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. 01, 1981
Filed:
Jun. 02, 1980
Applicant:
Inventors:
Shin Fukuda, Hirakata, JP;
Masayoshi Hirashima, Ibaraki, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04L / ; H03B / ; H03K / ;
U.S. Cl.
CPC ...
358147 ; 375113 ; 328138 ; 328139 ;
Abstract
Improved sampling clock reproducing apparatus for receiving digital signal which is superimposed in the television signal during a vertical blanking interval. The sampling clock signal is made by selectively gating a pilot signal from the superimposed signal, obtaining a square thereof, then passing it through a resonance circuit with a resonance frequency twice a repetition frequency of the pilot signal. Thus, the sampling clock signal of the frequency twice the repetition frequency of the pilot signal is obtainable without digital processing attaining high durability against noises.