Piezoelectric transformer driver circuit

Details Piezoelectric transformer driver circuit Piezoelectric transformer driver circuit

1996-08-26

1998-06-02

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327304, H03B 100

Patent

active

057606196

ABSTRACT:
A piezoelectric transformer driver circuit can employ low voltage transistors. By alternately turning ON and OFF switching transistors b 3 and 4 depending upon gate signals GA and GB, a primary side of a piezoelectric transformer 7 is driven, and a secondary side is connected to a load 8. Inductors 1 and 2 are provided corresponding to transistors 3 and 4 for supplying a power source to corresponding transistors. Capacitors 10 and 11 respectively connected to one of the electrode of the inductors 1 and 2, respectively. The transistor 12 is turned ON upon completion of ON/OFF operation of the transistors 3 and 4, and the capacitors 10 and 11 are situated the other electrode at the ground voltage. Upon completion of ON/OFF operation of the transistor, a surge voltage to be generated by the inductors 1 and 2 can be restricted to permit use of the low voltage transistor. Thus, the overall circuit can be compact and low cost.

REFERENCES:
patent: 3213295 (1965-10-01), Etal
patent: 3770986 (1973-11-01), Drehle
patent: 5304863 (1994-04-01), Cargille
patent: 5414309 (1995-05-01), Ichikawa et al.
patent: 5548189 (1996-08-01), Williams

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