Phase and amplitude programmable internal mixing saw signal...

Details Phase and amplitude programmable internal mixing saw signal... Phase and amplitude programmable internal mixing saw signal...

H - Electricity

03

H

333/51

H03H 9/54 (2006.01) G06G 7/195 (2006.01)

Patent

CA 1137182

ABSTRACT A SAW signal processor includes a plurality of FET taps having individually programmable source-drain bias which controls both the amplitude and the phase of the mixing efficiency of internal product mixing of waves passing be- neath the tap, in dependence upon the amplitude and polarity of the bias, the gates of the FETs may be interconnected so as to provide a summation of correlation at the output. Embodiments include multi-FET taps formed on substrates that are both semiconductive and piezoelectric, such as n-type epitaxial gallium aresenide, and ZnO coated silicon. Simple biphase and weighted biphase of phase-shifted tap pairs, for complete phase control, are disclosed.

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