Paul Jespers – författare

Analog to digital and digital to analog converters are essential interfaces between computers and the outside world. They interface most signal processing devices and are embedded in an ever larger number of integrated circuits used for example in the telecommunications industry, remote control devices, and medical electronic instruments.This book surveys recent progress and gives an account of the working principles of integrated converters. It describes the architectures and discusses accuracy and speed in depth.The suporting web site provides MATLAB programs (in UNIX, PC, and Mac versions) which allow the reader to experiment with some of the concepts explained in the book. The appendix describes how to use the programs in order to simulate converters at the system level; thirteen examples are given to show what is feasible and how to run programs.

In "The gm/ID Methodology, a Sizing Tool for Low-Voltage Analog CMOS Circuits", we compare the semi-empirical to the compact model approach. Small numbers of parameters make the compact model attractive for the model paves the way towards analytic expressions unaffordable otherwise. The E.K.V model is a good candidate, but when it comes to short channel devices, compact models are either inaccurate or loose straightforwardness. Because sizing requires basically a reliable large signal representation of MOS transistors, we investigate the potential of the E.K.V model when its parameters are supposed to be bias dependent. The model-driven and semi-empirical methods are compared considering the Intrinsic Gain Stage and a few more complex circuits. A series of MATLAB files found on extras-springer.com  allow redoing the tests.