Low voltage CMOS transconductors using the series composite transistor

In this paper, low voltage CMOS transconductors using the series composite transistors are presented. The minimum input voltage of the designed circuits is V/sub Tn/, which is suitable for low supply voltage. The designed circuits have been simulated by HSPICE using 0.25 /spl mu/m n-well CMOS process. Simulation results show that THD is less than 1.2% for the differential input signal of up to 1.5V/sub p-p/ when the input signal frequency is 10 MHz.