Piezoelectric sensor with FET amplified output

Details Piezoelectric sensor with FET amplified output Piezoelectric sensor with FET amplified output

1987-10-09

1989-03-28

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310329, 310338, H01L 4108

Patent

active

048167134

ABSTRACT:
A sensor is disclosed herein employing a high-sensitivity, high-resolution piezoelectric device for converting physical forces into an electrical signal. An electrical feedback circuit is utilized to cancel the capacitance of piezoelectric crystals so as to provide voltage gain with little increase in noise level. The circuit includes a unity gain amplifier outputting only pure signal gain resulting in an increase in resolution as well as in signal output.

REFERENCES:
patent: 3322980 (1967-05-01), Faure
patent: 3389276 (1968-06-01), Gradin et al.
patent: 3390286 (1968-06-01), Gradin et al.
patent: 3400284 (1968-09-01), Elazar
patent: 3601712 (1971-08-01), Elazar
patent: 4460842 (1984-07-01), Waanders
patent: 4499566 (1985-02-01), Abbott
patent: 4637246 (1987-01-01), Lombard et al.

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