Comprehensive Literature Review on Voltage Reference Circuits: Analysis and Comparison of State-of-the-Art Designs

This paper presents a comprehensive literature review and comparative analysis of voltage reference circuits, examining 30 state-of-the-art designs published during the 2010s. Voltage references are critical building blocks in analog and mixed-signal integrated circuits, providing stable reference voltages independent of process, voltage, and temperature variations. The surveyed circuits are systematically categorized into eight distinct groups based on their primary design objectives: ultra-low power (ULP), ultra-low voltage (ULV), high power supply rejection ratio (PSRR), high precision, low-voltage low-power, low temperature coefficient, harsh environment operation, and small die area implementations. For each category, detailed performance comparisons are provided, including key metrics such as temperature coefficient, line regulation, power consumption, chip area, and PSRR. The paper also provides a thorough background on voltage reference fundamentals, performance metrics, and advanced design techniques, including temperature compensation methods, sub-1V operation, higher-order curvature correction, and resistorless CMOS implementations. This comprehensive survey serves as a valuable reference for researchers and designers working on voltage reference circuits, offering insights into design trade-offs and identifying research trends in the field. The analysis reveals that while significant advances have been made in ultra-low power and sub-1V operation, challenges remain in simultaneously achieving multiple performance objectives, highlighting opportunities for future research.