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

Solid State Talk all about solid state amplification.

Who was looking for NE5534 PSRR?
Who was looking for NE5534 PSRR?
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 8th December 2017, 10:17 AM   #11
traderbam is offline traderbam  Europe
diyAudio Member
 
traderbam's Avatar
 
Join Date: Jan 2002
Location: Earth
Quote:
Originally Posted by AndrewT View Post
it's a 5534, the 5532 is arranged a bit differently.
Indeed. I posted the wrong one. Here's the 5534. Pretty similar.
Attached Images
File Type: png NE5534 schematic.png (52.8 KB, 128 views)
__________________
Everything matters.
  Reply With Quote
Old 8th December 2017, 10:28 AM   #12
traderbam is offline traderbam  Europe
diyAudio Member
 
traderbam's Avatar
 
Join Date: Jan 2002
Location: Earth
Quote:
Originally Posted by AndrewT View Post
Jack,
was your test with, or without local decoupling?
And what sizes/locations?
Good point and, more generally, what was the test set-up? How was the psu voltage changed and what was used to measure the output to psu response? What was the output load and the input loading? Power supply voltage?
__________________
Everything matters.
  Reply With Quote
Old 8th December 2017, 12:12 PM   #13
jackinnj is offline jackinnj  United States
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Who was looking for NE5534 PSRR?
There was no local decoupling. Power was +/- 15V from Tektronix PS50150. No load.

The signal was 0 dBm from the Bode-100 with J2120A line injector. Chip was from TI.

Last edited by jackinnj; 8th December 2017 at 12:15 PM.
  Reply With Quote
Old 8th December 2017, 06:07 PM   #14
jackinnj is offline jackinnj  United States
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Who was looking for NE5534 PSRR?
A second sample doesn't test as well.
  Reply With Quote
Old 8th December 2017, 07:44 PM   #15
traderbam is offline traderbam  Europe
diyAudio Member
 
traderbam's Avatar
 
Join Date: Jan 2002
Location: Earth
I had my cat edit the original.
Looks like 12pF and 7pF are NFB paths. The 40pF looks more like a positive feed-forward.
So maybe the split NFB paths that lead to nodes that are loosely anchored to opposite power rails explains the closeness of the PSRR of each rail.
Attached Images
File Type: png NE5534 simpler.png (39.5 KB, 82 views)
__________________
Everything matters.

Last edited by traderbam; 8th December 2017 at 07:56 PM.
  Reply With Quote
Old 8th December 2017, 08:46 PM   #16
DPH is online now DPH  United States
diyAudio Member
 
Join Date: Dec 2008
Location: Portland, OR
Basically this looks like a loop-gain plot, no? Which makes total sense, tbh.
__________________
Happy DIYing, Daniel
  Reply With Quote
Old 8th December 2017, 10:18 PM   #17
abraxalito is offline abraxalito  United Kingdom
diyAudio Member
 
abraxalito's Avatar
 
Join Date: Sep 2007
Location: Hangzhou - Marco Polo's 'most beautiful city'. 700yrs is a long time though...
Send a message via Yahoo to abraxalito
I'd be interested to see how the plot changes with load, and also with displacement of the output from 0V.
__________________
I know you think you understand what you thought I said but I'm not sure you realize that what you heard is not what I meant - Alan Greenspan
  Reply With Quote

Reply


Who was looking for NE5534 PSRR?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
topology and PSRR theChris Tubes / Valves 4 9th December 2016 05:20 PM
PSRR Gost22 Tubes / Valves 2 19th July 2013 01:50 PM
Opamp PSRR lumanauw Solid State 10 12th March 2007 12:42 PM
PSRR and Crosstalk dgardner Solid State 4 20th June 2005 01:09 PM
How to predict PSRR ? Kilentra Solid State 6 9th July 2004 07:31 PM


New To Site? Need Help?

All times are GMT. The time now is 07:22 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki