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This paper presents a digital control and design and implementation of a multiphase DC-DC converter with a given set of performance specifications. First, the open loop transfer functions of a two-phase converter are derived. Digital voltage mode control is applied for voltage regulation, and digital active current sharing method is designed to obtain the average phase current. Then, digital controller...
Explaining the mismatch between predicted timing behavior from modeling and simulation, and the observed timing behavior measured on silicon chips can be very challenging. Given a list of potential sources, the mismatch can be the aggregate result caused by some of them both individually and collectively, resulting in a very large search space. Furthermore, observed data are always corrupted by some...
As technology scales, it is becoming increasingly difficult for simulation and timing models to accurately predict silicon timing behavior. When a collection of chips fail in timing in a similar way, diagnosis and silicon debug look to find the root-causes for the failure. However, little work has been done to develop a methodology that looks for useful design information in the good-chip data. This...
Statistical static timing analysis (SSTA) has been a popular research topic in recent years. A fundamental issue with applying SSTA in practice today is the lack of reliable and efficient statistical timing models (STM). Among many types of parameters required to be carefully modeled in an STM, spatial delay correlations are recognized as having significant impact on SSTA results. In this work, we...
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