A 0.5-V 28-nm CMOS Inverter-Based Comparator with Threshold Voltage Control

This paper proposes a novel solution for CMOS inverter-based comparators with threshold voltage control. The solution was simulated in a 28-nm bulk technology under 0.5-V supply. Extensive simulation results show that a reasonable accuracy in the threshold voltage setting is achieved regardless PVT variations. Outperformed average current consumption of about 125 nA, excluding reference circuitry, and rise/fall time of 7.9 $\mu$s suggest wide field of applications for the proposed circuit, ranging from A/D converters to sensors for biomedical applications.