What happens when you cross a Tringlotron with a Regulator-Chip Amplifier? - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 22nd October 2010, 12:59 PM   #1
Elvee is offline Elvee  Belgium
diyAudio Member
 
Elvee's Avatar
 
Join Date: Sep 2006
Default What happens when you cross a Tringlotron with a Regulator-Chip Amplifier?

Answer:

The result is a Chtringlunator

The Tringlotron
The Regulator-Chip Amp

And their progeny: the Chtringlunator is a headphone amplifier, capable of delivering 500mW into 32ohm at low distortion, and without overall negative feedback.
The minimum power supply voltage required to obtain this power is 21V.

Pics will follow
Attached Images
File Type: gif Chtringlunator.GIF (40.3 KB, 722 views)
  Reply With Quote
Old 23rd October 2010, 12:25 AM   #2
Bigun is offline Bigun  Canada
diyAudio Member
 
Bigun's Avatar
 
Join Date: Jan 2009
Blog Entries: 2
Hi Elvee,

You must be powered by Oktoberfest beer, I can't keep up with all of your inventions
__________________
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
  Reply With Quote
Old 23rd October 2010, 01:29 AM   #3
Banned
 
Join Date: Jan 2008
Blog Entries: 2
Cool Elvee. You need to get out more.

w
  Reply With Quote
Old 23rd October 2010, 10:52 AM   #4
Elvee is offline Elvee  Belgium
diyAudio Member
 
Elvee's Avatar
 
Join Date: Sep 2006
I run on pure, high quality biofuel, and there is not one square centimeter of carpet left in my home.

Here are the pictures of the prototype and the test set-up.
Measuring the THD proved quite challenging, not only because it is very low, and the circuit is a bit noisy, but also because the output is floating.

I had to use a 1:1 transformer, which served to subtract the output from the input.
With 12Vpp input, the residue caused by phase shifts, imperfections in the amplifier and transformer was 70mVpp. That's 44.5dB down.

The residue was measured on a spectrum analyzer (I didn't include a screenshot of the output waveform, it is just a boring sinewave).

The dominant harmonic is the third (cursor), at -53.3dB.
The global THD is about -51dB. Taking the subtractor into account, this put the actual THD at -95dB or 0.0018% (18ppm).
This is quite surprising, because the sim predicted a much higher figure of 0.0080%, and moreover, this figure also includes the distortion of the test transformer, which is subjected to the full amplitude of the signal.

This means the actual figure is even lower, particularly for the odd components.
The Tringlotron topology is basically asymmetric, and tends to produce more even harmonics.
The transformer is a very high quality one, salvaged from a professional Philips equipement, but it certainly contributes significantly to the THD figure.
The true distortion of the Chtringlunator is probably under 10ppm, and this is at the max power of 500mW.
At more reasonable levels, it is even lower.
Attached Images
File Type: gif ChtriglunatorSetUp.gif (7.3 KB, 666 views)
File Type: jpg Chtriglunator1.JPG (184.7 KB, 633 views)
File Type: jpg Chtriglunator2.JPG (176.7 KB, 591 views)
File Type: jpg TestSetUp.JPG (219.2 KB, 552 views)
File Type: jpg Spectrum.JPG (330.1 KB, 171 views)
  Reply With Quote
Old 25th October 2010, 12:13 PM   #5
Elvee is offline Elvee  Belgium
diyAudio Member
 
Elvee's Avatar
 
Join Date: Sep 2006
Some further details:

Unlike the class B regulator chip amp, this one has no slew-rate issues: it can provide its full power on the whole audio spectrum, and well beyond.

And though its performances are no better than a discrete tringlotron, they are much less dependent on accurate matching and thermal tracking of the output devices.
  Reply With Quote
Old 25th October 2010, 03:30 PM   #6
Bigun is offline Bigun  Canada
diyAudio Member
 
Bigun's Avatar
 
Join Date: Jan 2009
Blog Entries: 2
The golden question - how does it sound ?
__________________
"The test of the machine is the satisfaction it gives you. There isn't any other test. If the machine produces tranquility it's right. If it disturbs you it's wrong until either the machine or your mind is changed." Robert M Pirsig.
  Reply With Quote
Old 26th October 2010, 01:09 PM   #7
Elvee is offline Elvee  Belgium
diyAudio Member
 
Elvee's Avatar
 
Join Date: Sep 2006
Quote:
Originally Posted by Bigun View Post
The golden question - how does it sound ?
I'm afraid I'm the least qualified individual to answer that question, because,
a) I have tin ears,
b) I am the creator of the circuit, and therefore I cannot be objective on the subject. It's like asking a man if he is a good lover or a good driver
I will just venture so far as to say it sounds normal...
For the rest, you'll have to build one for yourself.
  Reply With Quote
Old 29th October 2010, 01:40 PM   #8
jkeny is offline jkeny  Ireland
Banned
 
Join Date: Feb 2007
Location: Dublin
How easily can this be changed to an I-V converter with zero impedance input - I'm thinking of something to use as output stage for a Sabre DAC?

I see John Broskie has done his own config - a Triadtron & used it as I-V
  Reply With Quote
Old 29th October 2010, 06:18 PM   #9
Elvee is offline Elvee  Belgium
diyAudio Member
 
Elvee's Avatar
 
Join Date: Sep 2006
This topology cannot be used as such for that purpose.

But the tringlotron principles can be applied to an I/V converter.

Here is an example: it is not very elaborate, and the performances are modest, but it shows the way.
With some minor modifications, the transistors could be replaced by voltage regulators.
Attached Images
File Type: gif I_Vc.gif (42.7 KB, 236 views)
  Reply With Quote
Old 29th October 2010, 11:36 PM   #10
Zigis is offline Zigis  Latvia
diyAudio Member
 
Join Date: May 2005
Location: Riga, Latvia
You say headphone amp? See this:
24V Aikido Line Stage and Headphone Amplifier

I use Broskie's LM317 output stage with different tube stage, and powered tube heater with lower LM317 in the same time.
I can't say it sound "normal", it sound really good!
  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
Just for fun: The Regulator-Chip amplifier Elvee Chip Amps 4 21st October 2010 03:19 PM
The Tringlinator: a MOS-based Tringlotron amplifier Elvee Headphone Systems 29 9th October 2010 11:53 AM
Placing regulator chip close to amplifier terranigma Power Supplies 4 8th June 2010 09:47 AM
Can Someone Help Me Find A Cross Chip? Zedguy Parts 2 22nd April 2008 01:21 AM
APEX Chip Cross-Ref Guide speaker Chip Amps 0 4th April 2004 04:02 AM


New To Site? Need Help?

All times are GMT. The time now is 06:25 AM.


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