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High-Speed DSP and Analog System Design von Tran, Thanh T. (eBook)

  • Erscheinungsdatum: 15.04.2010
  • Verlag: Springer-Verlag
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High-Speed DSP and Analog System Design

High-Speed DSP and Analog System Design is based on the author's over 25 years of experience in high-speed DSP and computer systems and courses in both digital and analog systems design at Rice University. It provides hands-on, practical advice for working engineers, including: - Tips on cost-efficient design and system simulation that minimize late-stage redesign costs and product shipment delays - Emphasis on good high-speed and analog design practices that minimize both component and system noise and ensure system design success. - Guidelines to be used throughout the design process to reduce noise and radiation and to avoid common pitfalls while improve quality and reliability. - Hand-on design examples focusing on audio, video, analog filters, DDR memory, and power supplies. The inclusion of analog systems and related issues cannot be found in other high-speed design books. 'This book is an essential resource for all engineers either interested in or working on system designs. It was created by a recognized system design expert who not only teaches these principles daily but who brings years of hands on design expertise as the creator of some of the personal computer industries' most differentiated audio solutions' -Jim Ganthier, Vice President of Marketing and Solutions, Industry Standard Servers- Hewlett-Packard 'This book helps designers by highlighting the pitfalls of high-speed systems design and providing solutions that improve the probability of success. Investing a small amount of time in the use of low-noise and low-radiation design methods from the very beginning of the development cycle will generate a high payoff by minimizing late-stage redesign costs and delays in the product ship date. To improve the probability of design success, applying the rules outlined in this book is a must-do.'-Gene Frantz, Principle Fellow, Texas Instruments Incorporated. High-Speed DSP and Analog System Design is appropriate for advanced undergraduate and graduate students, researchers and professionals in signal processing and system design. DR. THANH TRAN has over 25 years of experience in high-speed DSP, computer and analog system design and is an engineering manager at Texas Instruments Incorporated. He currently holds 22 issued patents and has published more than 20 contributed articles. He is also an adjunct faculty member at Rice University where he teaches analog and digital embedded systems design courses. Tran received a BSEE degree from the University of Illinois at Urbana-Champaign, Illinois in 1984 and Master of Electrical Engineering and Ph.D. in Electrical, Engineering degrees from the University of Houston, Houston, Texas in 1995 and 2001 respectively.

Produktinformationen

    Format: PDF
    Kopierschutz: AdobeDRM
    Seitenzahl: 217
    Erscheinungsdatum: 15.04.2010
    Sprache: Englisch
    ISBN: 9781441963093
    Verlag: Springer-Verlag
    Größe: 7640 kBytes
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High-Speed DSP and Analog System Design

" 3 Effects of Crosstalk (p. 31-32)

In any electronic systems, it is not practical nor is it necessary to eliminate all the noise, as noise is not a problem until it interferes with the surrounding circuitries or radiates electromagnetic energy that exceeds FCC limits and or degrades the system performance. When noise interferes with other circuits it is called crosstalk.

Crosstalk can be transmitted through electromagnetic radiation or electrically coupling, such as when unwanted signals propagate on the power and ground planes or couple onto the adjacent circuits. One of the most challenging problems designers are facing in today's electronic systems is to determine the source of crosstalk, especially in the case where crosstalk randomly causes system failures. Because components are so tightly packed into a very small printed circuit board (PCB). This chapter outlines the crosstalk mechanisms and design methodologies to minimize the effects of crosstalk.

3.1 CURRENT RETURN PATHS

In designing a system, it is crucial for designers to understand the current return paths as these current returns are the main sources of electromagnetically and electrically coupling. For example, the digital signal current return crosses the analog section of the design and causes noise on the analog waveforms or the current return generates a large current loop area which radiates onto the adjacent circuitries. Current returns follow different paths depending on their frequency.

A high frequency current flow tends to concentrate on the surface of the conductor as supposed to distribute uniformly across the conductor like a low frequency current. This phenomenon is known as skin effect and it modifies the current distribution and changes the resistance of the conductor. Due to skin effect, signals above 10 MHz tend to follow one return path while those below 10 MHz follow another.

The low-speed signal current returns on the path of least resistance, normally the shortest route back to the source as shown in Figure 3.2. In Figure 3.1, the high-speed signal current, on the other hand, returns on the path of least inductance, normally underneath the signal trace. Knowing the current return paths is important for designers to optimize the system design to reduce crosstalk."

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