Piezoelectric transformer driving circuit

Details Piezoelectric transformer driving circuit Piezoelectric transformer driving circuit

1996-10-15

1998-01-06

Nguyen, Matthew V.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

057058776

ABSTRACT:
A piezoelectric transformer driving circuit includes a boosting circuit receiving an input DC voltage to generate an AC voltage for driving a piezoelectric transformer, a frequency control circuit for controlling the frequency of the AC voltage applied to the piezoelectric transformer to control a step-up ratio of the piezoelectric transformer, and a drive voltage control circuit for controlling the voltage of the AC voltage applied to the piezoelectric transformer at a predetermined level, regardless of variation of the input DC voltage.

REFERENCES:
patent: 3778648 (1973-12-01), Kawada
patent: 4054936 (1977-10-01), Ansai et al.
patent: 5329200 (1994-07-01), Zaitsu
patent: 5424935 (1995-06-01), Wu
Tagami et al., "Color-LCD Backlight Inverter Utilizing Piezoelectric Ceramic Transformer", Society for Information Display, 1995 International Symposium, Seminar and Exhibition, May 21-26, 1995, pp. 1-5.
Kawashima et al., "Third Order Longitudinal Mode Piezoelectric Ceramic Transformer and Its Application to High-Voltage Power Inverter", 1994 IEEE International Ultrasonics Symposium, Nov. 1-4, 1994, pp. 1-12.

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