A novel design approach of charge plasma tunnel FET for radio frequency applications

In this paper, the impact of extra electron source(EES) and dual metal gate engineering on conventional charge plasma TFET(CP-TFET) have been done for improving DC and analog/RF parameters. CP-TFET structure is upgraded to double source CP-TFET(DS-CP-TFET) by placing an EES below the source/channel junction for enhancing the device performance in terms of driving current and RF figures of merit(FOMs). But, in spite of these pros, the approach is having cons of higher leakage current similar to MOSFET and negative conductance(inherent nature of TFET). Both the issues have been resolved in the double source dual gate CP-TFET(DS-DG-CP-TFET) by gate workfunction engineering and drain underlapping respectively. Additionally,for getting the optimum performance of DS-DG-CP-TFET, the device sensitivity has been investigated in terms of position of EES,length of drain electrode and workfunction of gate electrode 1(GE1).

QFT preflter design for multivariable systems using interval constraint satisfaction technique

In this paper, a computationally efficient method is proposed for automated design of the prefilters for multivariable systems. In quantitative feedback theory （QFT） method, proposed by Horowitz, the prefilter is designed to achieve the desired tracking specifications. In the proposed approach, we pose the prefilter design problem as an interval constraint satisfaction problem and solve it using the well-established interval constraint satisfaction techniques. The proposed method finds optimal values of the parameters of fixed structure prefilter within the initial search domain. An approach based on prefilter synthesis for single-input single-output is already developed. The purpose of this paper is to extend this approach to QFT prefilter design for general multivariable systems. To validate the above design approach, we applied the method to a laboratory setup of magnetic levitation system.