Input and Output Impedance

Discussion in 'Homework Help' started by tahir4awan, Dec 5, 2010.

  1. tahir4awan

    Thread Starter New Member

    Dec 5, 2010
    I want to know about input and output impedance of amplifiers with examples
  2. tyblu


    Nov 29, 2010
    I have a single transistor amp, the BFR92A in SOT23 package, in CE setup, with 10uH chokes used to bias attached 5mm from base (0.8V) and collector (9.8V) with 5mm leads, with input reflection coefficient of 0.331374 @ -169.024deg and output reflection coefficient of 0.570281 @ -24.605deg, all at 1GHz. Find the input and output impedance in a 50-ohm system, and stub lengths to match the input and output using two double-stub networks (1/8-wavelength in between stubs). DC, amp configuration, signal frequency, and package details are not required for the solution, just the reflection coefficients.
    Last edited: Dec 5, 2010