Regulated PSU?? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

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
Reply
 
Thread Tools Search this Thread
Old 12th July 2007, 05:52 PM   #1
diyAudio Member
 
Join Date: Mar 2004
Location: CT
Default Regulated PSU??

Hello,
This might be a somewhat abstract question, but, do you think it would be worthwhile to use a regulated supply for a simple buffer- hp filter? (Using an OPA2134 or LM4562)
  Reply With Quote
Old 12th July 2007, 06:19 PM   #2
diyAudio Member
 
Keruskerfuerst's Avatar
 
Join Date: May 2007
The power supply rejection of an audio circuit should be >100dB.
It is nessecary to use an regulated power supply.
__________________
Houston, we have a problem!
  Reply With Quote
Old 12th July 2007, 10:23 PM   #3
Gordy is offline Gordy  United Kingdom
diyAudio Member
 
Join Date: Nov 2006
"An amplifier receives a wave of electrons at it's input and produces a facsimile of that wave at it's output by modulating it's power supply according to it's transfer characteristic" ( Gordy, 2007)

So, yes, use a regulated supply.
Ideally use a supply with a low and constant output impedance over the audio band.
Read-up on pcb routing.
Use by-passing capacitors close to the chip power pins.
Remember that ground is also signal return (in conventional terms).
Remember that ground is also electron distribution (in unconventional terms).
  Reply With Quote
Old 12th July 2007, 10:30 PM   #4
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
To be honest it depends on the application and quality desired. A simple zener shunt reg might well be fine. In fact I've run simple op-amp circuits unregulated before without any real problems. 470uF per op-amp seemed fine.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 12th July 2007, 10:41 PM   #5
Gordy is offline Gordy  United Kingdom
diyAudio Member
 
Join Date: Nov 2006
Quote:
Originally posted by richie00boy
...quality desired.
If you want the best possible design, then regulate. It's not overly-expensive, and the information and parts are available. Unregulated is a compromise. It's as simple as that.
  Reply With Quote

Reply


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
Regulated or non-regulated SMPS longitude Class D 5 8th May 2007 03:02 PM
Need a little help with my first regulated PSU jarros Power Supplies 16 2nd May 2005 11:28 PM
Regulated PS Kit cantskienuf Chip Amps 7 24th September 2004 03:20 AM
Regulated PSU Help.. jleaman Analogue Source 9 26th July 2004 12:36 PM
Regulated or no regulated PSU? Higo Chip Amps 2 16th July 2003 04:38 PM


New To Site? Need Help?

All times are GMT. The time now is 03:56 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2