A 0.5V, 5.7ppm/°C Voltage Reference with Subthreshold MOSFET and Piecewise Compensation

This paper introduces a new voltage reference design using subthreshold MOSFETs and a piecewise temperature compensation technique. The design addresses the challenges of high area and power consumption in traditional bandgap references (BGRs). By leveraging the negative temperature coefficient of subthreshold MOSFETs, the proposed architecture achieves a stable voltage reference with a low temperature coefficient of 5.7 ppm over the temperature range of −40°C to 125°C and power supply ripple rejection of −77dB. The design operates accurately within a supply range of 0.8V to 1.8V and achieves line regulation of 0.29%.