ELASTIC SURFACE WAVE RECURSIVE FILTER

摘要

An elastic surface wave recursive filter comprising: at least one delay line formed by two elastic surface wave transducers, such line being looped on itself externally by an amplifier, an extra transducer for introducing an elastic surface wave into such line, such extra transducer being connected to an input of the filter, and another transducer having the form of a transversal filter, and being coupled to the line and connected to an output of the filter. The transfer function of the filter is the form , the numerator and the denominator being independent.