Title: Elastic waves device for memorizing information

Abstract: A device for memorizing information by means of interactions between elastic waves and electromagnetic waves. It comprises a piezoelectric substrate, at least one electromechanical transducer receiving the information to be memorized, means for exciting a pulsating electric field through the substrate, said field interacting non-linearly with the elastic wave created by the transducer to form a spatial charge pattern representing said information and means for modifying the physical properties of the medium of propagation of the elastic waves in the region of said pattern, for memorizing. The reading is effected by a non-linear interaction between said pattern and the pulsating electric field.

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Inventors: Tournois, Pierre (Paris, FR)
Maerfeld, Charles (Paris, FR)

Application Number: 875081
Filing Date: 1978-02-03
Publication_date: 1979-06-26
Assignee: Thomson-CSF (Paris, FR)
Primary Class(es): 365/157 365/189.01
Other Classes:
US Patent Ref:

2863076	Dec, 1958	Koren	365/157.
3132257	May, 1964	Yando	365/157.
3320596	May, 1967	Smith	365/157.
3448437	Jun, 1969	Barnett	365/157.
3492667	Jan, 1970	Gratian	365/157.
3564515	Feb, 1971	Gratian	365/157.
3701147	Oct, 1972	Whitehouse	365/157.
3886527	May, 1975	Bert et al.	365/157.
3921154	Nov, 1975	Barkley	365/157.

Other Refs:
Primary Examiner: Fears, Terrell W.
Assistant Examiner:
Attorney: Cushman, Darby & Cushman