@conference {Zhang2013b,
	title = {A 20uW 10MHz Relaxation Oscillator with Adaptive Bias and Fast Self-Calibration in 40nm CMOS for Micro-Aerial Robotics Application},
	booktitle = {IEEE Asian Solid-State Circuits Conference (ASSCC)},
	year = {2013},
	abstract = {Efficient actuation control of flapping-wing microrobots requires a low-power frequency reference with good absolute accuracy. To meet this requirement, we designed a fully-integrated 10MHz relaxation oscillator in a 40nm CMOS process. By adaptively biasing the continuous-time comparator, we are able to achieve a power consumption of 20μW, a 68\% reduction to the conventional fixed bias design. A built-in self-calibration controller enables fast post-fabrication calibration of the clock frequency. Measurements show a frequency drift of 1.2\% as the battery voltage changes from 3V to 4.1V.},
	keywords = {robobees},
	url = {10.1109/ASSCC.2013.6691075},
	author = {Xuan Zhang and David Brooks and Gu  Wei}
}
