PWM signal to Audio signal possible? - 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 11th November 2008, 04:56 AM   #1
diyAudio Member
 
Join Date: Aug 2006
Send a message via Yahoo to thx_dts71
Default PWM signal to Audio signal possible?

hello everybody,

can u help me convert PWM signal from this HT processor to
produce audio signal.
here's the block diagram of PS9818

Click the image to open in full size.

what i'm gonna do is, to extract the audio signal from the PWM modulator.i dont intend to use the 6ch switching power stage.
i already have a DIY-mosfet 6ch amp.

here's the processor:

Click the image to open in full size.
note that PWM 1 to 8.thats the output stage going to the 6ch switching power stage that i omitted.
some say, i should use LPF (low pass filter) to decode this signal.

is it possible?is anybody here have a LPF design suitable for this application.
pls help..
thanks!
  Reply With Quote
Old 11th November 2008, 10:22 AM   #2
Pafi is offline Pafi  Hungary
diyAudio Member
 
Join Date: May 2004
Location: Budapest
Quote:
some say, i should use LPF (low pass filter) to decode this signal.
is it possible?
Absolutely! The simplest one is for example a 3k3 resistor from the PWM output to the input of amplifier and a 1n5 capacitor in parallel with the input of the amp.
  Reply With Quote
Old 11th November 2008, 03:38 PM   #3
diyAudio Member
 
Join Date: Aug 2006
Send a message via Yahoo to thx_dts71
Quote:
Originally posted by Pafi


Absolutely! The simplest one is for example a 3k3 resistor from the PWM output to the input of amplifier and a 1n5 capacitor in parallel with the input of the amp.

ok brod.
do it look like this?

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
Best small signal BJT for DIY audio? OliverD Parts 1 5th April 2009 05:35 PM
How to distribute one audio Signal. moenviconer Everything Else 1 27th July 2008 10:22 PM
How do I turn an high current signal into a line level signal?? sardonx Tubes / Valves 8 27th August 2005 12:16 PM
Creating a differential signal from a single-ended signal for bridged amps Peter Daniel Chip Amps 45 8th November 2004 01:47 PM


New To Site? Need Help?

All times are GMT. The time now is 07:36 AM.


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