An ultra high power supply ripple rejection nanowatt voltage reference using two-stage self-regulating technique

This paper presents a nanowatt two-stage self-regulated voltage reference (TSSR VR) with a key advantage of minimal dependence on power supply variations. The proposed TSSR VR achieves excellent power supply ripple rejection (PSRR) and line sensitivity (LS) performance, making it highly suitable for applications where the power supply voltage experiences significant variations. The simulation is performed using standard 180 nm CMOS technology and the results show an output voltage of 151.73 mV with a temperature coefficient (TC) of 9.91 ppm/°C over a temperature range of 0 to 120°C. The excellent line sensitivity of 0.830 × 10−3 %/V is achieved with a supply voltage from 0.6 V to 2 V. The proposed TSSR VR achieves a PSRR of −99.55 dB while consumes 3.71 nW at room temperature for a VDD of 0.6 V.