DocumentCode :
837394
Title :
High-level synthesis of ΔΣ Modulator topologies optimized for complexity, sensitivity, and power consumption
Author :
Tang, Hua ; Doboli, Alex
Author_Institution :
Dept. of Electr. & Comput. Eng., State Univ. of New York, Stony Brook, NY, USA
Volume :
25
Issue :
3
fYear :
2006
fDate :
3/1/2006 12:00:00 AM
Firstpage :
597
Lastpage :
607
Abstract :
This paper proposes a novel topology-synthesis methodology for single-loop single-bit ΔΣ modulators. The goal is to explore all possible topologies and to obtain the optimal topology under various design considerations, such as hardware complexity, modulator sensitivity, and power consumption. A generic modulator architecture that incorporates all possible feedback and feedforward signal paths was defined and the symbolic noise transfer function (NTF) and signal transfer function (STF) for the generic topology were derived. The symbolic functions were then used to formulate the topology-exploration problem as a mixed-integer nonlinearly constrained programming (MINLP) problem that simultaneously generates and selects the optimal modulator topology with respect to the cost function. Experiments show the superiority of synthesized topologies as compared to traditional modulator topologies.
Keywords :
circuit complexity; circuit optimisation; delta-sigma modulation; high level synthesis; network topology; transfer functions; Δ-Σ modulator topology; feedforward signal path; hardware complexity; high-level synthesis; mixed-integer nonlinear constrained programming; modulator sensitivity; noise transfer function; signal transfer function; single-loop single-bit modulator; topology-synthesis methodology; Cost function; Delta modulation; Energy consumption; Feedback; Functional programming; Hardware; High level synthesis; Modulation coding; Topology; Transfer functions; Delta-sigma modulator; sensitivity; synthesis; topology;
fLanguage :
English
Journal_Title :
Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0278-0070
Type :
jour
DOI :
10.1109/TCAD.2005.854633
Filename :
1597392
Link To Document :
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