit includes a field-effect transistor and a capacitor. An impedance-conversion circuit including a high-impedance line, a capacitive stub, and a connecting line such as wire, is connected between the active circuit and the resonance circuit. Accordingly, the impedance-conversion circuit can convert the characteristic impedance of the resonance circuit so that the absolute value of the reflection coefficient of the active circuit increases. As a result, the oscillation conditions can be easily fulfilled.