Title :
Acoustic charge transport digitally programmable transversal filter development
Author :
Miller, R.W. ; Kansy, R.J.
Author_Institution :
Electron. Decisions Inc., Urbana, IL, USA
Abstract :
A monolithic 128-tap digitally programmable analog transversal filter is described that uses an acoustic charge transport tapped delay line and integrated GaAs MESFET circuits for coefficient storage and tap weighting. The device has 5-b tap weights, an input sampling rate of 360 MHz, and an output tap spacing corresponding to an output sampling rate of 180 MHz. The device is mounted on a ceramic thick-film substrate along with RF input and output amplifiers, and the entire assembly is housed in a 1.25-in/sup 2/ 44-pin kovar flatpack.<>
Keywords :
hybrid integrated circuits; monolithic integrated circuits; radiofrequency filters; surface acoustic wave filters; thick film circuits; 180 MHz; 360 MHz; GaAs; acoustic charge transport; ceramic thick-film substrate; coefficient storage; digitally programmable; input sampling rate; integrated GaAs MESFET circuits; kovar flatpack; output sampling rate; tap weighting; tapped delay line; transversal filter development; Acoustic devices; Assembly; Ceramics; Delay lines; Gallium arsenide; MESFET circuits; Radio frequency; Radiofrequency amplifiers; Sampling methods; Transversal filters;
Conference_Titel :
Microwave Symposium Digest, 1990., IEEE MTT-S International
Conference_Location :
Dallas, TX
DOI :
10.1109/MWSYM.1990.99774
