Title :
ACT quadrature mirror filter banks
Author :
Miller, R.L. ; Bailey, D.S.
Author_Institution :
Westinghouse Electron. Syst. Group, Baltimore, MD, USA
Abstract :
The authors demonstrate a single ACT (acoustic charge transport) device which comprises a three-filter QMF (quadrature mirror filter) with center frequencies of 0 MHz (baseband), 14.2 MHz, and 23.6 MHz, and bandwidths of 9.45 MHz each. This filter bank produces a digital processing power of 9 billion digital operations per second. Theoretical and experimental data are presented. In addition, a simple technique that simultaneously reduces the baseband response and the output capacitance of the device and is suitable for both voltage sense and current sense designs is presented. The low capacitance voltage sense version has a 10 dB reduction in the baseband response and a 15 dB improvement in output capacitance
Keywords :
acoustic signal processing; acoustoelectric devices; digital filters; surface acoustic wave filters; ultrasonic delay lines; 14.2 MHz; 23.6 MHz; 9.45 MHz; ACT quadrature mirror filter banks; acoustic charge transport; baseband response; current sense; digital processing power; output capacitance; proton isolated ACT technology; voltage sense; Bandwidth; Baseband; Capacitance; Channel bank filters; Electrodes; Filter bank; Frequency; Mirrors; Shape; Transversal filters;
Conference_Titel :
Ultrasonics Symposium, 1990. Proceedings., IEEE 1990
Conference_Location :
Honolulu, HI
DOI :
10.1109/ULTSYM.1990.171359
