Synthesis of high-performance analog circuits in ASTRX/OBLX

Emil S. Ochotta, Rob A. Rutenbar, L. Richard Carley

Research output: Contribution to journalArticlepeer-review

Abstract

We present a new synthesis strategy that can automate fully the path from an analog circuit topology and performance specifications to a sized circuit schematic. This strategy relies on asymptotic waveform evaluation to predict circuit performance and simulated annealing to solve a novel unconstrained optimization formulation of the circuit synthesis problem. We have implemented this strategy in a pair of tools called ASTRX and OBLX. To show the generality of our new approach, we have used this system to resynthesize essentially all the analog synthesis benchmarks published in the past decade; ASTRX/OBLX has resynthesized circuits in an afternoon that, for some prior approaches, had required months. To show the viability of the approach on difficult circuits, we have resynthesized a recently published (and patented), high-performance operational amplifier; ASTRX/OBLX achieved performance comparable to the expert manual design. And finally, to test the limits of the approach on industrial-sized problems, we have synthesized the component cells of a pipelined A/D converter; ASTRX/OBLX successfully generated cells 2-3 x more complex than those published previously.

Original languageEnglish (US)
Pages (from-to)273-294
Number of pages22
JournalIEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems
Volume15
Issue number3
DOIs
StatePublished - 1996

ASJC Scopus subject areas

  • Software
  • Computer Graphics and Computer-Aided Design
  • Electrical and Electronic Engineering

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