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US 4,900,969 AGranted
Surface acoustic wave convolver
AssigneeClarion Co., Ltd.
InventorsSyuichi Mitsutsuka, Takeshi Okamoto
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Abstract
A SAW convolver is disclosed, in which an auxiliary electrode is disposed between the gate electrode and each of two input electrodes and self convolution is reduced by applying to the auxiliary electrodes such a bias voltage that the portion of the semiconductor layer below each auxiliary electrode is inverted.
Claims12
A surface acoustic wave convolver, comprising:
- a multi-layered structure which includes a piezoelectric layer and includes a semiconductor layer having a surface;
- a pair of spaced input electrodes disposed on said piezoelectric layer;
- a gate electrode which is disposed along a propagation path of surface acoustic waves in said piezoelectric layer at a location between said input electrodes and which extracts convolution signals from said convolver;
- two auxiliary electrodes each disposed between said gate electrode and a respective one of said input electrodes;
- and
- means for applying to each said auxiliary electrode a bias voltage which causes portions of said surface of said semiconductor layer located below said auxiliary electrodes to be in an inverted state.
3 more elements
Dependencies are inferred from the claim text.