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US 2010/0141336 A1Published application
Selectable intermediate frequency demodulator
AssigneeBeken Corporation
InventorsPengfei Zhang, Dawei Guo
Life of this patent
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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.
Claims20
An apparatus for demodulating a signal, comprising:
- a front end module configured to receive an input signal and to provide a mixed signal by mixing the input signal with an oscillating signal;
- a filter configured to receive the mixed signal and to provide a filtered signal by filtering the mixed signal, wherein at least one characteristic of the filter is selectable based on a filter control signal;
- and
- a phase lock loop (PLL) configured to receive the filtered signal and to demodulate an output signal from the filtered signal.
1 more element
A method of demodulating a signal, comprising:
- providing a mixed signal by mixing an input signal with an oscillating signal;
- providing a filtered signal by filtering the mixed signal, wherein the filtering is based on at least one filter characteristic that is selectable based on a filter control signal;
- and
- demodulating an output signal from the filtered signal.
1 more element
An apparatus for demodulating a signal, comprising:
- first means for providing a mixed signal by mixing an input signal with an oscillating signal;
- second means for providing a filtered signal by filtering the mixed signal, wherein the filtering is based on at least one filter characteristic that is selectable based on a filter control signal;
- and
- third means for demodulating an output signal from the filtered signal.
1 more element
Dependencies are inferred from the claim text.