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

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

node voltage analysis
node voltage analysis
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 19th November 2017, 09:03 PM   #1
helitim is offline helitim  Canada
diyAudio Member
 
Join Date: Dec 2015
Location: Newfoundland
Default node voltage analysis

Hi, I wasn't sure where to ask this...

Aside from understanding how it works, is node voltage analysis still commonly used in designing/ troubleshooting audio circuits? Or do we just leave it up to spice?

Last edited by helitim; 19th November 2017 at 09:07 PM.
  Reply With Quote
Old 19th November 2017, 09:13 PM   #2
MarcelvdG is offline MarcelvdG  Netherlands
diyAudio Member
 
Join Date: Mar 2003
Location: Haarlem, the Netherlands
I use it whenever I want a closed-form expression for a transfer function and can't think of a smarter way to solve the network equations.
  Reply With Quote
Old 19th November 2017, 09:16 PM   #3
werewolf is offline werewolf  United States
diyAudio Member
 
Join Date: Feb 2004
Location: Austin, TX
I've been using it for over 30 years. Most recently, earlier this month I don't ever see a time when simulators replace its utility.
  Reply With Quote
Old 19th November 2017, 09:28 PM   #4
helitim is offline helitim  Canada
diyAudio Member
 
Join Date: Dec 2015
Location: Newfoundland
I've been re-learning long forgotten circuit theory/ analysis to aid in my understanding of audio design. Having been out of college for approximately 10 years, I've forgotten more than I remember! Plus, transposing is something that I am not all that great at! oh well, I guess I will keep up practice if it is a usable skill. The struggle is real! lol
  Reply With Quote
Old 19th November 2017, 11:42 PM   #5
helitim is offline helitim  Canada
diyAudio Member
 
Join Date: Dec 2015
Location: Newfoundland
Quote:
Originally Posted by werewolf View Post
I've been using it for over 30 years. Most recently, earlier this month I don't ever see a time when simulators replace its utility.
Maybe I misunderstood, but doesn't spice use the node voltage method to do its calculations?

I should have paid more attention in school! I wasn't focused on learning back then.

Last edited by helitim; 19th November 2017 at 11:43 PM. Reason: Spelling
  Reply With Quote
Old 20th November 2017, 05:43 AM   #6
MarcelvdG is offline MarcelvdG  Netherlands
diyAudio Member
 
Join Date: Mar 2003
Location: Haarlem, the Netherlands
Yes, it does.
  Reply With Quote
Old 20th November 2017, 07:05 AM   #7
werewolf is offline werewolf  United States
diyAudio Member
 
Join Date: Feb 2004
Location: Austin, TX
Quote:
Originally Posted by helitim View Post
Maybe I misunderstood, but doesn't spice use the node voltage method to do its calculations?

I should have paid more attention in school! I wasn't focused on learning back then.
Yes, it does ... for specific element values.

Does it offer nodal analysis for general (not numerically defined) components (R1, C3, L2, etc) yet? I've been out of the loop for a long time
  Reply With Quote
Old 20th November 2017, 11:56 AM   #8
helitim is offline helitim  Canada
diyAudio Member
 
Join Date: Dec 2015
Location: Newfoundland
Quote:
Originally Posted by werewolf View Post
Does it offer nodal analysis for general (not numerically defined) components (R1, C3, L2, etc) yet? I've been out of the loop for a long time
That is a question that I can't answer! I'm in the very early stages of learning LTSpice IV and PSUD. This whole learning adventure started when I started building a DIYA AB amplifier and realized how little I actually know!
  Reply With Quote
Old 20th November 2017, 12:18 PM   #9
Dave Zan is offline Dave Zan  Australia
diyAudio Member
 
Join Date: Nov 2010
Quote:
Originally Posted by helitim View Post
Maybe I misunderstood, but doesn't spice use the node...method to do its calculations?
To be a little pedantic, I believe Spice uses Modified nodal analysis.
Otherwise there are "divide by zero" type problems with sources, a potential source has zero impedance.
Like you I became curious about the theory behind the simulation, I would love to learn exactly how LTSpice handles this, if anyone knows more.

Best wishes
David
  Reply With Quote
Old 20th November 2017, 09:57 PM   #10
MarcelvdG is offline MarcelvdG  Netherlands
diyAudio Member
 
Join Date: Mar 2003
Location: Haarlem, the Netherlands
Quote:
Originally Posted by werewolf View Post
Yes, it does ... for specific element values.

Does it offer nodal analysis for general (not numerically defined) components (R1, C3, L2, etc) yet? I've been out of the loop for a long time
No simulator I know of can output a symbolic equation. Many can handle parameters and expressions with parameters, but you have to give all parameters a value before running the simulation and you get numerical values as output.

By the way, when Alan Turing wrote down his system design for the ACE stored-program digital computer in late 1945, circuit simulation was already one of the applications he had in mind!

Last edited by MarcelvdG; 20th November 2017 at 10:00 PM. Reason: Original text could lead to misunderstandings.
  Reply With Quote

Reply


node voltage analysisHide 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
Driving OPS from single-ended node without coupling capacitors MarosD Solid State 5 2nd November 2015 05:44 PM
LTSpice Model File node labels fasterbyelan Software Tools 5 4th February 2015 07:06 AM
place port on node? PeteMcK Multi-Way 4 28th April 2012 03:20 PM
Scaling voltage waveforms for distortion analysis okapi Everything Else 1 10th September 2008 02:58 AM
Which node(s) to worry about in CFB amplifiers pjacobi Solid State 11 15th February 2004 12:05 PM


New To Site? Need Help?

All times are GMT. The time now is 08:35 PM.


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