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Q&A Complementary transistor pairs - what is the point ?

I understand that some applications require NPN-PNP pairs with identical electrical characteristics. But I would like to understand why.

2 answers  ·  posted 3y ago by coquelicot‭  ·  edited 8mo ago by Lorenzo Donati‭

#4: Post edited by user avatar Lorenzo Donati‭ · 2023-07-30T16:04:15Z (8 months ago)
Added appropriate tag. Removed misleading tag.
#3: Post edited by user avatar Lorenzo Donati‭ · 2023-07-30T12:37:57Z (8 months ago)
Added appropriate tag. Removed misleading tag.
#2: Post edited by user avatar Olin Lathrop‭ · 2020-08-15T19:56:56Z (over 3 years ago)
  • I understand that some applications require NPN-PNP pairs with identical electrical characteristics. But I would like to understand why.
  • More particularly, why does the Darlington or Sziklai configurations need complementary transistors?
  • For these configurations, when should I use complementary pairs and when could I use not complementary pairs ?
  • I understand that some applications require NPN-PNP pairs with identical electrical characteristics. But I would like to understand why.
#1: Initial revision by user avatar coquelicot‭ · 2020-08-15T19:01:00Z (over 3 years ago)
Complementary transistor pairs - what is the point ?
I understand that some applications require NPN-PNP pairs with identical electrical characteristics. But I would like to understand why. 

More particularly, why does the Darlington or Sziklai configurations need complementary transistors? 
For these configurations, when should I use complementary pairs and when could I use not complementary pairs ?