Replacing MOSFETs with Single Electron Transistors (SET) to Reduce Power Consumption of an Inverter Circuit

Year: 2015 Volume: 9 Issue: 3 405 - 410 Pages

• Authors:
• Ahmed Shariful Alam
• Abu Hena M. Mustafa Kamal
• M. Abdul Rahman
• M. Nasmus Sakib Khan Shabbir
• Atiqul Islam

Abstract: According to the rules of quantum mechanics there is a non-vanishing probability of for an electron to tunnel through a thin insulating barrier or a thin capacitor which is not possible according to the laws of classical physics. Tunneling of electron through a thin insulating barrier or tunnel junction is a random event and the magnitude of current flowing due to the tunneling of electron is very low. As the current flowing through a Single Electron Transistor (SET) is the result of electron tunneling through tunnel junctions of its source and drain the supply voltage requirement is also very low. As a result, the power consumption across a Single Electron Transistor is ultra-low in comparison to that of a MOSFET. In this paper simulations have been done with PSPICE for an inverter built with both SETs and MOSFETs. 35mV supply voltage was used for a SET built inverter circuit and the supply voltage used for a CMOS inverter was 3.5V.

• Keywords:
• ITRS
• enhancement type MOSFET
• island
• DC analysis
• transient analysis
• power consumption
• background charge co-tunneling.

A Robust Controller for Output Variance Reduction and Minimum Variance with Application on a Permanent Field DC-Motor

Year: 2009 Volume: 3 Issue: 3 491 - 496 Pages

• Authors:
• Mahmood M. Al-Imam
• M. Mustafa

Abstract: In this paper, we present an experimental testing for a new algorithm that determines an optimal controller-s coefficients for output variance reduction related to Linear Time Invariant (LTI) Systems. The algorithm features simplicity in calculation, generalization to minimal and non-minimal phase systems, and could be configured to achieve reference tracking as well as variance reduction after compromising with the output variance. An experiment of DCmotor velocity control demonstrates the application of this new algorithm in designing the controller. The results show that the controller achieves minimum variance and reference tracking for a preset velocity reference relying on an identified model of the motor.

• Keywords:
• Output variance
• minimum variance
• overparameterization
• DC-Motor.