Title :
Tunable high-Q surface-wave comb filter
Author :
Cho, F.Y. ; Hunsinger, Bill J.
Abstract :
Comb filters with tunable passband characteristics have been achieved using a muItitap surface-wave delay line with electronic phase-shifting circuits in the feedback loop. The results are obtained either by summing the acoustic signals on the substrate or by using electronic summers. Q´s ranging from 500 to 50 000 have been measured for the surface-wave comb filters.
Keywords :
Acoustic measurements; Acoustic waves; Adders; Feedback; Filters; Frequency; Passband; Phase shifters; Surface acoustic waves; Tunable circuits and devices;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1971.8493