Murata Manufacturing Co., Ltd.

Ken Takakura

Takashi Noma

Yohei Mukobata

Shingo Ito

Yasuyuki Morishima

Takahiro Hirao

Haruhiko Ueno

Syuichi Nabekura

Koichi Ikeda

Satoshi Yoshida

Kyosuke Uno

A three-terminal capacitor includes a main body having a cylindrical or substantially cylindrical shape extending in a first direction and including first and second inner electrodes alternately laminated together with dielectric layers interposed therebetween, a pair of first outer electrodes on two end surfaces of the main body in the first direction and electrically connected to the first inner electrodes, and a second outer electrode electrically connected to the second inner electrodes. The main body includes a projecting portion projecting in a direction perpendicular or substantially perpendicular to the first direction at a position between the pair of first outer electrodes. The second outer electrode is provided on one surface of the projecting portion viewable when viewed in the first direction.

Three-terminal capacitor with cylindrical main body and electronic component including the same

A piezoelectric-transformer inverter includes a piezoelectric transformer for supplying a transformed voltage to a load connected to a secondary electrode thereof. A first coil and a first transistor are connected to one primary electrode of the piezoelectric transformer, and a second coil and a second transistor are connected to the other primary electrode of the piezoelectric transformer. The first and second transistors are alternately turned on and off such that the phase of the voltage applied between the primary electrodes is reversed cyclically. The operation frequency is controlled such that an AC current flowing through the load is maintained at a predetermined level. The piezoelectric transformer has a piezoelectric substrate. In a first half region of the piezoelectric substrate, a plurality of electrode films are layered in order to form the primary electrodes. The secondary electrode is formed on an end surface of the piezoelectric substrate opposite to the primary electrodes. The piezoelectric substrate is polarized in a first direction in the first half region where the primary electrodes exist and is polarized in a second direction different from the first direction in a second half region where the secondary electrode exists. The piezoelectric transformer operates in a half wavelength mode.

Piezoelectric-transformer inverter

Growing community of inventors

Kusatsu, Japan

Ken Takakura