Digitally controlled analog RF filtering in subsampling...

Details Digitally controlled analog RF filtering in subsampling... Digitally controlled analog RF filtering in subsampling...

2006-07-18

2006-07-18

Beamer, Temica (Department: 2681)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S257000, C455S118000, C455S137000

Reexamination Certificate

active

07079826

ABSTRACT:
A first periodic voltage waveform (20) is downconverted into a second periodic voltage waveform (35, 36). A plurality of temporally distinct samples (SA1, SA2, . . . ) respectively indicative of areas under corresponding half-cycles of the first voltage waveform are obtained. The samples are combined to produce the second voltage waveform, and are also manipulated to implement a filtering operation such that the second voltage waveform represents a downconverted, filtered version of the first voltage waveform.

REFERENCES:
patent: 5162723 (1992-11-01), Marzalek et al.
patent: 5697078 (1997-12-01), Peterson et al.
patent: 6005506 (1999-12-01), Bazarjani et al.
patent: 6294896 (2001-09-01), Champlin
patent: 6678709 (2004-01-01), Gandhi et al.
Copending U.S. Appl. No. 09/828,338, filed Apr. 6, 2001.
Copending U.S. Appl. No. 09/850,435, filed May 7, 2001.

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