Patent Document ID: 4134623
Application ID: 05801247
Patent Flag: 1

Claim One:
1. A system for processing an electric signal using elastic surface waves, comprising: a piezoelectric substrate, at least one electromechanical transducer receiving said signal, termed the initial signal, and generating elastic waves on the surface of said substrate, first means for exciting electromagnetic waves corresponding to a second signal, said exciting means comprising two metallic interdigital combs deposited on said surface of said substrate between which combs the electromagnetic wave is produced by application of said second signal, interacting with said elastic waves to form a time-independent spatial potential pattern, representing the correlation function between said initial signal and said second signal, means for fixing said pattern, second means for exciting at least a surface wave corresponding to a third signal, interacting with said pattern to form a further surface wave, termed a resulting wave, which represents a function selected from a group consisting of the convolution and the correlation functions, between said third signal and the signal represented by said pattern.