28 Oct '11, 5pm

Building my own Class D amp is one of the top five geeky things to do before I die.

Building my own Class D amp is one of the top five geeky things to do before I die.

Today almost all of the audio amplifier market, from cheap cellphone chips to unbelievably expensive home hi-fi, is split between class-D and class-AB amplifiers; the latter are the long-established technology, and they still dominate in home audio and also in mobile music players, including iPods, MP3s, and smartphones. Those pocket players use micropower amps, which put out fewer than 100 milliwatts per channel. Class-D chips are available for these applications, but they can't yet match the price of the class-AB chips that are available for a few cents per chip from such giants as National Semiconductor, Maxim, Texas Instruments, Sanyo, and various Taiwanese companies. Millions of those amps are sold every year. And class-AB isn't even the only other competitor in this fast-growing field: Class-G amp chips share class-D's high efficiency and are also supposedly easier t...

Full article: http://spectrum.ieee.org/geek-life/tools-toys/classd-audi...

Tweets

Top Ten Things to Eat in Singapore: The Hawker ...

ieatishootipost.sg 30 Oct '11, 2am

I have been asked on many occasions by overseas visitors for suggestions on what to eat when they visit Singapore. After w...

We do this in #OTTAWA but like this

mcdelivery.com.sg 29 Oct '11, 6pm

Sorry, the menu has already expired. If you'd like to continue ordering, click "Next". Click "Cancel" to cancel the order.

RIM Hit With Class Action Lawsuits:

spectrum.ieee.org 27 Oct '11, 8pm

is reporting today that BlackBerry maker Research-in-Motion was hit with two class action lawsuits yesterday, one filed in...

Five things to do for Deepavali

Five things to do for Deepavali

timeoutsingapore.com 25 Oct '11, 3am

Traditionally celebrated by Hindus, Buddhists, Sikhs and Jains during the period after the monsoon season, Deepavali is on...

SparkFun is looking to open source everything possible in its business

SparkFun is looking to open source everything p...

sparkfun.com 27 Oct '11, 4pm

Open Source ALL the Things! by Frencil | October 27, 2011 | 15 comments For a time now SparkFun has been making a name for...

Are you driving one of the top 5 green cars of 2012?

Are you driving one of the top 5 green cars of ...

earth911.com 28 Oct '11, 4pm

The all-electric 2012 Mitsubishi i is one of the five finalists for Green Car Journal’s 2012 Green Car of the Year award. ...

Greg Barker’s Speech for Solar Power UK: 27 Oct...

decc.gov.uk 27 Oct '11, 1pm

Greg Barker’s Speech for Solar Power UK 27 October 2011 Check Against Delivery SCENE SETTING Five years ago I wrote Power ...