Floating Positive/Negative Resistance Simulators Employing Single Dual-output OTA

This article reviews floating positive and negative resistance simulators, based on dual-output operational transconductance amplifier (DO-OTA). The features of proposed circuit are that: the resistance value can be controlled electronically by adjusting the input bias current of OTA, the schemes are very simple; they comprise only single DO-OTA without any passive element requirements, trey are suitable for further fabricating in IC form. In addition, it can be used for sensing temperature. Simulation results obtained from PSPICE are in accordance with the theoretical predictions. The maximum bandwidth is 82.7 MHz and their resistances can be tuned by bias current over 300 nA - 3 mA. Resistance increasing and some applications are included