Actuating circuit of piezoelectric transformer and actuating met

Details Actuating circuit of piezoelectric transformer and actuating met Actuating circuit of piezoelectric transformer and actuating met

1997-10-23

1999-02-02

Nguyen, Matthew

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

058669698

ABSTRACT:
An actuating circuit of a piezoelectric transformer which is small in thickness and size and has a wide input voltage range is developed. In the actuating circuit of the piezoelectric transformer, when a sine wave outputted from a AGC circuit is input to a delta-sigma modulator, the sine wave switches output driver and switches a second output driver through an invertor with a 1-bit quantized bit signal so as to generate a pulse signal having an amplitude of power supply voltage Vdd from the GND potential. Actuating waves output from the output drivers and are applied to 1 piezoelectric transformer extracting resonance frequency of a piezoelectric transformer through a filtering effect provided with an input capacitance of the piezoelectric transformer and coil converting the 1-bit quantized bit signal into a sine wave. Consequently, since the piezoelectric transformer can be operated with the sine wave, the piezoelectric transformer can be actuated efficiently.

REFERENCES:
patent: 5329200 (1994-07-01), Zaitsu
patent: 5654605 (1997-08-01), Kawashima
patent: 5705877 (1998-01-01), Shimada

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