Discrete-time Signals and Systems - An Operator Approach

Author(s): Sanjoy Mahajan and Dennis Freeman, Massachusetts Institute of Technology
Publication Date: 2009

Excerpts from the Preface:

Quote:
This book aims to introduce you to a powerful tool for analyzing and designing systems – whether electronic, mechanical, or thermal. This book grew out of the "Signals and Systems" course (numbered 6.003) that we have taught on and off to MIT's Electrical Engineering and Computer Science students.

The traditional signals-and-systems course – for example [17] – emphasizes the analysis of continuous-time systems, in particular analog circuits. However, most engineers will not specialize in analog circuits. Rather, digital technology offers such vast computing power that analogy circuits are often designed through digital simulation.

Digital simulation is an inherently discrete-time operation. Furthermore, almost all fundamental ideas of signals and systems can be taught using discrete-time systems. Modularity and multiple representations , for example, aid the design of discrete-time (or continuous-time) systems. Similarly, the ideas for modes, poles, control, and feedback.

Furthermore, by teaching the material in a context not limited to circuits, we emphasize the generality of these tools. Feedback and simulation abound in the natural and engineered world, and we would like our students to be flexible and creative in understanding and designing these systems. Therefore, we begin our "Signals and Systems" course with discrete-time systems, and give our students this book. A fundamental difference from most discussions of discrete-time systems is the approach using operators. Operators make it possible to avoid the confusing notion of "transform". Instead, the operator expression for a discrete-time system, and the system's impulse response are two representations for the same system; they are the coordinates of a point as seen from two different coordinate systems. Then a transformation of a system has an active meaning: for example, composing two systems to build a new system.

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Solid-State Physics for Electronics

Solid-State Physics for Electronics 

Wiley-ISTE | June 2009 | ISBN: 9781848210 | 432 pages | PDF | 2 mb

This title is the result of many years’ experience in teaching at MSc level in applied, materials and electronic physics. It is written with device physics and electronics students in mind, and describes the fundamental physics of materials used in electronics. This thorough coverage of the physical properties of materials will facilitate an understanding of the technological processes used in the fabrication of electronic and photonic devices.

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Generalized Low-Voltage Circuit Techniques for Very High-Speed Time-Interleaved Analog-to-Digital Converters

Sai-Weng Sin, Seng-Pan U, and Rui Paulo Martins, "Generalized Low-Voltage Circuit Techniques for Very High-Speed Time-Interleaved Analog-to-Digital Converters"
S,,,ger | 2010 | ISBN: 9048197090 | 150 pages | PDF | 5,5 MB

Analog-to-Digital Converters (ADCs) play an important role in most modern signal processing and wireless communication systems where extensive signal manipulation is necessary to be performed by complicated digital signal processing (DSP) circuitry. This trend also creates the possibility of fabricating all functional blocks of a system in a single chip (System On Chip - SoC), with great reductions in cost, chip area and power consumption. However, this tendency places an increasing challenge, in terms of speed, resolution, power consumption, and noise performance, in the design of the front-end ADC which is usually the bottleneck of the whole system, especially under the unavoidable low supply-voltage imposed by technology scaling, as well as the requirement of battery operated portable devices. Generalized Low-Voltage Circuit Techniques for Very High-Speed Time-Interleaved Analog-to-Digital Converters will present new techniques tailored for low-voltage and high-speed Switched-Capacitor (SC) ADC with various design-specific considerations.

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