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2005-09-12 Why Class D amplifiers may test well but often sound terrible
Class D amplifiers are fundamentally different from analog amplifiers, not only in their circuitry, but more importantly in the way they operate
2000-09-27 Utilizing class-D audio power amplifiers for high efficiency
New filterless modulation techniques eliminate the biggest limitation of using class-D amplifiers in portable equipment. Notebook computers, PDAs, mobile phones and battery-powered speakers are applications that could greatly benefit from the use of class-D amplifiers.
2012-11-14 Using class D amplifiers in portable apps
Find out how to reduce EMI and maintain high efficiency with class D amplifiers in portable applications.
2007-09-21 Tiny Class D audio subsystem touts high output power
Maxim Integrated Products has introduced a Class D audio subsystem that combines a mono Class D amplifier, a DirectDrive headphone amplifier and a DirectDrive mono receiver amplifier
2006-01-09 TI's Class D amps generate less heat
Texas Instruments announced its first digital amplifiers designed to meet the high reliability and unique requirements of the automotive market
2008-07-04 TI says amplifiers slash audio expense for HDTVs
Texas Instruments Inc. introduces its second-generation, 15W stereo analog-input Class-D amplifiers with single-ended outputs.
2009-09-04 The real story about closed-, open-loop Class D amps
This article reviews the traditional method of measuring PSRR and explains why it's ineffective in measuring the effects of power supply ripple in BTL Class D amplifiers.
2012-06-13 TDF8597, TDF8599A, TDF8599B class-D amps for automotive apps
Know the available application PCB and the I2C-bus control software.
2007-06-01 Sound advice on Class D audio amps designs
Audio designers need to pay attention to many details when they are building high-performance Class D audio amplifiers, including the choice of output transistor size, output stage protection, modulation technique and filter topology. EMI reduction and system cost must also be considered along with the desired sound quality.
2008-01-17 Perform thermal tests on Class D amps
There are two kinds of amplifiers used to generate the output power, class AB and class D amplifiers. The shift to class D was mainly the result of the introduction of flat-screen LCD and plasma TVs, in which space was limited and heat dissipation became an issue. Since the thermal test standards were developed when only class output power AB was used, we want to investigate if they are still appropriate for class D.
2005-12-13 Maxim Class D amp targets flat-panel display apps
Maxim introduced a high-power, highly efficient, Class D amplifier optimized for flat-panel display applications, including LCD and PDP televisions and home audio equipment
2003-12-31 Maxim audio amplifiers eye PC displays
Maxim Integrated Products has introduced the MAX9713/MAX9714 mono and stereo class-D audio amplifiers.
2004-07-02 IR rolls out driver IC for Class D amps
International Rectifier unveiled a high- and low-side MOSFET driver IC for 100W to 1,000W Class D audio amplifier circuits
2004-12-13 IR MOSFET improves Class D audio performance
International Rectifier recently released the IRF6665 DirectFET MOSFET for medium power Class D audio amplifiers.
2010-01-08 Integrated Class-D audio amps deliver 600W
Audio bandwidth over 73kHz achieves HD media playback in Blu-ray home theater systems and other apps.
2002-07-01 Improving audio with Class D amplifiers
Class D amplifiers employing pulse width modulation are popular because of their efficiency and simplicity in improving audio systems.
2004-12-01 Hearing, seeing the sound of change: From analog to digital audio amplifiers
Digital amplifier systems keep audio signal in the digital domain virtually all the way to the speaker; analog-based systems convert the signal to analog early in the process.
2006-08-03 Freescale Class D amp enables HiFi audio
Freescale has unveiled the new Symphony Class D amplifier the promises a high-fidelity system solution
2010-08-05 Filterless Class D amps offer anticlipping
A family of filterless Class D amplifiers integrates anticlipping circuitry that avoids clipping by automatically reducing the amplifier's gain when the supply voltage in insufficient to deliver the desired output voltage.
2005-07-18 Digital feedback pulls class D into high-end audio
Earlier this year, Zetex Semiconductors plc announced the development of an amplifier technology that it claims is so different that it warrants the creation of its own new class-one that Zetex calls "class Z
2007-10-18 Design Class D audio amps into portable applications (Part 2
To maximize the benefits of using Class D amps, it is important to understand the fundamental difference in operation between Class D and Class AB amplifiers, since each amplifier technology requires different considerations when designing systems that incorporate audio.
2007-09-05 Design Class D audio amps into portable applications (Part 1
To maximize the benefits of using Class D amps, it is important to understand the fundamental difference in operation between Class D and Class AB amplifiers, since each amplifier technology requires different considerations when designing systems that incorporate audio.
2006-01-13 Design and analysis of a basic class D amplifier
Deceptively complex, Class D amplifiers have a whole series of practical problems that must be overcome to achieve an acceptable result.
2009-04-01 Design 101: Class D amplifiers
Class D audio amplification is fast becoming the solution of choice in consumer audio because of its ability to extend long battery life and compact dimensions
2007-09-17 Class-D op amp boasts high efficiency, small size
Texas Instruments Inc. has introduced a monolithic, filter-free, Class-D audio power amplifier with an integrated boost converter, which provides constant output power for portable applications
2007-12-14 Class-D driver IP meets advanced SoC requirements
Chipidea has released a Class-D audio driver IP specifically designed for SoC devices manufactured in 65nm process and below
2006-09-08 Class-D audio power amps cuts PCB size by half
By integrating the external input resistors and very closely matching them, Texas Instruments said its new amps enable designers to reduce overall board size by approximately 50 percent.
2007-04-02 Class-D audio amps offer 64-step volume control
PAM has introduced what it touts as the industry's first 3W Class-D audio amps with integrated 64-step digital volume control featuring its patent pending "filter-free" next-generation architecture
2009-07-31 Class-D amps transform cars into concert halls
Extremely high dynamic audio range lets the class-D amplifier family improve in-car entertainment
2007-06-27 Class-D amplifiers target portable applications
Princeton Technology Corp. has launched its first 2.5W mono Class-D amplifier, the PT2333, specifically designed for mobile phones, GPS PNDs and portable media players
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