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. 13, 2007
Filed:
Mar. 31, 2004
Ti-wen Yuan, Hsin-Chu, TW;
Ti-Wen Yuan, Hsin-Chu, TW;
MediaTek Inc., Hsin-Chu, TW;
Abstract
An automatic frequency control (AFC) system applies in a mobile station for automatically controlling a local frequency signal to be substantially synchronized with an input signal which is a first received signal Sfrom a base station, and for being capable of shifting the frequency of the local frequency signal to be close to that of a second received signal Sfrom another base station when the input signal is changed from the first received signal Sto the second received signal S. The AFC system comprises a control module, a memory unit, and an automatic frequency controller. The memory unit stores a plurality of AFC parameter sets; each AFC parameter set corresponds to a base station within the wireless cellular system. When the input signal Sis changed from the first received signal Sto the second received signal S, the control module fetches the AFC parameter set, which corresponds to the second base station, from the memory unit; it then applies the fetched AFC parameter set, which corresponds to the second base station, to the automatic frequency controller to shift the frequency of the local frequency signal fto be close to that of the second received signal Sfrom another base station.