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Programmable phase coded surface wave device

  • US 3,961,290 A
  • Filed: 02/07/1975
  • Issued: 06/01/1976
  • Est. Priority Date: 02/07/1975
  • Status: Expired due to Term
First Claim
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1. An acoustic surface wave programmable processor comprising:

  • substrate means having at least a surface layer of piezoelectric material,means to produce respective first and second acoustic surface waves of opposite phase wherein the second acoustic surface wave is at least substantially the inverse of the first acoustic surface wave in the piezoelectric material of said substrate means and propagating along two distinct paths,a first output transducer array having a plurality of sets of electrode elements on the piezoelectric surface of said substrate means and disposed in the first path for sampling the first acoustic surface wave to be propagated therein at spaced time points corresponding to said sets of electrode elements along said first path,a second output transducer array having a plurality of sets of electrode elements on the piezoelectric surface of said substrate means and disposed in the second path for sampling the second acoustic surface wave to be propagated therein at spaced time points differing from the spaced time points in said first path at which the first acoustic surface wave to be propagated is sampled by said first output transducer array, andmeans operably connected to said first and second output transducer arrays for combining respective electrical output signals from sets of electrode elements at successive time points along said first and second paths from said first and second output transducer arrays.

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