1. (2) S. Sugahara and S. Matsunaga : “Fundamental Study of Influence of Ripple Noise from DC-DC Converter on Spurious Noise of Wireless Portable Equipment”, IEEE Trans. Power Electron., Vol. 31, No. 3, pp. 2111-2119 (2016)
2. (3) S. Sugahara, K. Yamada, M. Edo, T. Sato, and K. Yamasawa : “90% high efficiency and 100-W/cm3 high power density integrated dc-dc converter for cellular phones”, IEEE Trans. Power Electron., Vol. 28, No. 4, pp. 1994-2004 (2013)
3. (4) Y. Ahn, H. Nam, and J. Roh : “A 50-MHz fully integrated low-swing buck converter using packaging inductors”, IEEE Trans. Power Electron., Vol. 27, No. 10, pp. 4347-4356 (2012)
4. (5) V. Pala, H. Peng, P. Wright, M. M. Hella, and T. P. Chow : “Integrated high-frequency power converters based on GaAs phemt: Technology characterization and design examples”, IEEE Trans. Power Electron., Vol. 27, No. 5, pp. 2644-2656 (2012)
5. (6) H. Shimizu, M. Yoshiike, M. Naoe, T. Sato, Y. Yamasawa, and Y. Miura : “Fabrication of a Planar Inductor Using a Thick-Film Magnetic Metal Particle/Non-magnetic Material Composite for Micro Power Supply”, J. Magn. Soc. Jpn., Vol. 32, No. 6, pp. 559-563 (2008) (in Japanese)