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:
May. 10, 2011
Filed:
Nov. 19, 2007
Chiew Mun Chang, Singapore, SG;
Hong LI, Singapore, SG;
Chiew Mun Chang, Singapore, SG;
Hong Li, Singapore, SG;
Thomson Licensing, Boulogne-Billancourt, FR;
Abstract
The method according to the invention for adjusting the tuning of a receiver circuit for receiving modulated a high frequency signal within a frequency range, the high frequency signal comprising a sync signal, uses the steps of shifting a frequency of a local oscillator within the frequency range and looking for the sync signal, and storing the value of a first frequency, when a sync signal is recognized. Then, the frequency of the local oscillator is continuously shifted in the same frequency direction across the bandwidth of the modulated high frequency signal by controlling the presence of the sync signal. The frequency, at which the sync signal is lost, is stored as a second frequency. From the first and the second frequency in a further step an optimum tuning frequency, located between the first and second frequency, is calculated for the reception for the high frequency signal. The receiver circuit comprises in particular a sync signal detector coupled to an output of an intermediate frequency filter and a controller circuit coupled to the sync signal detector and a local oscillator for performing the method.