Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1998-01-28
1999-12-28
Dougherty, Thomas M.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
H01L 41107
Patent
active
060085649
ABSTRACT:
The present invention provides a driving circuit for a piezoelectric transformer. The driving circuit comprises a driver circuit and a detector circuit. The driver circuit is electrically connected to a primary side of the piezoelectric transformer for generating a driving signal which is transmitted to the primary side of the piezoelectric transformer so that the piezoelectric transformer exhibits a vibration due to piezoelectric effect and generates a transformed output voltage on a secondary side thereof. The detector circuit is electrically connected to an output side of the driver circuit for receipt of the driving signal from the driver circuit and also electrically connected to the secondary side of the piezoelectric transformer for receipt of the transformed output voltage from the piezoelectric transformer so that the detector circuit is capable of detecting a drop of the transformed output voltage when a voltage level of the driving signal is in an available range.
REFERENCES:
patent: 5731652 (1998-03-01), Shimada
patent: 5739622 (1998-04-01), Zaitsu
patent: 5796213 (1998-08-01), Kawasaki
patent: 5854543 (1998-12-01), Satoh et al.
patent: 5872419 (1999-02-01), Hall et al.
Furuhashi Naoki
Kawashima Shingo
Takayoshi Hirokazu
Dougherty Thomas M.
NEC Corporation
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