Noise filter and filtering method

Details Noise filter and filtering method Noise filter and filtering method

2005-12-19

2010-06-08

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S229000, C375S278000, C375S284000, C375S253000, C375S254000, C455S213000, C370S290000

Reexamination Certificate

active

07733995

ABSTRACT:
A noise filter, used for a digital signal, configuring an [N−1]-stage filter by connecting the N-number of flip flops in series comprises a selection unit for outputting a filter output signal by selecting one of signals filtered by one to (N−1) stages based on a selection signals; and a wave form check unit for making the selection unit change a selection thereby by changing a value of the selection signal based on a pulse width on the filter output signal which is output from the selection unit.

REFERENCES:
patent: 3593162 (1971-07-01), Patmore
patent: 5698984 (1997-12-01), Little et al.
patent: 5968194 (1999-10-01), Wu et al.
patent: 7174502 (2007-02-01), Miyamoto
patent: 2004/0128579 (2004-07-01), Khondker et al.
patent: 11-041298 (1999-02-01), None
patent: 2003-247453 (2003-09-01), None

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