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

Class D Switching Power Amplifiers and Power D/A conversion

BCA filter
BCA filter
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 17th February 2008, 04:34 PM   #1
lumanauw is offline lumanauw  Indonesia
diyAudio Moderator Emeritus
 
lumanauw's Avatar
 
Join Date: Oct 2002
Location: Bandung
Send a message via Yahoo to lumanauw
Default BCA filter

I try to simulate a simple half bridge LC filter, L=22uH, C=1uF, load=4ohm.
Attached Images
File Type: jpg lc.jpg (16.8 KB, 192 views)
  Reply With Quote
Old 17th February 2008, 04:35 PM   #2
lumanauw is offline lumanauw  Indonesia
diyAudio Moderator Emeritus
 
lumanauw's Avatar
 
Join Date: Oct 2002
Location: Bandung
Send a message via Yahoo to lumanauw
The response is like this
Attached Images
File Type: jpg lcresponse.jpg (34.5 KB, 162 views)
  Reply With Quote
Old 17th February 2008, 04:35 PM   #3
lumanauw is offline lumanauw  Indonesia
diyAudio Moderator Emeritus
 
lumanauw's Avatar
 
Join Date: Oct 2002
Location: Bandung
Send a message via Yahoo to lumanauw
Now I add 2 diodes and 1 extra inductor, to make a BCA output stage.
Attached Images
File Type: jpg lcbca.jpg (23.1 KB, 201 views)
  Reply With Quote
Old 17th February 2008, 04:38 PM   #4
lumanauw is offline lumanauw  Indonesia
diyAudio Moderator Emeritus
 
lumanauw's Avatar
 
Join Date: Oct 2002
Location: Bandung
Send a message via Yahoo to lumanauw
Why is the response become like this? The peak is about +18.5dB.
What is wrong with my SIM? Changin the values of L or C don't help.
Attached Images
File Type: jpg lcbcaresponse.jpg (36.5 KB, 161 views)
  Reply With Quote
Old 17th February 2008, 05:28 PM   #5
Workhorse is offline Workhorse
diyAudio Member
 
Workhorse's Avatar
 
Join Date: Dec 2004
The Gate drive to both devices in BCA is always in phase and hence the devices conduct simuntaneously!! whereas your diagram shows simple complementary halfbridge, in which device conduction is based on appropriate polarity of signal with respect to channel polarity of device
Also the inductors used in BCA are atleast 220uH not 22uH.
  Reply With Quote

Reply


BCA filterHide 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
need help wana change 60-Hz twin-T notch filter to 279 Hz filter prorms Solid State 0 10th February 2008 12:38 AM
Can Zaphs notch filter be used without the BSC filter? GuyPanico Full Range 0 21st July 2007 02:27 AM
Just one big filter cap or more smaller filter caps ... beppe61 Power Supplies 2 18th July 2006 06:46 PM
active filter from rod elliot and sub filter questions wuffer Parts 0 2nd October 2005 02:12 PM
chassis-mounted filter or IEC plug filter jarthel Solid State 7 11th March 2002 11:17 AM


New To Site? Need Help?

All times are GMT. The time now is 10:02 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki