Research theme for competitive and other funds (6):
2022 - 2025 次世代ゲート駆動回路の高性能・高機能化を実現する弾性境界波フィルタの開発
2018 - 2021 Improvement of gate-drive circuit using surface acoustic wave devices, and application to a next-generation multi-level inverter
2014 - 2017 次世代電力変換回路に適したSAWフィルタを用いたゲート駆動回路の提案
2010 - 2012 超小型原子発振器の実現化に関する研究
2009 - 2010 超小型原子発振器の低消費電力化に関する研究
Study on Piezoelectric Devices
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Papers (92):
Tatsuhiro Kojima, Keiji Wada, Shigeyoshi Goka. Wireless Time Synchronization based on GNSS Signals for Power Converter Circuit. IEEJ Transactions on Industry Applications. 2022. 142. 8. 647-648
Hiroshi Tokuyama, Keiji Wada, Shigeyoshi Goka. Gate Drive Circuit Using SAW Filter Capable of Power and Signal Transmissions. IEEJ Transactions on Industry Applications. 2021. 141. 4. 324-329
Ken Watada, Shigeyoshi Goka, Shoji Kakio, Fumiya Kobayashi, Ryo Nonaka, Keiji Wada. Power transmission characteristics of EWC-SPUDT SAW filters fabricated for multiplex transmission system of inverter gate drive circuits. Japanese Journal of Applied Physics. 2020. 59. SK. SKKC05-SKKC05
Keiji Wada, Shigeyoshi Goka, Shoji Kakio. A gate drive circuit using SAW filters based on frequency division multiplex transmission system. 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia, IFEEC - ECCE Asia 2017. 2017. 1168-1171
Design and Experimental Verification of a Gate Drive Circuit using SAW filters of Inverter Circuit. 2015. 2015. 169. 25-30
Kishita Hiroyuki, Goka Shigeyoshi, Yano Yuichiro. A Study on Magnetic Slope Measurement using Atomic Resonance. Proceedings of the Society Conference of IEICE. 2013. 2013. "S-24"-"S-25"
Harasaka Kazuhiro, Motomura Hiroshi, Suzuki Ryohichiro, Hara Kei, Suzuki Mitsuru, ltoh Akihiro, Shoji Hiroyoshi, Satoh Shunichi, Yano Yuichiro, Goka Shigeyoshi. 894.6nm VCSEL for chip scale atomic clocks(CSAC). Proceedings of the Society Conference of IEICE. 2013. 2013. "S-30"-"S-31"
Maeda Ryo, Goka Shigeyoshi, Yano Yuichiro. Experimental Study of Multi-Axis CPT Magnetometer. Proceedings of the Society Conference of IEICE. 2013. 2013. "S-26"-"S-27"
WATANABE Yasuaki, GOKA Shigeyoshi, KAJITA Masatoshi. Technical Report : Investigation Committee on Next Generation Circuit Technologies for Precise-Frequency Generation and Distribution. 2013. 2013. 74. 23-28