TV2/Home Entertainment
Designing with Class D amplifier ICs
Class D audio amplification is becoming the solution of choice in consumer audio, by enabling long battery life and compact dimensions. However, designers must take care to avoid complexity elsewhere in the system, including the power supply, output filtering and input signal conditioning.
PRODUCT HOW-TO: Differential line driver with excellent load drive
Here's how to reduce the effects of capacitive and low-impedance loads by including a high-speed, high-output-current buffer inside the op amp feedback loop.
Reduce EMI by varying power supply frequency
By varying the switching frequency, you can convert narrowband noise to broadband, and effectively attenuate harmonic peaks that can cause a design to fail EMI emission tests.
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Portable Audio
Designing with Class D amplifier ICs
Class D audio amplification is becoming the solution of choice in consumer audio, by enabling long battery life and compact dimensions. However, designers must take care to avoid complexity elsewhere in the system, including the power supply, output filtering and input signal conditioning.
Esolo "MP4": Apple Nano clone adds some extras
External branding of the multimedia player is Esolo, from a Houston-based importer Esolo Digital who claims to be aligned with "over 100 factories in China".
Reduce EMI by varying power supply frequency
By varying the switching frequency, you can convert narrowband noise to broadband, and effectively attenuate harmonic peaks that can cause a design to fail EMI emission tests.
See all Portable Audio »
Automotive Sound
The Future of Audio Entertainment in the Car - Part 1
The connection between user behavior and technology sometimes allows predictions as to which technology will be the next big thing and which one will prevail over a longer period. A study of chip vendor NXP provides valuable insights in automotive infotainment trends.
Compact, shock- and error-tolerant SSDs offer auto infotainment storage options
"Industrial-strength" solid-state drives eliminate time-consuming seek processes, provide write/read performance up to 30 MBytes/sec, as well as error checking and correction circuitry.
Making the best use of Class D amps in your car audio subsystem
The design challenge for automotive engineers is to maintain " or even to improve - the high audio amplification levels and low distortion that customers have been expecting.
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Digital/Satellite Radio
The Basics of MIMO Testing
A few key parameters and tests help engineers understand how a MIMO radio is performing
DSP Tricks: Frequency Translation Using Decimation
Richard G. Lyons, author of "Understanding Digital Signal Processing," provides a tip on doing frequency translation using decimation.
Understanding HD Radio: The program audio chain - Part 4
The fourth and final part of this excerpt from the recently released "The IBOC Handbook" concludes with a discussion of PSD Harmonization with RDS, PSD Transport and PSD metadata.
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Advanced Audio Processing
PRODUCT HOW-TO: Differential line driver with excellent load drive
Here's how to reduce the effects of capacitive and low-impedance loads by including a high-speed, high-output-current buffer inside the op amp feedback loop.
An off-beat take on sampling theory
Petre Petrov has some unusual ideas about sampling theory. Take a look and see what you think.
Tutorial: Line echo canceller (LEC) and DC offsets
DC offsets can ruin line echo canceller (LEC) performance, introducing noise into VoIP systems. Here's how to eliminate the problem.
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About the Audio DesignLine How-To Section
Audio DesignLine's How-To section delivers audio design tutorials and articles on designing audio electronics and audio processing functions for portable and home entertainment consumer electronics, professional audio, automotive sound, and digital/satellite radio.
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