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Electronic Devices & CircuitsCurrent Mirrors

The principal advantage of a Widlar current source over a simple current mirror is its ability to generate?

  • AA relatively small output current without requiring an extremely large resistor
  • BAn AC voltage with zero DC bias
  • CInfinite current gain
  • DA digital clock signal
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Correct Answer: A. A relatively small output current without requiring an extremely large resistor
Explanation: Emitter degeneration in one mirror transistor allows the Widlar circuit to produce small bias currents using practical resistor values.
Reference: Standard analog electronics: Widlar current source
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