Behavioral simulation for analog system design verification

摘要

Synthesis of analog circuits is an emergent field, with efforts focused at the cell level. With the growing trend of mixed ASIC designs that contain significant portions of analog sections, compatible design methodologies in the analog domain are necessary to complement those in the digital domain. The synthesis process requires an associated verification process to ensure that the designs meet performance specifications at the onset. In this paper we present a behavioral simulation methodology for analog system design verification and design space exploration. The verification task integrates with analog system-level synthesis for an integrated synthesis-verification process that avoids expensive post synthesis simulation by invoking external simulators. Thus rapid redesign at the architectural level can be undertaken for design parameter variation and during optimization. The verification suite is composed of a repertoire of analysis modes that include time and frequency domain analysis, sensitivity analysis and distortion analysis. Besides verification of design specifications, these analysis modes are also used to generate metrics for comparison of various architectural choices that could realize a given set of specifications. The implementation is in the form of a behavioral simulator, ARCHSIM.