Class AB Ultra Low Input Impedance Trans-linear Based Second Generation Current Conveyor

Author

Faculty of Engineering, Department of Electrical and Electronic Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran

Abstract

In this paper a novel class AB, ultra-low input impedance trans-linear based second generation current conveyor utilizing current positive feedback technique is proposed and the principle of its operation is discussed. In order to verify the performance of the proposed structure and also the achieved results the effect of temperature, threshold voltage, W/L and VDD variations is investigated on the circuit applying Monte Carlo analysis with thirty runs including 3 percent error which proves the robustness of the proposed technique. The input impedance of port X remains at relatively low values of about 0.83mΩ to frequencies up to 10MHz. The circuit has ultra-low offset current of 12.3nA and offset voltage of 17.2mV. It has current gain of 1.000 and current signal bandwidth of 900MHz. The voltage gain of 0.964 with voltage signal bandwidth of 600MHz is also achieved. The proposed CCII is simulated with HSPICE in TSMC 0.18µm CMOS technology. ±1.5V supply voltage with 10µA bias current is considered and the power dissipation of 304.28µW is measured.

Keywords