A 1.2-MHz Relaxation Oscillator with 16.8-ppm/°C Temperature Coefficient using Resistive Self-Bias Current
Journal
ELECTRONICS LETTERS
Date
2019.02.06
Abstract
In this research, we propose a self-biased relaxation oscillator that outputs a constant 1.2-MHz clock over a wide temperature range. Excluding any external bias, the proposed oscillator embodies a self-bias circuit that generates a bias current from a precisely trimmed resistor. To minimize the power consumption, a switched-bias technique was applied to the two comparators in the oscillator. The proposed circuit was fabricated in a 180-nm CMOS process. It consumes 17.9 ？W from a 1.5-V supply, and its temperature coefficient is 16.8 ppm/°C in the range of -20？80°C.
Reference
Tokunaga, Y., Sakiyama, S., Matsumoto, A., et al: ‘An on-chip CMOS relaxation oscillator with voltag