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20 1. A Short Introduction<br />

Verifying Approximation Results<br />

The quality of the approximation can be determined by performing a numerical comparison between<br />

the simplified transfer function and the data imported from the numerical simulator (PSpice in this<br />

case). Therefore, we need to extract the design point from the DAEObject first using the command<br />

GetDesignPoint (Section 3.6.12). The design point specifies those numerical values for each one of<br />

the circuit elements that were given in the netlist.<br />

In[20]:= designpoint = GetDesignPoint[staAC741]<br />

Out[20]=<br />

Rpi$Q1 756000., Ro$Q1 2.19 10 7 , Cbc$Q1 3.7 10 13 ,<br />

Cbe$Q1 1.47 10 12 , gm$Q1 0.00029, Cbx$Q1 0.,<br />

Rpi$Q2 753000., Ro$Q2 2.18 10 7 , Cbc$Q2 3.7 10 13 ,<br />

Cbe$Q2 1.47 10 12 , gm$Q2 0.000291, Cbx$Q2 0.,<br />

Rpi$Q3 219000., Ro$Q3 8.46 10 6 , Cbc$Q3 3.85 10 13 ,<br />

Cbe$Q3 1.42 10 12 , gm$Q3 0.000287, Cbx$Q3 0.,<br />

Rpi$Q4 217000., Ro$Q4 8.4 10 6 , Cbc$Q4 3.87 10 13 ,<br />

Cbe$Q4 1.42 10 12 , gm$Q4 0.000288, Cbx$Q4 0.,<br />

Rpi$Q5 705000., Ro$Q5 2.04 10 7 , Cbc$Q5 8.28 10 13 ,<br />

Cbe$Q5 1.47 10 12 , gm$Q5 0.000285, Cbx$Q5 0.,<br />

Rpi$Q6 705000., Ro$Q6 2.04 10 7 , Cbc$Q6 7.93 10 13 ,<br />

Cbe$Q6 1.47 10 12 , gm$Q6 0.000285, Cbx$Q6 0.,<br />

Rpi$Q7 533000., Ro$Q7 1.55 10 7 , Cbc$Q7 2.97 10 13 ,<br />

Cbe$Q7 1.48 10 12 , gm$Q7 0.000447, Cbx$Q7 0.,<br />

Rpi$Q8 89500., Ro$Q8 3.46 10 6 , Cbc$Q8 1. 10 12 ,<br />

Cbe$Q8 1.45 10 12 , gm$Q8 0.000559, Cbx$Q8 0., R1 1000.,<br />

R2 1000., R3 50000., Rpi$Q9 89500., Ro$Q9 3.46 10 6 ,<br />

Cbc$Q9 3.62 10 13 , Cbe$Q9 1.45 10 12 , gm$Q9 0.000732,<br />

Cbx$Q9 0., Rpi$Q10 293000., Ro$Q10 8.51 10 6 ,<br />

Cbc$Q10 3.81 10 13 , Cbe$Q10 1.5 10 12 , gm$Q10 0.000742,<br />

Cbx$Q10 0., Rpi$Q11 7260., 44, Ro$Q17 240000.,<br />

Cbc$Q17 3.82 10 13 , Cbe$Q17 1.6 10 12 , gm$Q17 0.0263,<br />

Cbx$Q17 0., R6 27., R7 22., R8 100., R9 50000.,<br />

R10 50000., R11 50000., R12 300., Rpi$Q18 368000.,<br />

Ro$Q18 1.07 10 7 , Cbc$Q18 1. 10 12 , Cbe$Q18 1.49 10 12 ,<br />

gm$Q18 0.000543, Cbx$Q18 0., Rpi$Q19 25500.,<br />

Ro$Q19 740000., Cbc$Q19 8.26 10 13 , Cbe$Q19 1.57 10 12 ,<br />

gm$Q19 0.00787, Cbx$Q19 0., Rpi$Q20 5810.,<br />

Ro$Q20 225000., Cbc$Q20 1.11 10 12 , Cbe$Q20 4.48 10 12 ,<br />

gm$Q20 0.0111, Cbx$Q20 0., Rpi$Q21 3.34 10 13 ,<br />

Ro$Q21 6.24 10 11 , Cbc$Q21 3.66 10 13 , Cbe$Q21 1. 10 12 ,<br />

gm$Q21 3.43 10 13 , Cbx$Q21 0., Rpi$Q24 1.86 10 14 ,<br />

Ro$Q24 9.28 10 11 , Cbc$Q24 1. 10 12 , Cbe$Q24 1. 10 12 ,<br />

gm$Q24 3.77 10 18 , Cbx$Q24 0., Rpi$Q23 1.86 10 14 ,<br />

Ro$Q23 9.82 10 11 , Cbc$Q23 7.13 10 13 , Cbe$Q23 1. 10 12 ,<br />

gm$Q23 6.91 10 14 , Cbx$Q23 0., C1 3. 10 11 ,<br />

Rpi$Q222 7550., Ro$Q222 292000., Cbc$Q222 3.75 10 13 ,<br />

Cbe$Q222 1.52 10 12 , gm$Q222 0.00845, Cbx$Q222 0.,<br />

Rpi$Q221 5. 10 13 , Ro$Q221 7.67 10 11 , Cbc$Q221 3.75 10 13 ,<br />

Cbe$Q221 3.88 10 13 , gm$Q221 2.68 10 14 ,<br />

Cbx$Q221 0., R13 1000., VID 1., Simulator PSpice

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