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:
Jun. 09, 2009
Filed:
Feb. 13, 2008
Mineyuki Iwaida, Kyoto, JP;
Takeshi Fujii, Osaka, JP;
Mineyuki Iwaida, Kyoto, JP;
Takeshi Fujii, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A PLL circuit according to the present invention includes: a voltage controlled oscillatora frequency dividerthat divides an oscillation signal of the voltage controlled oscillatorand outputs a divided oscillation signal; a first phase comparatorthat outputs a phase difference between the divided oscillation signal of the frequency dividerand a reference signal; a charge pumpthat converts the output signal of the first phase comparatorinto a signal for controlling the voltage controlled oscillatora filter that allows a DC component of the output signal of the charge pumpto pass therethrough and outputs a voltage to the voltage controlled oscillatora second phase comparatorthat averages the phase difference between the divided oscillation signal of the frequency dividerand the reference signal with respect to time; and a current control circuitthat controls an operating current of the frequency dividerbased on the phase difference averaged with respect to time by the second phase comparatorWith this configuration, it is possible to provide a PLL circuit that achieves low power consumption and covers a wide range of oscillation frequencies.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile