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Texas Instruments and Arrow Electronics Present Live Analog eLab Webcast on Digital Audio Modulation Techniques

Aug 23, 2006

DALLAS (August 23, 2006) -- Texas Instruments Incorporated (TI) (NYSE: TXN) and Arrow Electronics, Inc. (NYSE: ARW) will present a live Analog eLab Webcast for designers entitled "Class-D Audio Power Amplifiers: Operation, Efficiency and EMC" on Wednesday, September 6, 2006, at 11:00 a.m. CDT (18:00 hrs CET). During the online discussion, TI analog expert Bill Klein, P.E., and eLab panelists Stephen Crump of TI and David Schmidt of Arrow will talk about the operation and efficiency of Class-D amplifiers with special focus on Class-BD modulation. In addition, they will discuss elements of electromagnetic compatibility (EMC) testing, filter component characteristics and proper PCB layout. Engineers are invited to register for the one-hour session at www.ti.com/analogelab.
Webcast panelists will provide an overview of Class-D audio power amplifiers that use switched output devices to produce power with high efficiency. There are a variety of ways to control the switching patterns. One technique that will be highlighted is Class-BD modulation, which permits operation without an output filter in many applications, thereby reducing cost and complexity.
In addition, panelists will discuss benefits of Class-D amplifiers and compare efficiency, heat generation and battery life with Class-AB amplifiers. Knowing the difference between the amplifiers is key to successful designs for handheld devices.
During the lab segments, Klein and Crump will demonstrate how to achieve EMC through a better understanding of electromagnetic interference (EMI) filter component characteristics and PCB layout principles. They will use a working EMI chamber to illustrate EMI testing.

Analog eLab Engineers

Bill Klein, P.E., is the host for the TI Analog eLab Webcast. Klein is a senior applications engineer with the high performance linear division of TI. He joined TI through its acquisition of Burr-Brown in August 2000. Klein is the author of more than 50 magazine articles, application notes and conference papers. His experience as an analog circuit designer covers 30 years in fields ranging from mineral exploration to nuclear medical imaging.

Stephen Crump is an applications engineer for TI's audio power amplifier group based in Dallas. He works closely with customers, analyzing applications and providing training. In addition to qualifying new products for market, he is also working on improving audio quality, EMC practices and filter efficiency.

David Schmidt joined Arrow Electronics in 2000 as a field applications engineer. His previous work experience ranged from designing personal computers, pay phones and amusement devices to specializing in industrial control electronics. Schmidt earned a BSEET from DeVry Institute of Technology.

To view previous Analog eLab Webcasts, visit 


. In addition to eLabs, TI offers analog engineers a wide-ranging support infrastructure that includes training and seminars, design tools and utilities, technical documentation, evaluation modules, an online knowledge base, a product information hotline and a comprehensive offering of samples that ship within 24 hours of request. TI keeps the engineer in mind throughout the design process by providing tools, systems expertise and technical support to help customers get to market quickly. For more information on TI's complete analog design support see 


. To learn more about Arrow's North American Components Group, see