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

Teddy Borr (1) , Julien Juyon (1) , Éric Tournier (1)

1 LAAS-MOST - Équipe Microondes et Opto-microondes pour Systèmes de Télécommunications

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.

Domaines: Electronique

Teddy Borr, Julien Juyon, Éric Tournier. A both Gaussian and sinusoidal phase-to-amplitude converter for low-power ultra-high-speed direct digital synthesizers. NEWCAS, Jun 2011, Bordeaux, France. pp.5-8, ⟨10.1109/NEWCAS.2011.5981205⟩. ⟨hal-00713855v2⟩