Digital pulse filtering circuit

Details Digital pulse filtering circuit Digital pulse filtering circuit

1997-09-10

2000-05-16

Pham, Chi H.

Pulse or digital communications

Receivers

Interference or noise reduction

375346, 327 33, H04B 110, H03D 104, G01R 2902

Patent

active

060647043

ABSTRACT:
A digital pulse filtering circuit for filtering out pulses of specific pulse widths in a composite signal is provided. The digital pulse filtering circuit includes a sampling circuit for sampling the input composite signal based on a periodic clock signal to thereby generate a plurality of sampled signals of the input composite signal. In response to these sampled signals, a detection circuit outputs a low-frequency composite signal which is a filtered version of the input composite signal. The digital pulse filtering circuit is completely based on digital circuitry which can be built in integrated circuits. The cutoff frequency of the digital pulse filtering circuit is dependent on the frequency of the clock signal, which is very easy and accurate to adjust.

REFERENCES:
patent: 4843307 (1989-06-01), Ichijyo
patent: 5243630 (1993-09-01), Rhebergen
patent: 5452333 (1995-09-01), Guo et al.
patent: 5457718 (1995-10-01), Anderson et al.
patent: 5666387 (1997-09-01), Tamamura et al.
patent: 5726593 (1998-03-01), Ruuskanen
Amin R. Ismail et al "Digital Concepts and Applications" Sauders College Publishing--pp. 286-288, 1994.

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