Elastic surface wave recursive filter

Details Elastic surface wave recursive filter Elastic surface wave recursive filter

1981-05-13

1983-08-09

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

331107A, 331DIG2, 333195, 333196, H03H 925, H03H 964, H03B 532

Patent

active

043981631

ABSTRACT:
An elastic surface wave recursive filter comprising: at least one delay line formed by two elastic surface wave transducers, such line being looped on itself externally by an amplifier, a means for introducing an elastic surface wave into such line, such means being connected to an input of the filter, and a third transducer having the form of a transversal filter, the transducer being coupled to said line and connected to an output of the filter. The transfer function of the filter is the form P(z)/Q(z), the numerator and the denominator being independant.

REFERENCES:
patent: 3845418 (1974-01-01), Weglein
Field et al.-"Surface Acoustic Wave Regenerative Active Resonator", 1977 Ultrasonics Symposium Proceedings, IEEE Cat. #77CH1264-1SU; pp. 909-912.
Field et al.-"Bistable Surface Acoustic Wave Resonators" 1978 Ultrasonic Symposium Proceedings, The Cherry Hill Hyatt House, New Jersey, 25-27 Sep. 1978; pp. 469-173.

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