New Negative Conductances in GaAs n+-n-n+ Ballistic Diodes

Abstract
Two terminal conductances for GaAs n+-n-n+ ballistic diodes are calculated by using a simplified diode model. It is found from the results that, due to space charge transit time effects, negative conductances appear in such ballistic diodes at a far infrared frequency range. It is also demonstrated that diode conductance-frequency characteristics are affected significantly by the plasma oscillation frequency.