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:
Nov. 25, 2008
Filed:
Jun. 24, 2004
Takeshi Fujii, Osaka, JP;
Kenji Adachi, Aichi, JP;
Hiroaki Ozeki, Osaka, JP;
Mineyuki Iwaida, Kyoto, JP;
Takeshi Fujii, Osaka, JP;
Kenji Adachi, Aichi, JP;
Hiroaki Ozeki, Osaka, JP;
Mineyuki Iwaida, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
VCO (voltage-controlled oscillator) device used for a radio unit such as a television broadcast receiver. A VCO device oscillating in a wide band of oscillation frequency and capable of realizing low power consumption is provided. VCO circuit grouposcillates signals of frequencies corresponding to control voltage Vt applied to frequency control voltage terminal. LO signal selecting meansselects a required output signal from VCO circuit group. PLLfrequency-divides local signal fvco selected by LO signal selecting means, compares a phase thereof with a phase of a reference signal and outputs a signal converted from a phase difference. Loop filtersmoothes the output signal from PLL, outputs control voltage Vt that is a frequency control voltage and outputs the local-signal selected by signal selecting meansto high frequency signal processing means
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