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1999-06-01 The practical side of switching audio power amplifiers
This paper will review existing amplifier technologies, explain basic theory behind switching amplifiers, discuss some switching amplifier design points and compare the efficiencies of three amplifier types.
2012-06-13 TDF8597, TDF8599A, TDF8599B class-D amps for automotive apps
Know the available application PCB and the I2C-bus control software.
2004-01-28 STMicro audio power amplifier delivers 200W
STMicroelectronics has developed a single-chip audio power amplifier that delivers 200W
2009-06-25 Stereo codec packs Class D speaker driver
Wolfson Microelectronics has releases the second device in its stereo chip line is being promoted as the industry's lowest power codec.
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.
2011-06-20 SoC streams four audio channels
Texas Instruments launched the 2.4GHz CC8530 RF SoC, which is designed to support streaming for up to four audio channels
2006-07-06 Ref design optimizes six-channel, Class D audio amp
International Rectifier's IRAUDAMP3 Class D audio reference design is a six-channel, 120W half-bridge Class D audio power amplifier.
2008-03-31 Programmable chips bring audio clarity to HDTVs
ADI has introduced two audio processors for HDTV sound that provide uninterrupted, high-fidelity audio connectivity from a variety of digital and analog home entertainment sources
2010-10-20 Power-efficient stereo audio codec for mobile Internet devices launched
Conexant offers new power-efficient stereo audio codec
2008-10-16 Power struggles: slashing power use in mobile audio
Portable media players and multimedia handsets are becoming more capable, in terms of their range and complexity of the functions provided to the consumers.
2010-08-24 Power MOSFETS suit car audio systems
The three DirectFET2 devices are optimized with low gate charge to improve total harmonic distortion and efficiency while low diode reverse recovery charge further improves THD and lowers EMI.
2010-03-24 Power management IC packs Class G codec
Dialog Semiconductor plc has is rolling out the DA9057system-level power management IC that includes a Class G codec
2004-05-27 Philips develops reference design for Class-D amps
Philips introduced a semiconductor reference design for what it claims as the industry's first high power, fully digital Class-D amplifier solution
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
2006-02-02 PAM unveils new Class-D audio amps
Power Analog Microelectronics announced the introduction of six Class-D audio amplifiers, including the new 2W family, and the expansion of its 1.2 W product offerings.
2007-02-08 National intros new Boomer class D audio amp
National Semiconductor has introduced the first product in its new line of Boomer class D audio amplifiers with integrated converter technology that eliminates the need for an external boost converter.
2004-11-05 National expands feature sets on audio subsystems
National launched two boomer audio subsystems that provide a wide variety of features for cellular phones and portable apps
2004-11-10 National Boomer audio subsystems suit portable apps
National launched two Boomer audio subsystems that provide a variety of features for cellular phones and portable apps
2011-05-09 Miniaturized audio IC enables slimmer gadgets
STMicroelectronics' Sound Terminal IC delivers the first audio system-on-chip, enabling ultimate slim-line style for heatsink-free 50W systems
2004-09-20 Micronas unveils family of single-chip audio processors
Micronas launched a new family of single-chip audio processors that contains two series
2008-03-03 Maximize Class-D driver benefits
Notes Alex Mihalka of International Rectifier, Class-D audio amplification circuits offer high efficiency and small size compared to the more prevalent linear Class-AB topology. Solid-state drivers that deliver 1A or more gate-drive current with 100V capability for driving half-bridge topologies to power levels of 500W into 8 ensure quality audio.
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.
2004-03-29 Maxim audio amps eliminate bulk heatsink designs
The 15W, mono, filterless, Class-D audio amplifier from Maxim Integrated Products eliminates the need for bulky, expensive heatsink designs.
2003-12-31 Maxim audio amplifiers eye PC displays
Maxim Integrated Products has introduced the MAX9713/MAX9714 mono and stereo class-D audio amplifiers.
2008-03-21 Managing EMI in Class D audio applications
In today's portable and consumer applications, space has become a premium and engineers are often required to eliminate enclosures and shielding, and suppress EMI and noise through other means such as better segregation at the circuit level.
2007-06-11 LX1725 15W X 2 30W BTL class-D audio amplifier
Class-D audio amplifiers basically are pulse width modulation (PWM) amplifiers; these types of amplifier require low pass filtering of the output to demodulate the PWM carrier.
2001-09-19 LX1720: AudioMAX high-efficiency class-D amplifier
This application note describes the use of the LX1720 controller chip as a high-efficiency stereo Class-D audio amplifier.
2006-09-21 Low-power stereo DAC delivers high audio quality
Wolfson Microelectronics has unveiled a highly efficient stereo DAC with integrated 1W Class D stereo speaker driver and capless headphone output offering outstanding audio quality.
2007-11-20 Leadis exec discusses class G technology
Leadis Technology's Jim Hauer, senior director for new business development, recently spoke with Vivek Nanda, EE Times-India editor, about the company's new class-G amplifier technology and product road map
2007-07-11 IR unrolls Class D audio amp reference design
International Rectifier has introduced the IRAUDAMP4 Class D audio power amp reference design.
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