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This paper proposes a new circuit topology for a multilevel PWM rectifier. The proposed circuit combines a diode clamp type topology with a flying capacitor type topology. As a result, the proposed circuit uses only 12 switches, despite the use of a five-level three-phase PWM rectifier. Further, the proposed circuit can obtain good performance as same as to a conventional multilevel circuit. This...
We propose a novel approach to control the effective workfunction (WF) by taking advantage of crystal structures in metal gate electrodes. The crystal structures determine the predominant material elements at the metal/high-k interface. We have found that, in a Ru-Mo alloy system, a randomly-oriented Ru (fcc) structure promotes the segregation of Mo at the interface, enabling us to achieve a wide...
Rail-to-rail operational amplifiers with an adaptive threshold voltage control circuit are designed at low supply voltage of 0.9-V. The control circuit using a bulk bias effect acts to keep enough drain-source voltage for the current source transistor connected with sources of the input transistors. Two types of operational amplifier based on the adaptive threshold voltage control technique are developed...
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