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Electrical Engineering and Systems Science > Systems and Control

arXiv:2101.07517 (eess)
[Submitted on 19 Jan 2021 (v1), last revised 24 Sep 2021 (this version, v2)]

Title:FUBOCO: Structure Synthesis of Basic Op-Amps by FUnctional BlOck COmposition

Authors:Inga Abel, Helmut Graeb
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Abstract:This paper presents a method to automatically synthesize the structure of an operational amplifier. It is positioned between approaches with fixed design plans and a small search space of structures and approaches with generic structural production rules and a large search space with technically impractical structures. The presented approach develops a hierarchical composition graph based on functional blocks that spans a search space of thousands of technically meaningful structure variants for single-output, fully-differential and complementary operational amplifiers. The search algorithm is a combined heuristic and enumerative process. The evaluation is based on circuit sizing with a library of behavioral equations of functional blocks. Formalizing the knowledge of functional blocks in op-amps for structural synthesis and sizing inherently reduces the search space and lessens the number of created topologies not fulfilling the specifications. Experimental results for the three op-amp classes are presented. An outlook how this method can be extended to multi-stage op-amps is given.
Comments: This work has been submitted to ACM for possible publication
Subjects: Systems and Control (eess.SY)
Cite as: arXiv:2101.07517 [eess.SY]
  (or arXiv:2101.07517v2 [eess.SY] for this version)
  https://doi.org/10.48550/arXiv.2101.07517

Submission history

From: Inga Abel [view email]
[v1] Tue, 19 Jan 2021 09:01:12 UTC (11,982 KB)
[v2] Fri, 24 Sep 2021 11:15:22 UTC (9,061 KB)
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