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Network TheoryTwo-Port Networks

For a reciprocal two-port represented by z-parameters, which relation must hold?

  • Az11=z22
  • Bz12=z21
  • Cz11=z12
  • Dz21=0
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Correct Answer: B. z12=z21
Explanation: Reciprocity in the impedance-parameter representation requires the transfer impedances to be equal: z12=z21.
Reference: Standard network theory: reciprocal z-parameters
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