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.

The Fully Differential Phase Inverter
The Fully Differential Phase Inverter
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 28th June 2013, 08:06 PM   #1
mos57 is offline mos57  Italy
diyAudio Member
 
mos57's Avatar
 
Join Date: Apr 2006
Location: Catanzaro - Italy
Default The Fully Differential Phase Inverter

Hi at All,

as I promised in another thread one year ago, i will present my work on a new type of phase splitter, or better to say, a new entire class of phase splitters with a common architecture as in the below attachment.

All circuits are found on differential amplifiers sub-unity.

Due the more type , then I publish the most interesting variant.

All those circuits, i think, make a good job for unbalance to balanced signal converters and they are the natural inverter circuit for simmetrical topologies as Circlotron amplifiers and Brigde Son of Zen type.

I hope this work can help People to build better amplifiers.

All comments are welcome.

Francesco Corrado
Attached Images
File Type: jpg Fully_Differential_Phase_Inverter_FIG_1H.jpg (32.2 KB, 570 views)
  Reply With Quote
Old 28th June 2013, 08:22 PM   #2
mos57 is offline mos57  Italy
diyAudio Member
 
mos57's Avatar
 
Join Date: Apr 2006
Location: Catanzaro - Italy
This is the simplest version and the base
Attached Images
File Type: jpg Fully_Differential_Phase_Inverter_FIG_11H.jpg (84.4 KB, 557 views)
  Reply With Quote
Old 28th June 2013, 08:45 PM   #3
mos57 is offline mos57  Italy
diyAudio Member
 
mos57's Avatar
 
Join Date: Apr 2006
Location: Catanzaro - Italy
A more accurate circuit with 2 outputs
Attached Images
File Type: jpg Fully_Differential_Phase_Inverter_FIG_2H.jpg (110.6 KB, 542 views)
  Reply With Quote
Old 28th June 2013, 08:47 PM   #4
mos57 is offline mos57  Italy
diyAudio Member
 
mos57's Avatar
 
Join Date: Apr 2006
Location: Catanzaro - Italy
And for the first time, with FOUR outputs!
Attached Images
File Type: jpg Fully_Differential_Phase_Inverter_FIG_3H.jpg (116.4 KB, 506 views)
  Reply With Quote
Old 28th June 2013, 08:53 PM   #5
mos57 is offline mos57  Italy
diyAudio Member
 
mos57's Avatar
 
Join Date: Apr 2006
Location: Catanzaro - Italy
While these configurations are valid also for tube circuits
Attached Images
File Type: jpg Fully_Differential_Phase_Inverter_FIG_4H.jpg (108.1 KB, 487 views)
File Type: jpg Fully_Differential_Phase_Inverter_FIG_5H.jpg (116.9 KB, 160 views)
  Reply With Quote
Old 28th June 2013, 09:26 PM   #6
mos57 is offline mos57  Italy
diyAudio Member
 
mos57's Avatar
 
Join Date: Apr 2006
Location: Catanzaro - Italy
This is instead a real example of application of this phase splitter in a special (at least for me) circlotron amplifier.

Best regards, Francesco
Attached Images
File Type: jpg MY_SISTER_SIT_Super_Circlotron_2SK180.JPG (63.8 KB, 244 views)
  Reply With Quote
Old 29th June 2013, 04:53 PM   #7
mos57 is offline mos57  Italy
diyAudio Member
 
mos57's Avatar
 
Join Date: Apr 2006
Location: Catanzaro - Italy
Today I updated the page of my website describing the operation of the circuit and inserting additional schematics.

New Phase Splitter/Inverter AMPLIMOS one stage amplifiers
  Reply With Quote
Old 10th July 2013, 12:22 PM   #8
dirkwright is offline dirkwright  United States
diyAudio Member
 
dirkwright's Avatar
 
Join Date: May 2011
Location: Virginia
It could be useful as a balanced line driver.
  Reply With Quote
Old 10th July 2013, 06:45 PM   #9
mos57 is offline mos57  Italy
diyAudio Member
 
mos57's Avatar
 
Join Date: Apr 2006
Location: Catanzaro - Italy
Yes, It could be useful as a balanced line driver, but not only.

As phase splitter at first sight, the circuits may sound complicated, because it uses an excess of transistors (6 or 8), but in reality if you judge it for what it actually does, at the end it is not unnecessarily complicated.

In fact it not only divides and routes the input signal but it also amplifies this last with much voltage gain.

Look to the scheme: the same circuit with the addition of a volume potentiometer could be a great line preamplifier with balanced output. As shown in annex scheme Circlotron, this circuit,inserted into an amp, it simultaneously makes function that would otherwise require three separate stages:

1) Input stage
2) Phase splitter stage
3) VAS stage.

With this phase inverter, to complete an amplifier would be need only a pair of power transistors in EF stage and nothing else.

In the future I'm planning to make up kits of high quality using matched pairs already available (That 300, 320).
  Reply With Quote
Old 10th July 2013, 07:52 PM   #10
Struth is offline Struth  Canada
Banned
 
Join Date: Aug 2012
Location: books at londonpower.com
Hi Guys

There is nothing new here.

Being able to use both outputs of a diff amp helps to keep the diff balanced. In this age of super-power amps that are internally wired as bridged or balanced-path amplifiers, a true balanced amp designed as dependent signal paths is easily achieved with the above circuits. Built many in the past and they work fine.

Have fun
Kevin O'Connor
  Reply With Quote

Reply


The Fully Differential Phase InverterHide 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
Fully differential and pseudo-differential stages rtarbell Solid State 28 18th December 2018 04:08 PM
Is a Differential Pair (CCS tail) phase inverter suitable for a Class AB outputstage? stigla Tubes / Valves 7 27th March 2007 01:57 PM


New To Site? Need Help?

All times are GMT. The time now is 08:28 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki