A Novel Low-Power Subthreshold Voltage Reference Circuit with Enhanced PSRR

This paper introduces a novel subthreshold voltage reference circuit designed for low-power applications that require high stability and reliability. Unlike traditional designs, this circuit operates in weak inversion, significantly reducing power consumption while ensuring robust performance through a unique proportional to absolute temperature (PTAT) current generation mechanism complemented by a negative feedback loop. Thorough theoretical analysis and simulation validate the design’s ability to maintain ultra-low power consumption without compromising output stability under varying environmental conditions. Results demonstrate excellent line sensitivity, temperature stability, and power supply rejection ratio (PSRR), highlighting the circuit’s suitability for energy-efficient integrated circuits in internet-ofthings (IoT) and portable electronics.