Title :
A 3.35 microsecond HACT transversal filter
Author :
Merritt, Sears W. ; Tanski, William J. ; Cullen, Donald E. ; Sacks, Robert N. ; Carroll, Roger D. ; Branciforte, Emilio J.
Author_Institution :
United Technol. Res. Center, East Hartford, CT, USA
Abstract :
A heterojunction acoustic charge transport (HACT) transversal filter with a 3.35-μs integration time is reported. This is the longest acoustic charge transport device reported to date. The device operates at an acoustic clock frequency of 144 MHz and at an acoustic power of 100 mW. The output signal is generated by 480 equally weighted taps. The multiple output tap structure results in the device exhibiting 12 dB of gain when embedded in a 50-Ω system. Measurements of the 1-dB compression point, the third-order intercept, and the noise floor show the dynamic range of the device to be in excess of 80 dB over the 300-kHz bandwidth of the filter
Keywords :
acoustoelectric devices; passive filters; surface acoustic wave filters; 100 mW; 12 dB; 144 MHz; 3.35 mus; 300 kHz; HACT transversal filter; acoustic clock frequency; compression point; heterojunction acoustic charge transport transversal filter; multiple output tap structure; noise floor; third-order intercept; Acoustic devices; Acoustic measurements; Acoustic noise; Clocks; Frequency; Gain; Heterojunctions; Noise measurement; Signal generators; Transversal filters;
Conference_Titel :
Ultrasonics Symposium, 1989. Proceedings., IEEE 1989
Conference_Location :
Montreal, Que.
DOI :
10.1109/ULTSYM.1989.66984
