Schematic Driven Layout Using the MOSIS Design Kit for Advanced Analog and Mixed-Signal Design

There is renewed interest in the field of analog and mixed-signal circuits, especially among designers of high-speed and wireless communication systems. Due to the typical custom design approach, a large amount of time is spent laying out large (matched) devices which greatly increases the probability of human error. Schematic-driven layout (SDL) has proven to be a powerful tool for assisting custom digital design in Universities and there is a need for similar SDL capabilities for analog and mixed-signal design. We are developing analog SDL extensions to the MOSIS Design Kit (MDK) with device generators for inter-digitated transistors, resistors, capacitors and inductors, and for matched pairs of inter-digitated transistors, resistors and capacitors in common centroid configurations. 1. Introduction A "system-on-a-chip" tries to incorporate digital logic, processors and memory together with analog and mixed-signal blocks on the same IC. This concept is made necessary by the fast adv..