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.

Discrete amp based on LM38-- family internals?
Discrete amp based on LM38-- family internals?
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 15th November 2005, 11:45 PM   #1
tiltedhalo is offline tiltedhalo  United States
diyAudio Member
Join Date: Sep 2005
Location: Melbourne Florida
Default Discrete amp based on LM38-- family internals?

I just recently built my first gain clone, a single lm3875 then a bridged parallel lm3886's, great sound, overall.... I was woundering if anyone has ever thought about building a discrete amp based on the internals of the chips?? most all of the chip looks like current drive up to the output drivers, and its quasi. I understand a lot of the overall sound quality is due to the close coupleing and common substrate, but you could duplicate most in a discrete design. Any thoughts?
  Reply With Quote
Old 16th November 2005, 01:06 AM   #2
amplifierguru is offline amplifierguru
Account Disabled
Join Date: Aug 2004
Location: Earth
Hi tilted halo,

In discrete design we have tools available to us that enable quite simple designs to equal or better such chip amp designs in performance. Bootstrapping for example, with quite large C's to achieve high gain and linearity together. For example -


There are of course advantages in monolithic design but such can usually be accessed by an op-amp front end with discrete output stage, minimising thermal distortion effects.

  Reply With Quote


Discrete amp based on LM38-- family internals?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Op amp based preamp with discrete output hags Solid State 11 17th September 2007 09:24 AM
New SI T-Amp, Different internals schmalex Class D 5 10th March 2007 05:13 AM
tda2007A internals ? ash_dac Chip Amps 3 9th July 2006 07:02 AM
question on amp internals duece212 Car Audio 6 9th March 2006 06:48 AM
Question about Discrete Based(Transistor) Amps? Tom D Solid State 9 1st September 2003 04:57 PM

New To Site? Need Help?

All times are GMT. The time now is 01:21 AM.

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