Audio DesignLine Highlights

Audio Design Features

Prediction and negative-delay filters: Five things you should know

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Making sounds with analogue electronics - Part 5: Using analogue synthesis

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EMC Basics #13: EMC shielding--destroying a shield

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SIGNAL CHAIN BASICS #60: Clock jitter demystified–random jitter and phase noise, Part 2

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Generating spatial audio from portable products - Part 1: Spatial audio basics

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Making sounds with analogue electronics - Part 4: Voltage-controlled amplifiers

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ADC Guide, Part 1: the ideal analog/digital converter

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Top "Planet Analog" articles for 2011 (Part 2 of 2)

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Generate dual supply rails using a high-efficiency SEPIC-Ćuk converter

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Hi-fi digital audio streaming comes of age

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Audio converter subsystem design in the 21st century – Part 1: Overview

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Designing capacitive sensing for a specific application (Part 1 of 3)

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Making sounds with analogue electronics - Part 3: Envelopes

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Understand and reduce DC/DC switching-converter ground noise

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EMC Basics #12: Shielding materials solve electromagnetic-compatibility issues

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The A-Z steps for building a mixed-signal SOC, Part 4: System design

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SIGNAL CHAIN BASICS #59: Saving power and minimizing heat with power supply volume control

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Making sounds with analogue electronics - Part 2: Subtractive synthesis

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Simple ways to manage different clock frequencies of audio codecs

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EMC Basics #11: An introduction to EMC shielding

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How to design a traditional radio

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Making sounds with analogue electronics - Part 1: Before the synthesizer

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Selecting audio amplifiers for mobile devices

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Understanding noise, ENOB, and effective resolution in analog-to-digital converters

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EMC Basics #10: EMC troubleshooting and power disturbances

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Acoustic software streamlines truck cabin noise mitigation

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Balancing gain-bandwidth product vs quiescent current for dissipation optimization

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Op amps in small-signal audio design - Part 4: Selecting the right op amp (JFET-input types reviewed)

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Product How-To: 350W + 350W Class D power amp in the size of an iPod

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Which filters are noisier – analog or digital? (Part 2)

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EMC Basics #9: Troubleshooting RFI EMC problems

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Speech recognition cuts driver distraction

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Which filters are noisier: analog or digital? (Part 1)

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Calculating power loss in switching MOSFETs

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Op amps in small-signal audio design - Part 3: Selecting the right op amp

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Pro audio techniques applied in mobile devices to improve sound quality

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Going through a mixed-signal SOC design, from A to Z: defining the concept

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EMC Basics #7: An introduction to troubleshooting EMI problems

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EMC Basics #8: An introduction to troubleshooting EMI problems (con't)

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Wireless automotive audio uses minimum power, bandwidth

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Automotive wireless is more than cell phones and music

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Bob Pease on audio

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Audio quality improvement for mobile-device loudspeakers

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Op amps in small-signal audio design - Part 2: Distortion in bipolar and JFET input op-amps

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Reference Designs

Products

Reference design for licence-free radio microphones based on DECT

Ethernet AVB development kit for open network standard automotive infotainment applications

CES: Conexant introduces new low-power, high-definition audio codecs for mobile apps

Clock oscillator has a phase noise of -100 dBc/Hz at 10Hz offset for audio equipment

Class-D audio amplifier exhibits power density of 3.2-W/mm-square

Audio amplifier measures just 1mm x 1mm

Audio DSP IP core improves performance in audio post processing and voice apps

CES: Frontier Silicon network audio module features dual-band 802.11n connectivity

Huawei's MediaPad Now Comes with Android 4.0

Web-based software package optimizes the selection of multilayer capacitors

Toolset eases software porting to Tensilica-based multicore SOCs

Film capacitors offer wide range with low insertion height

16-channel audio DAC boasts high-performance at lower power

USB audio decoder IC offers versatile audio playback benefits

NXP claims breakthrough Class-AB and Class-D audio amplifiers for start-stop systems

New HD audio PC solution offers 5x better audio quality

Die-cast enclosures in three interesting new shapes

Advanced car radio tuner IC family reduces cost and complexity

Spatial audio IC simplifies soundstage design in portables

Digital audio MCU/firmware platform offers 'plug-and-play' capability

FM background receiver chips enable cost-effective data functions in car radios

Dual core Mini-ITX Mainboard for Digital Home Media

CEVA-TeakLite-III DSP IP core approved for Dolby MS11 Multistream Decoder

MEMS microphone smoothes the way to natural voice control in smart consumer devices

