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

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

NE5534 buffer question
NE5534 buffer question
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 2nd November 2017, 12:06 PM   #1
ivanlukic is offline ivanlukic  Serbia
diyAudio Member
 
Join Date: Jul 2010
Location: Cacak
Default NE5534 buffer question

What value of compensation cap between pin 5 and 8 is enough so that NE5534 can be used as unity gain buffer for line level input signals?
  Reply With Quote
Old 2nd November 2017, 12:16 PM   #2
balerit is offline balerit  South Africa
diyAudio Member
 
balerit's Avatar
 
Join Date: Apr 2011
Location: South Africa
22pF?
  Reply With Quote
Old 2nd November 2017, 12:58 PM   #3
gpapag is offline gpapag  Greece
diyAudio Moderator
 
gpapag's Avatar
 
Join Date: Nov 2002
Location: Athens-Greece
NE5534 buffer question
Acc. to Douglas Self, ~22pF
Small Signal Audio Design: Douglas Self: 9780415709736: Amazon.com: Books

The NE5532/5534 opamp
The 5532 is a low-noise, low distortion bipolar dual opamp, with internal compensation for unity-gain stability. The 5534 is a single version internally compensated for gains down to three times, and an external compensation capacitor can be added for unity-gain stability; 22 pF is the usual value. The 5532 achieves unity-gain stability by having degeneration resistors in the emitter circuits of the input transistors, to reduce the open-loop gain, and this is why it is noisier than the 5534.


In 5532 TI datasheets, I can’t see emitter resistors though
http://www.ti.com/lit/ds/symlink/ne5532.pdf
http://www.ti.com/lit/ds/symlink/ne5534.pdf

George
__________________
["Second Law is a bitch." - SY] ["BTY my shop's large door is 14 feet wide so I can get my ego in each morning. Some evenings it can leave via the mail slot". -Ed Simon]
  Reply With Quote
Old 2nd November 2017, 01:24 PM   #4
Merlinb is offline Merlinb  United Kingdom
diyAudio Member
 
Merlinb's Avatar
 
Join Date: May 2006
Location: Lancashire
Yep, 22pF can be relied upon.
NE5534 compensation ?
  Reply With Quote

Reply


NE5534 buffer questionHide 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
To buffer or not to buffer that is the question. TUBESMAN Solid State 6 25th May 2016 04:24 AM
Buffer question? Dxvideo Tubes / Valves 27 20th November 2009 01:50 PM
B-1 buffer question dyohn Pass Labs 5 1st June 2009 07:18 PM
One more buffer question... Adam M. Chip Amps 18 20th April 2004 02:06 PM
PGA2310 buffer question till Solid State 5 20th September 2003 12:57 AM


New To Site? Need Help?

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


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki