Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1978-10-03
1980-09-30
Sloyan, Thomas J.
Communications: electrical
Audible indication
Percussion-type sound producer
307233R, 328140, 333193, 340347M, H03K 1302
Patent
active
042258553
ABSTRACT:
The surface elastic wave device is an integral part of an analog-digital converter with intermediate frequency conversion. It is comprised of the acoustical part of a 4-pole surface elastic wave oscillator, a surface elastic wave reflector with track shifting working as a filter assembly and comprising one supply track and several return tracks having different angular frequencies, the reflector operating as a plurality of filters, and output transducers overlapping the return tracks and connected to detectors producing the digital information. Many types of reflectors and output transducer assemblies are described. The invention is useful with analog-digital converters having medium access times.
REFERENCES:
patent: 3613067 (1971-10-01), Haberle
patent: 4079342 (1978-03-01), Solie
Feldmann et al., A Frequency Sensitive Device for Filter and Channel Bank, Centre National d'Etudes des Telecommunications, France.
Feldmann et al., A New Multistrip Acoustic Surface Wave Filter, 11/1974, IEEE Ultrasonics Symposium, Milwaukee, Wis.
Feldmann et al., An ASW-Filter Using Two Fan-Shaped Multistrip Arrays, 1976 Ultrasonic Symposium Proceedings, IEEE #76 CH1120-5SU.
Feldmann Michel
Le Goff epouse Henaff Jeannine
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