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:
Jun. 23, 1998
Filed:
Jan. 19, 1996
Shigeto Sakakibara, Daito, JP;
Funai Electric Co., Ltd., Daito, JP;
Abstract
A television signal tuning device having a memory which is adapted to store central frequency data for starting a synchronizing-signal detecting operation for all the channels and frequency division ratio data thereof. In a data presetting operation for each of the channels, a CPU causes a phase-locked loop circuit to perform a phase-locking operation for every data piece of the central frequency data or frequency division ratio data thereof which are stored in the memory for each channel. When the CPU detects a synchronizing signal from a video signal processing circuit in any one of the phase-locking operations which are successively performed by the phase-locked loop circuit, the CPU immediately renews the channel number and the tuning data thereof in the memory without performing the detection of an AFC variation. This feature greatly reduces the period of time required for the data presetting operation for each channel.