Recent content by Electrical_kid

  1. E

    Common Emitter with emitter resistance small signal model

    Baluncore, I think the reason I was having trouble is because the answer they provided was missing the plus sign, a previous professor of mine provided me a pdf file explaining how they get Rin and it definitely shows that it should be Rin = RB || ( rpi + RE(beta +1)).
  2. E

    Common Emitter with emitter resistance small signal model

    Should Rin be Rin = RB || (rpi + RE*(beta+1)) ?
  3. E

    Common Emitter with emitter resistance small signal model

    Its homework, do you think there is a typo in the Rin given? Or is the emitter resistance in the wrong place?
  4. E

    Common Emitter with emitter resistance small signal model

    [Mentor's Note: Thread Moved from EE Forum] This link has the picture, for some reason it wasnt showing in this post. http://i.imgur.com/TYlb32t.jpg Here is my problem, I am supposed to use this circuit and solve for Av and Rin. My problem is that I have solved for Av but I can't solve for Rin...