current spike question - 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 13th December 2008, 08:50 PM   #1
foobar is offline foobar  United States
diyAudio Member
Join Date: Nov 2008
Default current spike question

I'm trying to design my first amplifier. I've been simulating my design with pspice, and the current signal that feeds from the input diff amp stage to the voltage amp stage has spikes and ringing at it's peaks. I'm wondering what could be causing these large spikes? Please see the attached image. Would these be considered parasitic oscillations in the current signal?

Attached Images
File Type: jpg cur.jpg (22.6 KB, 91 views)
  Reply With Quote
Old 13th December 2008, 09:32 PM   #2
diyAudio Member
darkfenriz's Avatar
Join Date: Jun 2004
Location: Warsaw
I guess it is correction for crossover distortion, which is normal.
Crossover distortion happens at zero crossing of the sine, but diff pair's output and output signal are phase shifted by 90 degs, because voltage stage is integrating.

  Reply With Quote
Old 14th December 2008, 07:49 PM   #3
foobar is offline foobar  United States
diyAudio Member
Join Date: Nov 2008
Thanks, that was it. It wasn't readily apparent from the plot of the output voltage, but I adjusted the output stage bias and that cleared up the current signal.
  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
OPT Voltage spike protection with zeners bigwill Tubes / Valves 8 17th July 2009 04:24 AM
spike from SG3525 jegandren Power Supplies 7 13th September 2008 03:23 PM
no spike protection allowed tryonziess Chip Amps 6 13th May 2007 05:52 PM
Speaker Spike bjackson Multi-Way 8 9th May 2005 01:12 AM
Anyone use these Spike Feet? m1abrams Multi-Way 2 22nd July 2004 06:54 PM

New To Site? Need Help?

All times are GMT. The time now is 01:32 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