Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles Store Gallery Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

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 May 2011, 09:29 AM   #1
godfrey is offline godfrey  South Africa
diyAudio Member
 
Join Date: Nov 2009
Location: Cape Town
Default Allison(ish) driver/bias stage for Mosfets

Driving a Mosfet output stage with an Allison should allow greater output voltage swing since you're not losing Vgs on either side.

Adding a couple of transistors for current gain (Q1 and Q2 below) makes it a really easy load for the VAS too.

Looks good to me! What am I missing?
Attached Images
File Type: gif allison.GIF (4.7 KB, 111 views)
  Reply With Quote
Old 19th May 2011, 10:24 AM   #2
lineup is offline lineup  Sweden
diyAudio Member
 
lineup's Avatar
 
Join Date: Dec 2005
Location: the north
Looks good to me, too
__________________
lineup
  Reply With Quote
Old 20th May 2011, 12:39 AM   #3
danspy is offline danspy  Thailand
diyAudio Member
 
danspy's Avatar
 
Join Date: Jul 2007
He he,

Symmetrical Bootstrap and Darlington VAS, that,s nearly a jack of all trades.
__________________
知る者は言わず、いう者は知らず。
  Reply With Quote
Old 20th May 2011, 01:10 AM   #4
CBS240 is offline CBS240  United States
diyAudio Member
 
CBS240's Avatar
 
Join Date: Aug 2005
Location: K-town
I use a bi-polar bootstrap to power driver stage for source follower mosfets, it works great.
__________________
All the trouble I've ever been in started out as fun......
  Reply With Quote

Reply


Hide this!Advertise here!

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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
Parallel Output with Allison Bias? jkuetemann Solid State 7 29th April 2011 09:01 PM
Hybrid Aikido-ish gain stage Fuling Tubes / Valves 3 5th September 2006 09:49 AM
Mosfets and BIAS - sound design... Buhl Pass Labs 25 25th June 2005 06:06 PM
Bass(ish) driver for 1.5cf sealed box. sfdoddsy Multi-Way 7 8th September 2002 07:32 PM
spreading bias over more MOSFETS in aleph 5 Evaas Pass Labs 11 11th December 2001 07:05 AM


New To Site? Need Help?

All times are GMT. The time now is 12:08 PM.

Page generated in 0.09175 seconds (59.45% PHP - 40.55% MySQL) with 11 queries

Copyright ©1999-2012 diyAudio