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.

Voltage regulator
Voltage regulator
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 27th August 2003, 12:01 PM   #1
annex666 is offline annex666  England
diyAudio Member
annex666's Avatar
Join Date: Jul 2002
Location: England
Question Voltage regulator

I have a quick question about voltage regulators.

From what I have read most seem to be based around a differential system referencing the output voltage and a reverse-biased zener diode.

I was wondering if there are any commercial designs that use a precision voltage reference and a voltage follower (to accomodate the output current)?

I designed and simulated a discrete version of this idea based around zeners that are driven from zener referenced current sources cascaded in stages (I'm almost sure cascaded is not the correct terminology in circuit terms, but in logical terms it is correct). The circuit I tested had a very good SNR from what I remember.

To elaborate, a current source based on a zener reference voltage is used to source current for another zener - the voltage across which is used to reference the next current source and so on. Due to the steep I/V slope characteristics of the zener diode input voltage noise is reduced in each stage.

Does anyone know if commercial designs use this idea?
Are there many downsides?
...if it ain't broke don't fix it - make it BETTER!
  Reply With Quote
Old 27th August 2003, 02:50 PM   #2
jan.didden is offline jan.didden  Europe
diyAudio Member
jan.didden's Avatar
Join Date: May 2002
Location: The great city of Turnhout, BE
I have seen many of those designs on this forum - look for something like "capacitance multiplier".
The significant difference between your circuit proposal and a regulator is that yours doesn't use overall feedback to regulate the output voltage - it really doesn't regulate in the normal sense of the term. It basically is a DC amplifier, amplifying the ref voltage, where-ever that comes from. The outp[ut will vary much more from varying the load then with a regulator. On the other hand, some have reported sonic advantages from the absence of overall feedback. The proof of the pudding is the eating.

Jan Didden
  Reply With Quote


Voltage regulatorHide 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
voltage regulator Sebastiaan Power Supplies 2 12th June 2005 07:51 PM
Voltage Regulator ! jleaman Power Supplies 11 13th May 2005 12:00 AM
Voltage Regulator zoro72 Everything Else 0 26th April 2004 05:30 PM
Voltage regulator help! kasra Solid State 7 23rd November 2002 02:07 PM
What voltage regulator to use? Thomas Everything Else 2 28th September 2001 02:53 PM

New To Site? Need Help?

All times are GMT. The time now is 04:13 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio