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. 27, 2004
Filed:
Jul. 23, 2001
Applicant:
Inventors:
Takushi Kimura, Kawasaki, JP;
Masamichi Nakajima, Kawasaki, JP;
Assignee:
Fujitsu General Ltd., Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L 7/00 ;
U.S. Cl.
CPC ...
H03L 7/00 ;
Abstract
When a voltage oscillator oscillates abnormally and a PLL circuit stops operating, in order to return to normal operation quickly, presence/absence of a comparison signal (fc) outputted from a frequency divider ( ) is detected, and at times when there is no comparison signal (fc), an output signal of a phase comparator ( ) is forcibly controlled to a low level temporarily, and an oscillation frequency of a voltage control oscillator ( ) is decreased. The present invention is suitable for generation of a sampling clock of a wide range which is used when digitally processing analog image signals, and for the like