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:
Dec. 27, 1994
Filed:
Oct. 21, 1993
Applicant:
Inventors:
Osamu Suzuki, Kanagawa, JP;
Seiji Kawahara, Kanagawa, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348735 ; 348536 ;
Abstract
A video detector has a PLL, a bias circuit, a synchronous detector for detecting a video IF signal by using the output of a VCO, and a lock detector for detecting whether the PLL is locked. The PLL has the VCO, a phase comparator, and a low-pass filter. In the video detector the supply of the direct current from the bias circuit is halted while said lock detector detects that the PLL is locked.