Data processing filtering method and apparatus

Details Data processing filtering method and apparatus Data processing filtering method and apparatus

1985-03-15

1988-03-08

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Land-reflection type

367 83, G01V 128

Patent

active

047302810

ABSTRACT:
A bucket brigade filter is disclosed having a feedback loop resulting in a tight comb structure filter response whereby a periodic noise and all its harmonics may be removed from a signal. Scalers featuring selectively variable scaler parameters permit prompt adaptation to changes in the noise period, rapid initialization of the filter to an operating condition and adjustable stopband widths of the filter frequency response. Sampling of the input data signal may be synchronized to the periodic variations of the noise to be eliminated from the signal.

REFERENCES:
patent: 3275978 (1966-09-01), Shanks
patent: 3303335 (1967-02-01), Pryor
patent: 3307190 (1967-02-01), Clay, Jr. et al.
patent: 3417837 (1968-12-01), Flanagan
patent: 3521042 (1970-07-01), Blerkom et al.
patent: 3609672 (1971-09-01), Bossert
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patent: 3742443 (1973-06-01), Foster et al.
patent: 3867712 (1975-02-01), Harthill et al.
patent: 3889108 (1975-06-01), Cantrell
patent: 3894219 (1975-07-01), Weigel
patent: 4078620 (1978-03-01), Westlake et al.
patent: 4166979 (1979-09-01), Waggener
patent: 4207624 (1980-06-01), Dentino et al.
patent: 4254481 (1981-03-01), Smither et al.
Bucket Brigade Devices Circa 1977, Application Notes No. 107, EG&G Reticon of Sunnyvale, Calif., pp. 1-18, 1978.
Build a Simple Comb-Filter Phaser or Flanger with a Bucket Brigade Delay Line, Application Notes No. 113, EG&G Reticon of Sunnyvale, Calif., pp. 1 and 2, 1978.

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