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Low power direct digital frequency synthesizers in 0.18 μm CMOS

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2 Author(s)
Langlois, J.M.P. ; Dept. of Electr. & Comput. Eng., R. Mil. Coll. of Canada, Kingston, Ont., Canada ; Al-Khalili, D.

Two low-power sine-output direct digital frequency synthesizers have been fabricated in 0.18 μm CMOS, tested and characterized. The first IC has a 16-bit phase accumulator and it generates a single phase sinusoidal digital sequence with 60 dBc of spurious free dynamic range. Core power consumption is as low as 15 μW/MHz. The second IC has a 32-bit phase accumulator and it generates quadrature sinusoidal digital sequences with 84 dBc of spurious free dynamic range. Its core consumes as little as 220 μW/MHz. Both ICs employ an efficient linear interpolation scheme for sinusoidal functions, developed by the authors.

Published in:

Custom Integrated Circuits Conference, 2003. Proceedings of the IEEE 2003

Date of Conference:

21-24 Sept. 2003

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