TY  - SER
AU  - lim, Kee-Joe
AU  - Park, Seong-Hee
AU  - Kang, Seong-Hwa
TI  - Step-Down Piezoelectric Trans Former Using Pzt-Pmns Ceramies
KW  - Piezoelectric (Pzt)
KW  - Pzt-Pmns
KW  - Adaptor
ER  -