Surface-acoustic-wave convolver

Details Surface-acoustic-wave convolver Surface-acoustic-wave convolver

1988-10-07

1990-08-21

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313D, 333154, H01L 4108

Patent

active

049509357

ABSTRACT:
A balance-to-unbalance matching network for a surface acoustic wave device is provided in the form of a transmission line wound around a toroidal coil and having a length shorter than 1/4 the wave length at the frequency of induced acoustic waves, to provide an inductance component to cancel the susceptance of the transducer. In one embodiment the lines are would and connected to the magnetically coupled to the core so that magnetic fields are produced in the same direction by means of currents flowing into the line sections.

REFERENCES:
patent: 3942140 (1976-03-01), Laker et al.
patent: 4422000 (1983-12-01), Yamada et al.
patent: 4599587 (1986-07-01), Hartmann et al.
patent: 4625184 (1986-11-01), Niitsuma et al.
patent: 4689586 (1987-08-01), Yamada et al.
patent: 4727275 (1988-02-01), Milsom
patent: 4799029 (1989-01-01), Minomo

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