Design of current-mode CMOS Schmitt circuit and research on its electromagnetic interference immunity.

Enhancing the electromagnetic interference (EMI) resistance of electronic systems has emerged as a critical focus of research with the growing complexity of the electromagnetic environment. In the context of deep submicron processes, the current-mode CMOS circuits exhibit several advantages, including high speed, low power consumption, and superior noise immunity. Thus, we propose an improved conventional current-mode CMOS inverter and a current-mode CMOS Schmitt inverter based on the principles of threshold arithmetic algebra system. Simulation and printed circuit board (PCB) testing results indicate that the designed Schmitt inverter improves immunity of the conventional inverter to pulsed and sine wave interference. Additionally, the simulation results reveal that Schmitt inverter exhibits a greater resilience to sine wave interference than pulsed wave interference, and the higher the frequency of the interfering signals, the greater the current-mode CMOS Schmitt inverter's immunity. [ABSTRACT FROM AUTHOR]