output impedance testing - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

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 15th July 2007, 10:12 PM   #1
diyAudio Member
unclejed613's Avatar
Join Date: Dec 2006
Default output impedance testing

ok, i found out the ideal amplifier model in LTSpice has a small flaw. as a matter of fact it had an unexpected effect on my sim results, so i'm starting the whole process again with a different model. shown below are the original model, and the new model. the problem with the original model is that with the cap that sets GBW straight across the output, the GBW changes with low output impedances, so the new model on the right buffers the gain stage with a voltage controlled voltage source..... now it should work without shifting the open loop gain turnover frequency.......
Attached Images
File Type: jpg opampmodels.jpg (26.3 KB, 63 views)
Vintage Audio and Pro-Audio repair ampz(removethis)@sohonet.net
spammer trap: spammers must die
  Reply With Quote


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
Speaker Impedance Testing jaekfre Multi-Way 5 11th July 2009 01:19 PM
3C24 in a SE output stage - output transformer impedance recommendation !!! aldovan Tubes / Valves 15 6th September 2008 10:18 AM
Can An Output Transformer Change A Voltage Amp's Output Impedance From 0.1 To 47 Ohms kelticwizard Everything Else 11 25th March 2007 05:17 AM
Testing transformer output DieterD Solid State 12 9th January 2002 01:45 PM
Testing JLH, zero DC output? chris ma Solid State 0 4th September 2001 03:50 PM

New To Site? Need Help?

All times are GMT. The time now is 01:05 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2