Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1995-01-10
1996-12-03
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
H01L 4108
Patent
active
055811426
ABSTRACT:
A vibration control apparatus capable of setting the frequency of self-oscillating or self-induced vibration of an oscillator to a frequency in near agreement with the mechanical series resonance frequency f.sub.s is provided. The apparatus comprises a vibrator having a single piezo-electric element on the side surface of a vibrator member having a resonance point, drive apparatus having signal output terminal that outputs the drive signal of vibrator, and feedback amplifier having signal input terminal and feedback input terminal. The signal input terminal of feedback amplifier is connected to signal output terminal of drive apparatus. The feedback input terminal is connected to one electrode of piezo-electric element. The other electrode of piezo-electric element is connected to ground.
REFERENCES:
patent: 5270607 (1993-12-01), Terajima
patent: 5412204 (1995-05-01), Nakamura
patent: 5434467 (1995-07-01), Abe et al.
patent: 5455476 (1995-10-01), Nakamura
patent: 5473288 (1995-12-01), Kumada
"Basic Circuit Design Techniques Yield Stable Clock Oscillators", J. Williams, E.D.N. Electrical Design News, vol. 28, No. 17, Aug., 1983, pp. 165-175.
Akai Electric Co. Ltd.
Budd Mark O.
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