Isolated gate, programmable internal mixing saw signal processor

Details Isolated gate, programmable internal mixing saw signal processor Isolated gate, programmable internal mixing saw signal processor

1980-11-03

1982-05-04

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Delay lines including elastic surface wave propagation means

333166, 333196, H03H 964, H03H 976, H03H 1500

Patent

active

043284736

ABSTRACT:
A SAW signal processor (20) includes a plurality of FET taps (30-32) having individually programmable source-drain bias (42-44) which controls both the amplitude and phase of the mixing efficiency of internal product mixing of the waves passing beneath the tap, in dependence upon the amplitude and polarity of the bias, the sources (34) of the taps may be interconnected so as to provide a summation of correlation at the output (40). The gates (35) of each of the taps are ohmically isolated, thereby to mitigate intertap interaction. The invention is a direct improvement over U.S. Pat. No. 4,207,546.

REFERENCES:
patent: 3691406 (1972-09-01), Mize
patent: 4065736 (1977-12-01), London
patent: 4207546 (1980-06-01), Grudkowski
patent: 4233573 (1980-11-01), Grudkowski

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