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Homework Help: Simple Y-parameter (admittance-parameter) matrix problem?

  1. Jun 24, 2013 #1
    simple Y-parameter (admittance-parameter) matrix problem??

    1. The problem statement, all variables and given/known data

    2. Relevant equations
    general form of Y-parameter is
    [I1]=[Y11 Y12][V1]
    [I2]=[Y21 Y22][V2]

    3. The attempt at a solution
    i think i was confused what exactly this problem asked for. the general equation for I1 for instance you would add the variables, so I1=Y11(V1)+Y12(V2). to calculate Y11 also, you would add a 1V source on the left side, and short-circuit the right side. so i'm pretty sure it would be Y11=([itex]\frac{1}{Ya}[/itex]+[itex]\frac{1}{Yb}[/itex])s. since the only signs i saw in these equations were '+' i put the 1st choice (A) as my answer.
  2. jcsd
  3. Jun 24, 2013 #2

    rude man

    User Avatar
    Homework Helper
    Gold Member

    A is the answer.

    The idea is that, for two networks, the input currents i1A and i11B are added and so are the output currents i2A and i2B . This implies that the individual admittance parameters yij for A and B are also added.
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