current mirrors

Discussion in 'General Electronics Chat' started by bikerider60, Jan 6, 2010.

  1. bikerider60

    Thread Starter New Member

    Jan 6, 2010
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    Are current mirrors useful in discrete component designs?
     
  2. Jony130

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    Yes, but only with emitter degeneration resistor.
     
  3. bikerider60

    Thread Starter New Member

    Jan 6, 2010
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    Can someone post an example of a discrete component design with one or more current mirrors?
     
  4. Jony130

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  5. Wendy

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  6. SgtWookie

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    Jul 17, 2007
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    It helps accuracy quite a bit if there is good thermal coupling between the two transistors.

    It's really better to use a matched pair that are on the same substrate. It's difficult to get better thermal coupling than that.
     
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