Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1990-03-23
1992-05-26
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310313A, 310313D, H01L 4108
Patent
active
051171457
ABSTRACT:
Disclosed is a surface-acoustic-wave convolver having a toroidal coil connected to each interdigital electrode as a matching and balanced-to-unbalanced converting circuit. The use of the toroidal coil wound on an associated toroidal core permits the reduction of required parts in number thanks to its dual function, and accordingly reduction of manufacturing cost and size of the device. Still advantageously the use of such a toroidal winding permits the suppression of spurious or noise signals in an SAW device.
REFERENCES:
patent: 3950935 (1990-08-01), Furukawa
Budd Mark O.
Clarion Co. Ltd.
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