ALAS!: an analog layout assistant for matched and balanced CMOS components

Abstract

Analog integrated circuits are more sensitive to process variations than their digital counterparts. This fact, along with the lack of analog standard cells, results in tedious layout of analog circuits. Layout techniques such as interdigitation can make key analog components less sensitive to process variation, but requires complicated and time consuming full-custom layout. This paper presents an analog layout assistant (ALAS!), that automatically generates matched and balanced CMOS component pairs with minimal input parameters from the user.