Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Reexamination Certificate
2006-12-12
2006-12-12
Trinh, Sonny (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
C455S323000, C455S130000, C455S165100
Reexamination Certificate
active
07149485
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.
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Busson Pierre
Paille Bruno
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Jorgenson Lisa K.
STMicroelectronics SA
Trinh Sonny
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