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:
May. 23, 2006
Filed:
Aug. 11, 2004
Norihide Kinugasa, Joyo, JP;
Yoshio Nirasawa, Muko, JP;
Hideo Hamaguchi, Takatsuki, JP;
Sachi Ota, Takatsuki, JP;
Norihide Kinugasa, Joyo, JP;
Yoshio Nirasawa, Muko, JP;
Hideo Hamaguchi, Takatsuki, JP;
Sachi Ota, Takatsuki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A PLL circuit that makes a voltage-controlled oscillator converge to a stable state within a short time and generates a clock signal with high stability even when discontinuity occurs in the period of a reference input signal is provided. The PLL circuit has a voltage-controlled oscillator for outputting a clock controlled, a first counter reset by the reference input signal having one period longer than a reference period within a predetermined period for outputting a first signal, a second counter for outputting a second signal, a reset pulse generating circuit for resetting the second counter, a loop filter for holding and outputting the control voltage varied by a phase error signal and a discontinuous input detecting part for detecting the reference input signal input initially after its period becomes longer than the reference period.