Regulator Output Noise Voltage Spec - diyAudio
Go Back   Home > Forums > Design & Build > Parts
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

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 22nd January 2006, 11:50 PM   #1
TerryC is offline TerryC  United States
diyAudio Member
Join Date: Jun 2005
Location: WA-USA
Default Regulator Output Noise Voltage Spec

Can someone tell me why the output noise voltage specification is sometimes given as volts, and other times given as volts/Vout? Specifically I'm refering to the 78XX/79XX family of fixed voltage regulators. One manufacturer will spec it as 90uv, and another manufacturer will spec the regulator as 90uv/Vout. I can't believe that one regulator can be so much better/worse than the other.
  Reply With Quote
Old 23rd January 2006, 03:27 AM   #2
Stocker is offline Stocker  United States
diyAudio Member
Join Date: Dec 2003
Location: Austin
believe it. also, that may be one source that just left off the '/vout' part of the units...

search for (IIRC) "finessing voltage regulator noise" which is a nifty paper from Wenzel Assoc., who know about low noise stuff. Also search the forums here as this sort of topic has been discussed before.
Jesus loves you.
  Reply With Quote
Old 23rd January 2006, 04:46 AM   #3
diyAudio Member
Join Date: Dec 2005
Location: Kuala Lumpur
Variable regulators noise level increases as the voltage is increased, so the V/V spec makes sense, just multiply the output voltage by this figure.

Fixed regulators like a 7805 can just give a level in Volts.

Of course the V/V figure looks better at a glance
  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
FFT Noise Spectrum of the LM7812 three terminal fixed voltage regulator rjm Power Supplies 7 24th December 2009 03:59 PM
LT1083/84/85 linear regulator family: what's the output voltage range? jarthel Parts 6 26th July 2007 02:53 PM
voltage to look for on an amp remote lead? (A/D/S PQ8 spec) }"{ Solid State 0 3rd July 2006 08:51 PM
Ultra low noise JFET voltage regulator Kochkurov Maxim Digital Source 6 25th January 2004 11:33 AM

New To Site? Need Help?

All times are GMT. The time now is 06:42 PM.

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