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A 100 μW, 1.9GHz oscillator with fully digital frequency tuning

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2 Author(s)
Pletcher, N.M. ; Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA ; Rabaey, J.M.

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.

Published in:

Solid-State Circuits Conference, 2005. ESSCIRC 2005. Proceedings of the 31st European

Date of Conference:

12-16 Sept. 2005

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