simple, hybrid Class D/G/H idea - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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
Reply
 
Thread Tools Search this Thread
Old 29th April 2009, 06:48 PM   #1
diyAudio Member
 
Join Date: Nov 2008
Default simple, hybrid Class D/G/H idea

I saw this:
My LM386 Speaks "D" ?

...and thought of driving some power transistors with it, to get more output power. A higher voltage supply for the power transistors could be made with a switching step-up supply, but I didn't want multiple oscillators and heterodyning problems, so the PWM amplifier is used as the oscillator.

This has the added benefit that the high voltage supply is modulated by the signal, as is done in class G/H and "envelope tracking" amplifiers.

I don't know if this would work (and in my laziness I left out some obvious things-input capacitor, output filter, output DC blocking of some kind, etc), but I am interested in feedback about the rough idea.


Important: op-amp is LM380 or LM386 audio power amplifier (inputs are ground referenced)

Click the image to open in full size.
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
One more hybrid idea sajti Tubes / Valves 6 26th January 2009 12:58 PM
Hybrid OTL Circlotron idea revintage Tubes / Valves 85 3rd September 2008 01:06 AM
My wacky idea for a hybrid horn loaded woofer/planar widerange hybrid loudspeaker. Spasticteapot Multi-Way 0 30th November 2006 05:16 AM
simple hybrid idea nobody special Tubes / Valves 17 21st May 2003 06:30 PM


New To Site? Need Help?

All times are GMT. The time now is 08:59 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2