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A both Gaussian and sinusoidal phase-to-amplitude converter for low-power ultra-high-speed direct digital synthesizers

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3 Author(s)
Borr, T. ; LAAS, CNRS, Toulouse, France ; Juyon, J. ; Tournier, E.

This paper introduces a new bipolar differential pair topology for both Gaussian and sinusoidal signal shaping, to be used as a phase-to-amplitude converter alternative in low-power ultra-high-speed DDS. A DDS using this converter, with a 9-bit frequency resolution and an 8-bit amplitude resolution has been designed in a 0.13 μm SiGe BiCMOS technology, with ft/fmax of 200/250 GHz, and simulated up to a 20 GHz operating clock frequency. It consumes 585 mW under a 2.8 V power supply. Simulated triangle shape allows an optimal SFDR of -44.5 dBc in sinus mode and a SLRR of -43.5 dBc in Gaussian mode.

Published in:

New Circuits and Systems Conference (NEWCAS), 2011 IEEE 9th International

Date of Conference:

26-29 June 2011