1. A New Neutral-Point-Clamped PWM Inverter
2. (2) I. Takahashi and K. Iwaya:“High Efficiency Low Harmonic Distortion Switching Type Power Amplifier Using Multilevel Inverter”, PCC Osaka 2002, Vol.2, pp.353-358 (2002)
3. (4) K. Iwaya and I. Takahashi:“Switching Type Power Amplifier Using Multilevel Inverter (Improvement of Frequency Characteristic)”, 2002 National Convention Record IEE Japan, 4-058, pp.88-89 (2002) (in Japanese)
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