H - Electricity – 03 – M
Patent
H - Electricity
03
M
H03M 1/00 (2006.01)
Patent
CA 2525707
A high speed D/A converter includes a phase aligner, and a vector summation block. The phase aligner operates to ensure precise phase alignment between corresponding bits of a parallel N-bit digital signal having a data rate of at least 2GHz. The vector addition block performs a vector addition of the phase aligned bits of the parallel N-bit digital signal. Each bit of the parallel N- bit digital signal can be weighted to ensure a correct additive contribution to the analog signal level appearing at the output of the D/A converter. Vector addition of the weighted bits can be accomplished using a microwave signal combiner network in the form of either a multistage parallel cascade of impedance matched junctions, or a linear cascade of junctions.
L'invention concerne un convertisseur N/A à grande vitesse comprenant un aligneur de phase et un bloc d'addition vectorielle. L'aligneur de phase sert à garantir un alignement de phase précis entre des bits correspondants d'un signal numérique parallèle à N bits présentant un débit binaire d'au moins 2 GHz. Le bloc d'addition vectorielle effectue une addition vectorielle des bits à alignement de phase du signal numérique parallèle à N bits. Chaque bit dudit signal peut être pondéré pour garantir une contribution additive correcte au niveau de signal analogique apparaissant à la sortie du convertisseur N/A. L'addition vectorielle des bits pondérés peut être accomplie au moyen d'un réseau combinateur de signaux micro-ondes sous la forme d'une cascade parallèle multi-étages de jonctions à adaptation d'impédance ou d'une cascade linéaire de jonctions.
Roberts Kim B.
Strawczynski Leo L.
Taraschuk Terrance
Blake Cassels & Graydon Llp
Ciena Luxembourg S.a.r.l.
Nortel Networks Limited
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