Registers – Transfer mechanism – Traveling pawl
Patent
1974-11-05
1976-09-21
Gruber, Felix D.
Registers
Transfer mechanism
Traveling pawl
235197, 333 30R, 333 72, G06G 719, H03H 924
Patent
active
039821137
ABSTRACT:
A pair of radio frequency (RF) input acoustic surface waves, of acoustic frequencies f.sub.1 and f.sub.2 traveling in opposite (.+-. z) directions, mutually nonlinearly interact acoustoelectronically along a layered structure of semiconductor-dielectric-electrode in which the dielectric layer includes a piezoelectric film. The dielectric layer advantageously contains a predetermined spatially varying pattern of trapped electrical charges, in accordance with a desired information storage pattern, along the z direction. The envelope of the RF voltage response across the structure is a functional representation (memory scan, convolution, correlation, or transform) of the information storage pattern, the type of functional relationship depending upon the envelopes of the RF input acoustic waves. In particular, if one RF input is a very narrow pulse while the other RF input is a continuous signal, then the output signal directly represents as a function of time the spatially varying pattern of trapped electrical charges (memory scan).
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Bell Telephone Laboratories Incorporated
Caplan D. I.
Gruber Felix D.
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