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

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johnyjj2

Joined Dec 11, 2009
7
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!
 
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