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. 12, 2006
Filed:
Aug. 17, 2004
Pierre Busson, Grenoble, FR;
Bruno Paille, Saint Aupre, FR;
Pierre Busson, Grenoble, FR;
Bruno Paille, Saint Aupre, FR;
STMicroelectronics SA, Montrouge, FR;
Abstract
In a calibration phase for a tuner of the DZIF type, N calibration frequency signals are generated at an input of a filter. The N calibration frequency signals have N calibration frequencies corresponding respectively after transposition to N analysis frequencies at an input of a Fourier transform. An amplitude and a phase of a corresponding point at an output of the Fourier transform are calculated for each analysis frequency. In a reception phase, each of the outputs of the Fourier transform is corrected with an inverse of the corresponding amplitude and opposite the corresponding phase calculated in the calibration phase.