J-JLH or PLH-J ? - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 19th July 2011, 11:11 PM   #11
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
You can transformer couple the input so as to use a split supply with DC
coupled output - this way you can reject the supply rail noise, something
you don't have to do when ground is the lower rail.

Alternatively you would put one or two front end transistors to level-shift
the input down to the Gate of the driver transistor - but then you have the
original JLH circuit with three stages instead of two.

If you had a very very quiet negative rail, you could make it work as is.

  Reply With Quote
Old 28th July 2011, 01:37 PM   #12
FYC is offline FYC  Hong Kong
diyAudio Member
 
Join Date: Jan 2001
Location: Hong Kong
Quote:
Originally Posted by tmblack View Post
How would the circuit change if any with the input J-FET ?
Here is the circuit attached.
Attached Images
File Type: jpg J_PLH.jpg (131.9 KB, 203 views)
  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
Plh Nelson Pass Pass Labs 192 22nd April 2013 07:57 PM
PLH vs ??? MikeW Pass Labs 18 8th November 2005 02:06 AM


New To Site? Need Help?

All times are GMT. The time now is 11:22 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