Selectable intermediate frequency demodulator

Details Selectable intermediate frequency demodulator Selectable intermediate frequency demodulator

2011-01-04

2011-01-04

Chang, Joseph (Department: 2817)

Demodulators

Frequency modulation demodulator

Input signal combined with local oscillator or carrier...

C455S188100

Reexamination Certificate

active

07863974

ABSTRACT:
A method and apparatus for demodulating an input signal in a selectable intermediate frequency system is disclosed. The apparatus includes a front end module, a filter, and a phase lock loop (PLL). The front end module mixes the input signal with an oscillating signal. The filter includes at least one characteristic that is selectable to configure an intermediate frequency. The PLL demodulates an output frequency based on the output of the filter.

REFERENCES:
patent: 5023939 (1991-06-01), Hori
patent: 5036291 (1991-07-01), Marz
patent: 5691666 (1997-11-01), Owen
patent: 2006/0229052 (2006-10-01), De Ruijter
patent: 2008/0248765 (2008-10-01), Gater
patent: 2008/0290966 (2008-11-01), Darabi et al.

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