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:
Nov. 02, 1976
Filed:
Jun. 06, 1975
Anthony Donald Stalley, Fleet, EN;
John Albert Coffey, Newbury, EN;
Quantel Limited, , EN;
Abstract
An input oscillator for use in a digital time base corrector comprising a triggered oscillator circuit and a variable period delay device having a first input for receiving the synchronizing pulse and for producing an output pulse whose back edge coincides approximately in time with the center of the filtered colour burst. A select burst transition device has an input connected to the delay device and an output for triggering the oscillator circuit. A window circuit has an output connected to a second input of the delay device. A pulse former is provided controlled from the trailing edge of the output of the delay device. The bistable window circuit effects change of the delay period of the delay device when the output of the pulse former coincides in the window circuit with a burst transition whereby the trailing edge of the output of the delay device is made to occur between burst transitions.