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:
Dec. 18, 2007
Filed:
Mar. 02, 2005
Takayuki Tsukizawa, Neyagawa, JP;
Koji Takinami, Osaka, JP;
Hisashi Adachi, Mino, JP;
Yukio Hiraoka, Nishinomiya, JP;
Takayuki Tsukizawa, Neyagawa, JP;
Koji Takinami, Osaka, JP;
Hisashi Adachi, Mino, JP;
Yukio Hiraoka, Nishinomiya, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
The present invention provides a differential voltage control oscillator including: a parallel resonance circuit in which an inductor circuit, a variable capacitance circuit, and a radio-frequency switching circuit are connected in parallel together; and a negative resistance circuit connected in parallel with the parallel resonance circuit. The radio-frequency switching circuit includes: a first switching element; a first capacitive element; a second switching element; a second capacitive element; a control voltage terminal for supplying a common control voltage to the first and second switching control terminals, the control voltage terminal being connected to a virtual ground point for a differential signal generated in the parallel resonance circuit; a first radio-frequency signal reduction section connected between the control voltage terminal and the first switching element; and a second radio-frequency signal reduction section connected between the control voltage terminal and the second switching element.