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. 12, 2011
Filed:
Oct. 25, 2006
Shiro Dosho, Osaka, JP;
Kazuaki Sogawa, Osaka, JP;
Yuji Yamada, Osaka, JP;
Naoshi Yanagisawa, Osaka, JP;
Shiro Dosho, Osaka, JP;
Kazuaki Sogawa, Osaka, JP;
Yuji Yamada, Osaka, JP;
Naoshi Yanagisawa, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A constant determination unit () determines various constants, that are the magnitude of a charge current outputted from a charge pump circuit (), the time constant of a loop filter (), and the gain of a voltage controlled oscillator (), so as to make the proportionality constant of a natural frequency of a phase locked loop circuit for the input frequency of the phase locked loop circuit and the damping factor to be predetermined values, and outputs various control signals based on the determined constants. The charge pump circuit (), the loop filter (), and the voltage controlled oscillator () modify the magnitude of the charge current, the time constant, and the gain, respectively, in accordance with control signals outputted from the constant determination unit ().