Periodic waveform interference eliminator

Details Periodic waveform interference eliminator Periodic waveform interference eliminator

1976-04-19

1977-11-22

Wilbur, Maynard R.

Communications: electrical

Selective

Having electron beam device

340 155F, 340 155CF, 328165, G01V 136, H03B 104

Patent

active

040598187

ABSTRACT:
A system is disclosed for removing a periodic interfering signal from an electrical signal which may also include a data signal such as a seismic signal. A digital representation of the interfering signal, comprising a series of digital words, is generated and a nulling signal formed from this digital signal is subtracted from said electrical signal. The amplitude difference between said electrical signal and the nulling signal is determined and the digital words comprising the digital representation of the interfering signal are changed by a function of the difference between said electrical signal and said nulling signal, to reduce said difference.

REFERENCES:
patent: 3696203 (1972-10-01), Leonard
patent: 3757235 (1973-09-01), McCormick et al.
patent: 3889229 (1975-06-01), Kostelnicek et al.
patent: 3894219 (1975-07-01), Weigel

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