Acoustic storage device for the correlation in particular of two high frequency signals

Claim 1

An acoustic device for high frequency signals, constituted by a network of cells each made up of a capacitor and a semiconductor diode in series with one another, said diode being formed by an insulated electrode applied to one of the faces of a semiconductor and placed between two electrodes the first of which is applied directly on that face of said semiconductor which is opposite to the one on which the insulated electrode is applied, and the second of which is applied to a layer of an electrically insulating material arranged opposite said insulated electrode and opposite that face of said semiconductor to which said electrode is applied, said insulated electrode and said second electrode constituting the electrodes of said capacitor, said acoustic device being characterised in that it furthermore comprises a piezoelectric body and transducers applied to one of the faces thereof, from which transducers acoustic surface waves propagate when high frequency signals are applied to their terminals; in that said insulated electrodes of said network of diodes are distributed in the direction of propagation of said surface acoustic waves generated by said transducers at the face of said piezoelectric body; and in that said acoustic device comprises means for coupling that face of said piezoelectric body on which said acoustic waves propagate, to said insulated electrodes of said diodes of the network, as well as means for successively connecting between said first and second electrodes after the appearance of a first high frequency signal at one of said transducers, a source of voltage pulses which charge up said capacitors, and a load, said device ensuring that there is picked off across said load, during the whole of the time of the discharge of said capacitors, a signal resulting from the superimposition of the first signal and a second signal applied to one of said transducers after the application of said pulse.