Digitally calibrated narrowband filter with analog channel...

Details Digitally calibrated narrowband filter with analog channel... Digitally calibrated narrowband filter with analog channel...

2006-05-30

2006-05-30

Gelin, Jean (Department: 2688)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S187100, C455S213000, C455S113000

Reexamination Certificate

active

07054606

ABSTRACT:
An apparatus comprising a first circuit, a second circuit and a third circuit. The first circuit may be configured to filter an analog input signal in an analog domain in response to one or more control signals. The second circuit may be configured to convert the analog input signal to a digital signal. The third circuit may be configured to generate the control signals in response to the digital signal. The third circuit may also be configured to control skewing of the analog input signal within the first circuit to partially compensate for frequency dependent effects associated with a transmission medium.

REFERENCES:
patent: 4685150 (1987-08-01), Maier
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patent: 5822687 (1998-10-01), Bickley et al.
patent: 5940441 (1999-08-01), Cranford et al.
patent: 5987314 (1999-11-01), Saito
patent: 6002717 (1999-12-01), Gaudet
patent: 6032028 (2000-02-01), Dickey et al.
patent: 6055269 (2000-04-01), Drost et al.
patent: 6823028 (2004-11-01), Phanse

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