Title :
A 5.58nW 32.768kHz DLL-assisted XO for real-time clocks in wireless sensing applications
Author :
Yoon, Dongmin ; Sylvester, Dennis ; Blaauw, David
Author_Institution :
Univ. of Michigan, Ann Arbor, MI, USA
Abstract :
There is a growing interest in ultra-low-power wireless microsystems [1]. Synchronization between different nodes in a wireless sensor network plays an important role in the overall node energy budget due to the high power demand of wireless communication. One synchronization approach is to employ a realtime clock (RTC) on each node, with nodes awakening periodically to communicate and re-synchronize. With recent work on ultra-low-power microsystems demonstrating average power consumption of several nW [2], there is a need for ultra-low-power timers that can synchronize communication events and serve as frequency references for radios.
Keywords :
clocks; crystal oscillators; delay lock loops; low-power electronics; micromechanical devices; radiocommunication; synchronisation; wireless sensor networks; DLL-assisted XO; RTC; communication events synchronization; frequency 32.738 kHz; high power demand; overall node energy budget; power 5.58 nW; power consumption; radio frequency references; real-time clocks; realtime clock; ultra-low-power microsystems; ultra-low-power timers; ultra-low-power wireless microsystems; wireless communication; wireless sensing applications; wireless sensor network; Crystals; Iron; MOS devices; Oscillators; Power demand; Temperature; Wireless sensor networks;
Conference_Titel :
Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2012 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4673-0376-7
DOI :
10.1109/ISSCC.2012.6177043
