ON THE DESIGN OF NEW CMOS DO-OTA TOPOLOGIES PROVIDING HIGH OUTPUT IMPEDANCE AND EXTENDED LINEARITY RANGE

In this paper, new realization techniques to enhance the performance of the CMOS differential output transconductance amplifiers (DO-OTAs) are proposed by combining the high-performance input and output stages given in the literature. The circuits proposed exhibit higher linearity and input signal range compared to the conventional counterparts. The advantage provided by the circuits proposed is demonstrated by SPICE simulations on current mode filters. The results prove that the new circuits exhibit a better performance for the input linearity and for the output impedance.