Title :
A 100 μW, 1.9GHz oscillator with fully digital frequency tuning
Author :
Pletcher, Nathan M. ; Rabaey, Jan M.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
Abstract :
A 1.9GHz CMOS digitally controlled oscillator (DCO) is designed in a standard 0.13μm process, targeting ultra low power frequency synthesizers for wireless sensor network transceivers. The oscillator exploits subthreshold device operation and a low 0.5V supply to achieve power consumption of only 100μW. A novel switched capacitor configuration is employed to realize a frequency resolution of 200 kHz with a tuning range of 150MHz. High quality bondwire inductors also reduce power consumption. The phase noise is -114dBc/Hz at 1MHz offset, achieving performance competitive with other published work.
Keywords :
CMOS digital integrated circuits; UHF oscillators; circuit tuning; integrated circuit design; phase noise; transceivers; wireless sensor networks; 0.13 micron; 0.5 V; 1 MHz; 1.9 GHz; 100 muW; 150 MHz; 200 kHz; CMOS digitally controlled oscillator; digital frequency tuning; high quality bondwire inductors; phase noise; switched capacitor configuration; ultra low power frequency synthesizers; wireless sensor network transceivers; CMOS process; Capacitors; Digital control; Energy consumption; Frequency synthesizers; Oscillators; Power supplies; Transceivers; Tuning; Wireless sensor networks;
Conference_Titel :
Solid-State Circuits Conference, 2005. ESSCIRC 2005. Proceedings of the 31st European
Print_ISBN :
0-7803-9205-1
DOI :
10.1109/ESSCIR.2005.1541641
