Common emitter stage driving low hfe output stage - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki 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
Thread Tools Search this Thread
Old 20th December 2012, 04:55 PM   #1
diyAudio Member
Join Date: Feb 2012
Default Common emitter stage driving low hfe output stage

Say your output stage has a very high IQ for class A design (lets say 1 amp) but also has a low hfe of 80 (for example 2SC5200 STMicroelectronics | 497-10863-5-ND | DigiKey)

How do you go about driving this output stage without significant voltage drop (compared to an unloaded common emitter stage)?
  Reply With Quote
Old 20th December 2012, 05:05 PM   #2
Bigun is offline Bigun  Canada
diyAudio Member
Bigun's Avatar
Join Date: Jan 2009
Location: Waterloo, ON or Herefordshire
Blog Entries: 2
The driver should have low output impedance and ability to source current. Another emitter follower is the popular solution. a CFP can provide some advantages.
"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


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
Emitter resistor at output stage transistor. smithomo Solid State 88 7th October 2014 10:50 AM
What is the importance of IQ in a common emitter stage? Fusion916 Solid State 2 1st December 2012 04:13 AM
~100khz sinudodial signal superimposed on the output of a common emitter stage Fusion916 Solid State 9 20th October 2012 01:11 AM
Class (A)B output stage: why 2 emitter resistors, why not 1? deleveld Solid State 23 13th December 2006 06:10 PM

New To Site? Need Help?

All times are GMT. The time now is 11:47 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2