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. 31, 2012
Filed:
Nov. 14, 2008
Atsushi Mino, Kobe, JP;
Atsushi Mino, Kobe, JP;
Fujitsu Ten Limited, Kobe, JP;
Abstract
Provided is a video signal processing device capable of judging the viability of phase locking at a PLL circuit and, in accordance with the judgment, automatically switching between the PLL circuit and a DLL circuit to use to generate a sampling clock of an input analog video signal, the device including an AD converter for AD converting an analog video signal, and a clock signal generating circuit for supplying a clock signal to the AD converter. The clock signal generating circuit includes: a PLL circuit for generating a first clock signal on the basis of a horizontal synchronous signal acquired from the analog video signal; a DLL circuit for generating a second clock signal on the basis of a composite synchronous signal acquired from the analog video signal; and a clock selecting portion for selecting and outputting either the first clock signal or the second clock signal on the basis of output of a PLL-dedicated phase comparator.