08-05-2011 04:20 AM
Problem with Pole zero analysis using multisim
When I tried to find input impedance function's pole zero of a parallel LC network using Multisim
pole zero analysis, I get following message
| | doAnalyses: matrix is singular
| | pz simulation(s) aborted "
The circuit as well as log file attached.
How to correctly perform pole zero analysis?
Solved! Go to Solution.
08-05-2011 09:17 AM
Part of performing a pole/zero analysing is linearizing the circuit using a DC operating point analysis, in which an inductor acts as a short circuit. The problem is that in your circuit, the inductor is in parallel with a voltage source internal to the function generator.
Use a small resistor (1mOhm will do in your case) in series with the function generator output to break the short circuit loop.
08-10-2012 05:55 AM
thanks for your earlier reply to my question on pole zero analysis
one more problem on pole zero analysis ;
i tried to do pole zero analysis for circuit(shown in attached file where C1=1/6F(167mF) C2=5/18F(278mF) for which
for which zeros are at +/-3j ,+/-1j
poles at 0 ,+/-2j as per theory:
But multisim gives different values (shown in attached file)
what is the problem?
thanks & regards