Comments on “Analog layout using ALAS!” [and reply]

Author

Pease, R.A. ; Bruce, J.D. ; Li, H.W. ; Baker, R. Jacob

Author_Institution

Nat. Semicond. Corp., Santa Clara, CA

Volume

31

Issue

9

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

1364

Lastpage

1365

Abstract

For the original article see ibid., vol. 31, no. 2, p. 271-4 (1996). In the aforementioned paper the authors consider the advantages of laying out matched pairs of transistors, resistors, capacitors, etc., with interdigitated geometries and common centroid. Then they show six examples of “matched devices”. However, the commenters point out that not one has a common centroid. This leads to the conclusion that the computer program ALAS! seems to have a remarkable consistency in making layouts where the centroids are never in common. In reply, the authors thanks R.A. Pease for his comments on their paper and respond to his concerns, especially clarifying the issues regarding common-centroid versus interdigitated layout

Keywords

analogue integrated circuits; circuit layout CAD; integrated circuit layout; ALAS! computer program; CAD; analog layout; common-centroid layout; interdigitated geometries; matched pairs; Capacitance; Capacitors; Computational geometry; Conductivity; Global warming; Integrated circuit interconnections; Resistors; Solid state circuits; Temperature;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.535427

Filename

535427