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Surface carriers’ concentration dynamics caused by a small alternating applied voltage

R. ŠAŠIĆ1, P. M. LUKIĆ2,* , S. M. OSTOJIĆ1, R. M. RAMOVIĆ3

Affiliation

  1. Faculty of Technology and Metallurgy, Karnegijeva 4, Belgrade, Serbia
  2. Faculty of Mechanical Engineering, Kraljice Marije 16, Belgrade, Serbia
  3. Faculty of Electrical Engineering, Bulevar kralja Aleksandra 73, Belgrade, Serbia

Abstract

One of our previous papers was devoted to threshold voltage in MOSFETs and MODFETs viewed as a problem of nonlinear dynamics. The behavior of surface carriers’ concentration under D.C. (direct current) applied voltage has been investigated in details. In this paper we went a step further and investigated the behavior of the same quantity under combined D.C. and A.C. (alternating current). As a main result emerged that it was impossible to cause small harmonic oscillations of surface carriers’ concentration around some equilibrium value regardless of applied D.C. voltage and thus imposed operating regime..

Keywords

Surface carriers, MOSFET, MODFET, D.C. voltage.

Submitted at: Nov. 10, 2008
Accepted at: Dec. 10, 2008

Citation

R. ŠAŠIĆ, P. M. LUKIĆ, S. M. OSTOJIĆ, R. M. RAMOVIĆ, Surface carriers’ concentration dynamics caused by a small alternating applied voltage, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 12, pp. 3430-3435 (2008)