Semi-conductor p19 T-section attenuator

Discussion in 'General Electronics Chat' started by Yuf, Sep 11, 2014.

  1. Yuf

    Thread Starter New Member

    Sep 11, 2014
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    Hi guys,

    I'm new here and I have a mathematical problem. It's in page19 in semiconductor textbook. How are the expressions of R1 and R2 are derived from the circuit? Z = 50 ohms.
    View attachment 72885

    I appreciate all helps!
     
  2. Yuf

    Thread Starter New Member

    Sep 11, 2014
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    image.png
    Here is the diagram
     
  3. MikeML

    AAC Fanatic!

    Oct 2, 2009
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    The T attenuator in the examples is designed to have an input resistance of 50Ohms (and be driven from a 50Ohm source), an output resistance of 50Ohms (and be terminated by a 50Ohms load), while having the tabulated insertion loss.

    It is pure Kirchoff and algebra to solve the simultaneous equations in several unknowns to meet the requirements stated above.
     
  4. Yuf

    Thread Starter New Member

    Sep 11, 2014
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    Thanks man!
    I have found a link of the derivation, for others who are interested

    http://axotron.se/index_en.php?page=37
     
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