Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate
2008-07-01
2008-07-01
Dougherty, Thomas M (Department: 2834)
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
C310S31300R, C331S155000
Reexamination Certificate
active
10595317
ABSTRACT:
A surface-acoustic-wave-sensor-included oscillator circuit does not cause separation of an electrode film due to application of a bias voltage and can reliably accurate operate even if liquid is adhered thereto. The surface-acoustic-wave-sensor-included oscillator circuit includes interdigital electrode disposed on a piezoelectric substrate and a reaction film that is arranged so as to cover the interdigital electrodes and bound to a target substance or a binding material to be bound to the target substance. A surface acoustic wave sensor that is capable of detecting a bit of mass loading on the basis of a variation in frequency is connected as a resonator in the surface-acoustic-wave-sensor-included oscillator circuit. Direct-current cutting capacitors are connected in series to the surface acoustic wave sensor, and the direct-current cutting capacitors respectively define impedance matching circuits in the surface-acoustic-wave-sensor-included oscillator circuit.
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Official communication issued in the counterpart Chinese Application No. 200480032329.0, mailed on May 25, 2007.
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Official communication issued in counterpart Chinese Application No. 200480032329.0, issued on Mar. 14, 2008.
Fujimoto Koji
Kadota Michio
Okaguchi Kenjiro
Dougherty Thomas M
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
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