Piezoelectric transformer producing an output A.C. voltage with

Details Piezoelectric transformer producing an output A.C. voltage with Piezoelectric transformer producing an output A.C. voltage with

1993-05-06

1994-12-06

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310366, H01L 4108

Patent

active

053714300

ABSTRACT:
A piezoelectric transformer comprises a piezoelectric substrate carrying thereon an input electrode structure provided on an upper major surface of the piezoelectric substrate for receiving an a.c. voltage for causing an excitation of an elastic wave in the substrate such that the elastic wave propagates through the substrate in a longitudinal direction, an output electrode structure provided on a lower major surface of the piezoelectric substrate for producing an output a.c. voltage by converting the elastic wave into an electric voltage, wherein the input electrode structure and the output electrode structure have a periodical structure in the longitudinal direction with a pitch corresponding to a wavelength of the elastic wave, and wherein at least one of the first and second electrode structures extend in the longitudinal direction from the first longitudinal edge to the second longitudinal edge substantially continuously.

REFERENCES:
patent: 2194539 (1940-03-01), Barry et al.
patent: 2323610 (1943-07-01), Koch
patent: 3334307 (1967-08-01), Blum
patent: 3343105 (1967-09-01), Van Der Pauw
patent: 3487239 (1969-12-01), Schafft
patent: 3537039 (1970-10-01), Schafft
patent: 3657578 (1972-04-01), Inoue
patent: 3680009 (1972-07-01), Slobodnik, Jr.
patent: 3736446 (1973-05-01), Berlincourt et al.
patent: 3764848 (1973-10-01), Berlincourt
patent: 3790826 (1974-02-01), Kawada
patent: 4419598 (1983-12-01), Spitz et al.
patent: 4581556 (1986-04-01), Yamamoto
patent: 4604543 (1986-08-01), Umemura et al.
patent: 4692654 (1987-09-01), Umemura et al.
patent: 5229680 (1993-07-01), Sato et al.
Patent Abstracts of Japan, vol. 6, No. 247 (E-146) Dec. 7, 1982 & JP-A-57 147288 (Nippon Denki KK) Sep. 11, 1982.
Patent Abstracts of Japan, vol. 12, No. 486 (E-695) Dec. 19, 1988 & JP-A-63 200579 (NGK Spark Plub Co) Aug. 18, 1988.
K. Nakamura et al., "Piezzoelectric Transformers Using Single Crystals of LiNbO.sub.3," published on Mar. 28, 1990, pp. 687-688.
P. A. van Berkum et al., "High Voltage Ceramic Transformers," IRE Transactions of BTR, 8-1, 1962-03, pp. 22-35.
H. Tominaga et al., "Devices Using High-Coupling Piezoelectric Crystals," Fujitsu Sci. Tech. J., 24, 2, Jun. 1988, pp. 71-99.
H. Watanabe et al., "Energy Trapping of Higher-Harmonic Width Vibrations in Piezoelectric Strips and Its Application to Filters," Trans IEICE, vol. J71-A, No. 8, Aug. 1988, pp. 1489-1498.

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