A -80dB PSRR 1.166ppm/°C bandgap voltage reference with improved high-order temperature compensation

Abstract

A novel high precision and high PSRR bandgap voltage reference with improved high-order temperature compensation is proposed in this paper. An accurate curvature compensation topology is designed to compensate the reference voltage in the high and low temperature sections respectively. A pre-regular circuit is deployed to improve the PSRR and enlarge input voltage range. Implemented with TSMC 0.18um process, this design achieves an ultra-low temperature coefficient (TC) of 1.166ppm/°C from −40 °C to 125 °C with a high PSRR of -80dB at 1KHz.

A -89dB PSRR 1.064ppm/°C bandgap voltage reference based on curvature compensation

“…Bandgap reference circuits are widely used in various largescale integrated circuits [1,2,3,4]. Their primary purpose is to deliver a stable output reference voltage signal, necessitating a low temperature coefficient and a high Power Supply Rejection Ratio (PSRR).…”

A 353pW, 0.014%/V line sensitivity self-biased CMOS voltage reference with source degeneration active load

“…Besides, the VR also needs to produce a stable voltage against process, supply voltage, and temperature (PVT) variations. Compared to the bandgap voltage reference (BGR) using BJTs and large resistors [1,2,3,4,5,6,7,8], the sub-threshold CMOS VRs (CVRs) are attractive alternatives for both low-voltage and low-power operation with less chip areas [9,10,11,12,13,14,15,16,17,18].…”