HDMI test option available on 2-channel analyzers

HD Brilliance broadcast BNC connectors with locking collar

Two-microphone wireless audio reference design kit

A/V decoder for surveillance apps integrates audio DAC

TI introduces wireless audio products with USB support

Low-cost audio processor eliminates need to write or license audio algorithms

Low profile piezoceramic audio speakers are 4.5mm thin

2.4GHz wideband/HD voice quality for cordless phones

Digital filter design wizard for FIR and IIR filter implementations

Audio SoC debuts with ARM technology

Murata develops thin, low-ESR electrical double-layer capacitors

USB audio/video codec in 38x70mm footprint

Audio analyzer with new digital audio interface options

0.5mm thin piezoelectric speaker

8.85x2mm miniature slide switch with auto-return slider

Efficient power conversion development board for systems using eGaN FETs

Commentary

There are quick ways to separate the real techies from wannabes

Join  post comment   62 comments    last comment  larsen
Any arguments are good as long as the candidate can justify them. Taking such considerations as the ...
How does today's do-it-yourself experimenter situation compare to "back in the day"?

Join  post comment   33 comments    last comment  me
This is the golden age of DIY, enabled by fast infomation exchange and low cost manufacturing ...
Some recent audio-related items that caught my eye include a Fast(er) Fourier Transform, a new study on the 'iPod generation' and MP3 sound, a poll on younger listeners and LPs, and a 'circuit' diagram that's reminiscent of some DIY audiophile designs.

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Every year when the January CES rolls around I have a complex set of emotional reactions: anticipation about the new gadgets, resignation that there will always be some flaw or oversight that spoils the pleasure of using them, and resentment that the problems could have been avoided.

Join  post comment   8 comments    last comment  Bernard Cole
Regarding cell phones and their reliability. As a diabetic all my life, the cell phone gives me ...
For a large range of use cases, MIT researchers have found a way to increase the speed of one of the most important algorithms in the information sciences…

Join  post comment   2 comments    last comment  Mr Intel
Great reading the power and flexibility of using FFTs has always fascinated me. Thanks for sharing.
Here are the top ten (most popular) technical articles on Audio Designline during 2011.

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Checkpoint, Cadence, IP-Maker, Tensilica, Mentor Graphics and John Sanguinetti made the lineup today. See here for their news…

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I live in New Hampshire. There are several things that happen regularly here.

Join  post comment   18 comments    last comment  divide_by_zero
I should have kept my old '82 VW diesel car. That machine could be started by letting it roll ...
Those odd plug A-to-socket B adapters solve connection “diversity” issues

Join  post comment   16 comments    last comment  Frank Eory
I was just thinking the same thing. Back in the 80s I was doing RF and microwave work and had a ...
Here are some short videos from the recent AES show floor, highlighting demos of some audio analyzers, a low-cost USB DSP kit, a TV/radio dialogue enhancement technology, and a "Pro Audio in a Box" platform.

Join  post comment   1 comment    last comment  Maurizio.Brignoli
Nice tour at AES!.. thank you
A photo gallery from the show floor of the recent 131st AES Convention in NYC includes photos of everything from exhibits and audio product demos to audio publications and even an electromechanical Rastafarian!

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Those of you who know me, know that I have a keen interest in the ultra low power wireless market.

Join  post comment   3 comments    last comment  joyhaa
would like to order a kit, however no link on their site for order
In one of my many stints of developing electronic gizmos as a contractor for the government, I was asked to build a transport device that would take in analog audio, transport it a distance, and then output it in a proprietary digital link format.

Join  post comment   3 comments    last comment  ReneCardenas
Good article, and comes as no surprize that anything that has to be procured with more than a simple ...

Guest Column: Amplifier Trends 2012 — the evolving op amp

Steve Sockolov, Director, Linear and RF Core Marketing, Analog Devices, Inc.

Amplifiers are the hidden heroes of any system, and often unappreciated even as their role changes and expands.

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Looks like the mechanical engineers trumped the EEs this time...

