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A Sub-1V, Current-mode Bandgap Voltage Reference in Standard 65 nm CMOS Process
Journal
Proceedings of the 2022 IEEE Dallas Circuits and Systems Conference, DCAS 2022
Date Issued
2022-01-01
Author(s)
Jain, Shubham
Kanchetla, Vijaya Kumar
Zele, Rajesh
Abstract
This paper presents a sub-lV current-mode bandgap reference (BGR) for low-supply voltage system-on-chips (SOCs). The proposed BGR uses an amplifier with input butter to relax the biasing requirements of the transistors, avoiding the native transistors and low-threshold devices. Fabricated in standard 65 nm CMOS technology, the circuit occupies an area of 0.02 mm2. The BGR provides an output reference voltage of 571 mV while operating with a low supply voltage of 1.04 V. Integrated into a receiver operating at 1.2 V power supply, the BGR consumes a current of 182.3 muA. The BGR exhibits a temperature coefficient of 12.34 ppm/0C, power supply rejection ratio (PSRR) of 34.94 dB at 10 Hz, and an output noise voltage of 42.63 muV/sqrt{Hz} at frequency close to DC in simulations.
Subjects