Tracking comb filter includes charge-coupled-device delay line and phase-locked loop. Filter removes harmonics of frequency of repetition of welding-current pulses from acoustic-emission signal. Spurious signals reduced almost to fundamental limit.
Tracking Comb Filter Suppresses Welder Harmonics
NASA Tech Briefs ; 16 , 10
01.10.1992
Sonstige
Keine Angabe
Englisch
NTRS | 1980
|NTRS | 1980
|NTRS | 1979
|NTRS | 1990
|NTRS | 1991
|