Join  post comment   10 comments    last comment  katgod
Great prank, but what do you think he learned, don't trust your room mates?

I’m in love!

Clive Maxfield

I just treated myself to a new pair of noise-cancelling headphones that have me tap-dancing down airplane isles with joy…

Join  post comment   24 comments    last comment  dariinho
I use these all the time, they get rid of the noise really ...
If choosing a front panel design for a headphone amplifier would you go with a creative, unique look or something more traditional and functional?

Join  post comment   8 comments    last comment  sharps_eng
There is a serious angle to this; if you are using this as a learning project or selling it openly, ...
There's no shortage of interesting audio-related apps for the iPhone and iPad - everything from audio test instruments to music creation tools to games - and some can even be had for free.

Join  post comment   1 comment    last comment  sharps_eng
Let us not overlook Android - but as an iPhone developer I would say that the app world is the new ...
My old chum Alvin just emailed me to say that he is really impressed with an iPad app called iCircuit...

Join  post comment   9 comments    last comment  Max the Magnificent
I guess the main reason is I don't have an Android tablet -- but for those that do this sounds very ...
It turns out that it wasn’t Alexander Graham Bell, but one Antonio Meucci, “An erratic, sometimes brilliant Florentine inventor,” who invented the telephone.

Join  post comment   19 comments    last comment  StephenJ
Stupid Patent Office Syndrome. If multiple people invent the same thing at about the same time one ...
With the launch of Datasheets.com, EDN and UBM Electronics provide engineers access to over 185 million parts, with features such as comparison, parametric search, search save, and alerts.

Join  post comment   22 comments    last comment  Dr DSP
It seems like the next phase of this effort needs to be driven by suggestions from users on the ...
When it comes to audio listening enjoyment, it isn't always about the specs.

Join  post comment   12 comments    last comment  kdboyce
If you make and sell audio products, you had better get the 'objective' numbers right. They provide ...
This is an audio circuit that generates interference when someone speaks loudly – it provides a way to “train” your colleagues to speak in a softer tone.

Join  post comment   15 comments    last comment  Bellhop
I'm sure that one could be built from descriptions of the device in operation. Remember, though, ...
What happens to the profession when we die?

Join  post comment   74 comments    last comment  Sam Beal
"knowledge meme" Everyone that Ritchey and Zasio taught/inspired/enlightened (like me) will remember ...
The latest audio-related items that recently caught my eye include free listener training software, a look back at the life and work of a computer music pioneer, and more "audiophoolery" - this time in a column at Slate.

Join  post comment   1 comment    last comment  kdboyce
The article Rich refers to contained the following additional author comment: "By contrast, with ...
With iCloud, Apple and Google have met in the middle for what will be quite a battle for the hearts and minds of the technorati.

Join  post comment   43 comments    last comment  LarryM99
Cloud computing or even more prosaic online storage can be very useful as long as the Internet ...

Recent Comments

Daryl Gerke  02.04.2012
Interference-cost tradeoffs and cheating
Thanks for the kind comments on our EMC series. For me, it all started with a ham license. Fifty ...
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Most Commented

Reader Message Boards

What is Apple investing $3.9 billion in?

By rick.merritt on 01.18.2011

Apple COO Tim Cook just finished a quarterly earnings call in which he said Apple has struck long term supplier agreements worth $3.9 billion over two years.

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last comment   02.08.2011  DrOctavius
My opinion is they've been investing and buying ARM's shares, to own the company :)

If you work in audio hardware design, I'm sure there are times when you've wanted to actually hear the results of a particular signal processing task -- to hear

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last comment   05.06.2011  goafrit
Congrats on the award

Looking for audio designer to design an updated amplifier/pre amp for a vintage electric piano. If interested, let us know and we can discuss details.

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last comment   07.20.2010  kinnar
Why do you want to design a new preamp for a vintage preamp, you can use any avaliable preamps in ...

I am wondering how can we determine the class of amplifier just by looking at its operating voltage and current.

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last comment   07.25.2010  Bhola_#1
Thanks Dan for your informative comment. Yes, efficiency is a big factor since these devices goes ...

 

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The Audio DesignLine is edited by Rich Pell. Please contact rich.pell@ubm.com if you are interested in submitting a technical article or a guest blog.

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