can an electronic circuit have negative impedance?

2 Answers

  • Roger
    Lv 7
    8 years ago
    Favorite Answer

    A circuit can have a negative reactance, this would be a circuit with capacitive reactance. However a negative impedance implies that the sum of the resistance and reactance is negative. There are some devices that offer negative resistance in part of their operating range, in that area of operation they transfer power from the power supply to the circuit in question, this is how oscillators work. But there are no negative resistances/ resistors you can buy at part vendor. A negative resistance would violate the laws of thermodynamics.

  • 8 years ago

    Well, a negative impedance could also be called a positive electron flow, so sure. Any amplification circuit could be said to have negative impedance. But I don't know why you would want to. It's kind of like telling someone to go a mile down the road and take a negative right.

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