Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

Amp power supply
Amp power supply
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 6th July 2008, 04:14 AM   #1
siming.guo is offline siming.guo  Canada
diyAudio Member
Join Date: Jun 2008
Default Amp power supply

I'm very new at this, so this question may be very stupid.
While researching, I found many circuits for amps and filters that people made where the power supply provided only a positive voltage in addition to ground. I was under the impression that the sound signal from the computer was composed of sine waves, which have both positive and negative components. How can a circuit or chip that only has a positive rail amplify both the positive and negative parts of the signal?
  Reply With Quote
Old 6th July 2008, 11:36 AM   #2
pacificblue is offline pacificblue  Germany
diyAudio Member
Join Date: May 2008
By using the ground as the negative rail and creating a virtual ground at half the positive rails voltage.

Nationals application notes usually offer one example of how to do that with a transistor and a few resistors and capacitors. Some ICs, e. g. TDA2030 have that circuitry built in.
  Reply With Quote


Amp power supplyHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Split Voltage Switching Power Supply for Power Amp vectorplane Swap Meet 2 23rd April 2011 11:48 PM
LTspice tool for power amp power supply component evaluation andy_c Software Tools 2 23rd August 2009 05:10 PM
Can i use a computer power supply to power audio amplifiers? destroyer X Solid State 91 25th September 2006 04:36 AM
selling high current power supply for power amps. ericpeters Swap Meet 0 14th January 2005 02:21 PM
heater supply (xformer specs are 6.3V 2.5A) as supply for a power LED? jarthel Tubes / Valves 10 21st July 2003 01:30 PM

New To Site? Need Help?

All times are GMT. The time now is 05:14 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio