Willy M Sansen – författare

Matching Properties of Deep Sub-Micron MOS Transistors examines this interesting phenomenon. Microscopic fluctuations cause stochastic parameter fluctuations that affect the accuracy of the MOSFET. For analog circuits this determines the trade-off between speed, power, accuracy and yield. Furthermore, due to the down-scaling of device dimensions, transistor mismatch has an increasing impact on digital circuits. The matching properties of MOSFETs are studied at several levels of abstraction:

A simple and physics-based model is presented that accurately describes the mismatch in the drain current. The model is illustrated by dimensioning the unit current cell of a current-steering D/A converter.

The most commonly used methods to extract the matching properties of a technology are bench-marked with respect to model accuracy, measurement accuracy and speed, and physical contents of the extracted parameters.

The physical origins of microscopic fluctuations and how they affect MOSFET operation are investigated. This leads to a refinement of the generally applied 1/area law. In addition, the analysis of simple transistor models highlights the physical mechanisms that dominate the fluctuations in the drain current and transconductance.

The impact of process parameters on the matching properties is discussed.

The impact of gate line-edge roughness is investigated, which is considered to be one of the roadblocks to the further down-scaling of the MOS transistor.

Matching Properties of Deep Sub-Micron MOS Transistors is aimed at device physicists, characterization engineers, technology designers, circuit designers, or anybody else interested in the stochastic properties of the MOSFET.

This book is entitled Analog Design Essentials because it contains all topics of importance to the analog designer which are essential to obtain sufficient insights to do a thorough job.

The book starts with elementary stages in building up operational amplifiers. The synthesis of opamps is covered in great detail, such that lowest power consumption is always guaranteed. Many examples are included, operating at low supply voltages. Chapters on noise, distortion, filters, ADC/DACs and oscillators follow. These are all based on the extensive amount of teaching that the author has carried out both at universities and companies world-wide. All chapters have been drawn up specifically for self-study. They aim, however, at different levels of understanding. All start with elementary material. Most chapters also contain advanced material, especially from Chapter 9 onwards.

A new format is used for this book. This has the advantages that the material used for teaching is also the material used by the student, and that only one additional aspect is explained per slide. The student can thus easily monitor their progress in understanding.

It is hoped that this new format provides a better structure in both teaching and studying these essential topics in analog design.

Design of Wireless Autonomous Dataloggers IC''s reveals the state of the art in the design of complex dataloggers, with a special focus on low power consumption. The emphasis is on autonomous dataloggers for stand-alone applications with remote reprogrammability.

The book starts with a comprehensive introduction on the most important design aspects and trade-offs for miniaturized low-power telemetric dataloggers. After the general introduction follows an in-depth case study of an autonomous CMOS datalogger IC for the registration of in vivo loads on oral implants. After tackling the design of the datalogger on the system level, the design of the different building blocks is elaborated in detail, with emphasis on low power.

A clear overview of the operation, the implementation, and the most important design considerations of the building blocks to achieve optimal system performance is given. Design of Wireless Autonomous Dataloggers IC''s discusses the design of correlated double sampling amplifiers and sample-and-holds, binary-weighted current steering DACs, successive approximation ADCs and relaxation clock oscillators and can also be used as a manual for the design of these building blocks.

Design of Wireless Autonomous Dataloggers IC''s covers the complete design flow of low-power miniaturized autonomous dataloggers with a bi-directional wireless link and on-board data processing, while providing detailed insight into the most critical design issues of the different building blocks. It will allow you to design complex dataloggers faster. It is essential reading for analog design engineers and researchers in the field of miniaturized dataloggers and is also suitable as a text for an advanced course on the subject.

Low-Power Low-Voltage Sigma-Delta Modulators in Nanometer CMOS addresses the low-power low-voltage Sigma-Delta ADC design in nanometer CMOS technologies at both the circuit-level and the system level.

The low-power low-voltage Sigma-Delta modulator design at the circuit level is introduced. A design example is presented in this book. This design is the first published Sigma-Delta design in a 90-nm CMOS technology and reaches a very high figure-of-merit.

At the system level, a novel systematic study on the full feedforward Sigma-Delta topology is presented in this book. As a design example, a fourth-order single-loop full feedforward Sigma-Delta modulator design in a 130-nm pure digital CMOS technology is presented. This design is the first design using the full feedforward Sigma-Delta topology and reaches the highest conversion speed among all the 1-V Sigma-Delta modulators to date.