Miniature digitally controlled programmable transversal filter u

Details Miniature digitally controlled programmable transversal filter u Miniature digitally controlled programmable transversal filter u

1994-03-04

1995-02-07

Issing, Gregory C.

Wave transmission lines and networks

Coupling networks

Time domain filters

333193, 333196, H03H 738, H03H 900, H03H 9205

Patent

active

053878876

ABSTRACT:
A digitally controlled programmable transversal filter (DCPTF) employing a lithium niobate surface acoustic wave (SAW) delay line and two large scale integration (LSI) gallium arsenide integrated circuits to digitally control the magnitude and sign of the 32 tap weights from the delay line. The DCPTF results in a significant reduction in size over the prior art with little sacrifice in performance. The DCPTF is completely programmable and is constrained only by the bandwidth and the number of taps.

REFERENCES:
patent: 3678401 (1972-07-01), Adler
patent: 3979700 (1976-09-01), Groce
patent: 4245330 (1981-01-01), Rebourg
patent: 4734751 (1988-03-01), Hwong et al.
patent: 4752750 (1988-06-01), Zimmerman et al.
Moncrecf, Frank J.; "Monolithic SAW Devices Grown on GaAs for Signal Processing"; Microwaves; vol. 19, No. 2; Feb. 1980; p. 13.
Gianfranco Manes et al.-"A Microprocessor Controlled Transversal Filter Based on a Surface Acoustic Wave Delay Line", Alta Frequenza, vol. 51, No. 3, May-Jun. 1982; pp. 134-142.

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