Power Management in Mobile Devices

1st Edition

Authors: Findlay Shearer
Paperback ISBN: 9780750679589
eBook ISBN: 9780080556406
Imprint: Newnes
Published Date: 7th December 2007
Page Count: 336
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Sealed Lead Acid…Nickel Cadmium…Lithium Ion… How do you balance battery life with performance and cost? This book shows you how!

Now that "mobile" has become the standard, the consumer not only expects mobility but demands power longevity in wireless devices. As more and more features, computing power, and memory are packed into mobile devices such as iPods, cell phones, and cameras, there is a large and growing gap between what devices can do and the amount of energy engineers can deliver. In fact, the main limiting factor in many portable designs is not hardware or software, but instead how much power can be delivered to the device. This book describes various design approaches to reduce the amount of power a circuit consumes and techniques to effectively manage the available power.

Power Management Advice On: Low Power Packaging Techniques Power and Clock Gating Energy Efficient Compilers Various Display Technologies Linear vs. Switched Regulators Software Techniques and Intelligent Algorithms

Key Features

  • Addresses power versus performance that each newly developed mobile device faces
  • Robust case studies drawn from the author's 30 plus years of extensive real world experience are included
  • Both hardware and software are discussed concerning their roles in power


RF/wireless engineers and designers, Engineers designing mobile devices such as PDAs and games; Engineering managers, Graduate students

Table of Contents

  1. Introduction to Power Management in Portable Personal Devices 1.1. Power Trends 1.2. Mobile Devices and Applications 1.2.1. Cellular Phones 1.2.2. Portable Media Players 1.2.3. Portable Digital Audio Players 1.2.4. Portable Navigation Devices 1.3. Cellular Handsets – Deeper Dive 1.3.1. Cellular System Overview 1.3.2. Evolution of Cellular Systems 1.3.3. Cellular Handset Teardown 1.3.4. Seamless Mobility - Connectivity 1.4. Summary
  2. Chapter 2 – Hierarchical View of Energy Conservation 2.1. Issues and Challenges 2.1.1. Closing the Technology Gaps
    2.1.2. Always On, Always Connected – Paradox of the Portable Age 2.1.3. Balancing Battery Life with Performance and Cost 2.2. Power versus Energy Types 2.2.1. The Elements Power Consumption 2.2.2. Elements of Dynamic and Static Power 2.3. Hierarchy of Energy Conservation Techniques 2.4. Low Power Process and Transistor Technology 2.4.1. Process Technology Scaling 2.4.2. Transistors and Interconnects 2.5. Low Power Packaging Techniques 2.5.1. Introduction 2.5.2. Systems-in-Package (SiP 2.5.3. Package-on-Package 2.5.4. SiP versus PoP 2.6. Summary
  3. Low Power Design Techniques, Design Methodology and Tools 3.1.1. Dynamic Process Temperature Compensation 3.1.2. Static Process Compensation 3.1.3. Power Gating 3.1.4. State Retention Power Gating
    3.2. Low Power Architectural and Subsystem Techniques 3.2.1. Clock Gating 3.2.2. Asynchronous Techniques - GALS 3.2.3. Power Saving Modes 3.3. Low Power SoC


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About the Author

Findlay Shearer

Affiliations and Expertise

Senior Product Manager, Freescale Semiconductor, Texas, USA


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