Programmable filter

Details Programmable filter Programmable filter

2008-03-04

2008-03-04

Wang, Ted (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S340000, C708S005000, C708S300000, C708S314000, C708S819000

Reexamination Certificate

active

07340019

ABSTRACT:
Briefly, in accordance with one embodiment of the invention, a programmable filter may implement an infinite impulse response filter so that a transceiver in which the filter is utilized may be programmable to operate in one or more modes in accordance with one or more communication standards. The programmable infinite impulse response filter may replace one or more analog filters of the transceiver so that a desired filter response may be programmed by a baseband processor. Delay functions of an infinite impulse response filter may be implemented using feedback and multiplexing.

REFERENCES:
patent: 4295204 (1981-10-01), Sunstein
patent: 6219376 (2001-04-01), Zhodzishsky et al.
patent: 6728517 (2004-04-01), Sugar et al.
patent: 2002/0150174 (2002-10-01), Spiegel et al.
patent: 2002/0198915 (2002-12-01), Rainish
patent: 2004/0071244 (2004-04-01), Shaeffer
patent: 2 123 257 (1984-01-01), None
patent: WO 01/43052 (2001-06-01), None
patent: PCT/US2004/007823 (2004-08-01), None

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