Analog Signal Processing Using Current Mode Computational Circuits

Abstract

In this study, enhanced linearity and wide linear range current adder and subtractor circuits based on cascode current mirrors are presented. Among other analogue signal processing devices, the described circuits can be employed in operational transconductance amplifiers (OTA), Gm-C filters, and amplifiers. To enhance current mirroring performance, the suggested circuits use the cascode current mirror topology. A 1.8-volt supply and TSMC 0.18-micron CMOS technology were used to model the suggested circuits. The suggested circuits have an allowed error percentage of less than 2.5% and perform well in the current range of 0 to 80 A. The outcomes of the SPICE simulation have shown how well the proposed circuits work.