Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1997-06-30
1999-08-03
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310312, 310321, 310316, 310334, H01L 4108
Patent
active
059329530
ABSTRACT:
A method and system for detecting material bound on a surface of a piezoelectric resonator introduces a signal of a constant frequency through the sensing resonator and detects a change in the insertion phase shift of the resonator as a result of the binding of the material being detected on the surface of the resonator. Environmental effects on the measurement are effectively canceled by the use of a reference resonator driven by the same input signal. A multiple-port sensing device is provided which includes thin-film sensing and reference resonators monolithically formed on a substrate.
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Drees Dennis M.
Landin Allen R.
Shanks Howard R.
Van Deusen Richard A.
Budd Mark O.
Iowa State University & Research Foundation, Inc.
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