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Transistor 2

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This is an enhancement to the BJT current mirror which can be found in the circuit 'BJT Current Mirror / MOSFET Current Mirror'. A buffer (emitter follower) transistor Q3 is inserted between the collector of Q1 and the junction of the bases of Q1 and Q2. Less current is taken from the reference to drive the bases of Q1 and Q2 so the collector current of Q1 is closer in value to the reference. The output current delivered to the load now more accurately matches the reference current.

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Profile image for tetarfer

tetarfer

9 Circuits

Date Created

3 years, 1 month ago

Last Modified

3 years, 1 month ago

Tags

  • active load
  • bjt current sink
  • current source
  • bjt current source
  • bjt current mirror
  • current mirror
  • improved current mirror
  • base current compensation
  • bjt bias current generator
  • bjt improved current mirror

Circuit Copied From

BJT Current Mirror With Base Drive Buffer

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