Noise Modulation of a Bandgap Reference by Using a Single Resistor

This paper presents a low-noise CMOS bandgap reference employing a single-resistor noise modulation technique to improve reference voltage stability and reduce output noise. The proposed architecture utilizes a carefully optimized resistor in the bandgap reference network to modulate and suppress thermal and flicker noise without significantly increasing circuit complexity or power consumption. By minimizing noise contributions from the bias circuitry and improving current distribution, the circuit achieves a stable reference voltage with enhanced line regulation, load regulation, and temperature stability. The design is implemented and simulated using CMOS technology in Cadence Virtuoso, where key performance parameters including reference voltage accuracy, output noise, power consumption, supply current, temperature coefficient, line regulation, and load regulation are evaluated. The proposed design demonstrates lower output noise, improved voltage stability, and enhanced energy efficiency compared with conventional CMOS bandgap reference circuits, making it suitable for precision analog, mixed-signal, and power management applications.