Hybrid FET/SAW Programmable Transversal Filter

A programmable transversal filter is described which employs hybrid tap weight circuitry to produce continuously adjustable tap weight magnitude and sign. The breadboard consists of a LiNb0/ sub 3/ surface acoustic wave device utilizing a wideband 250 MHz input IDT and a 16 tap (200 MHz) output elec...

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Bibliographic Details
Main Author: Panasik, C.M.
Format: Conference Proceeding
Language:English
Subjects:
Acoustic arrays
Acoustic waves
Circuits
Electrodes
FETs
Sampling methods
Surface acoustic wave devices
Surface acoustic waves
Transversal filters
Wideband
Online Access:Request full text
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Description
Summary:A programmable transversal filter is described which employs hybrid tap weight circuitry to produce continuously adjustable tap weight magnitude and sign. The breadboard consists of a LiNb0/ sub 3/ surface acoustic wave device utilizing a wideband 250 MHz input IDT and a 16 tap (200 MHz) output electrode array and associated electronics. A novel sampling technique allows the output array to function from 200 to 300 MHz. Programmable tap weight changes over greater than 40 dB and at a 9 MHz rate have been demonstrated. Experimental results are compared with theoretical analyses of loss mechanisms and filter response capabilities.
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.1982.1130605