1. Z and K for filter, 2. simple transient analysis

Discussion in 'Electronics Resources' started by johnyjj2, Dec 15, 2009.

  1. johnyjj2

    Thread Starter New Member

    Dec 11, 2009
    7
    0
    Hello!

    I'd like to do two things in LTSpice IV (it is very similar to Orcad Pspice).

    First thing is to create graphs for inductance Z and gain K = Uout/Uin for some filters. I created the simplest filter (first picture: http://images42.fotosik.pl/150/d4ee161326b5f69d.png) and I could draw one graph (K), however I don't know how to create the other one (Z). I created more difficult filter (second picture: http://images41.fotosik.pl/234/457f341d1eb77a4d.png) and it surprised me because I cannot create even that simpler graph. I can click on voltage source and C1 but I cannot click C2, L1 or output.

    The second question is about more complex circuit with capacitors, coils and resistors. I'd like to measure voltage on every node. I tried using transient but the graph doesn't say to me what the value of voltage is. It creates graph with minimal and maximal value, many oscillations. Circuit: http://images49.fotosik.pl/238/2c0c6d056ffe1753.png . Graph: http://images47.fotosik.pl/238/f7834df92b07aec9.png . But how to check the value of current in the node? I remember that I had to do similar thing long time ago in Electronics Workbench, it didn't create any graphs, it simply gave me the values of voltage at nodes.

    Greetings!
     
  2. johnyjj2

    Thread Starter New Member

    Dec 11, 2009
    7
    0
    Can anybody answer my question, please?
    Regards!
     
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