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We investigated Vth fluctuations due to random telegraph signal (RTS) on gate work function control in Hf-doped silicate gate stack compared with the conventional impurity doping. Complex RTS were recognized for both n- and p-MOSFET. The WFC does not appreciably affect Vth fluctuations for n-and p-MOSFET. However, dopant contributes to Vth fluctuation, especially for the p-MOSFET. We found it is caused...
The passive optical network (PON) shares feeder transmission facilities to provide broadband services economically. To enhance PON survivability, ITU-T Rec. G.983.5 defines some protection switching methods. These methods, however, always bring about signal loss when switching is performed. Another related problem occurs when the network operator replaces one optical fiber cable with another that...
An inverter controlled induction motor driving system for electric car is developed and made a trial run. The gate control circuit of PWM inverter in this system is composed of PLLs or other analog circuits to make it simple. This paper describes the operation of this gate control circuit and results of tests. Good adhesion characteristics are obtained in running tests.
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