# Questions tagged [parameters]

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### How to simulate a short on LTspice

I'm trying to simulate two scenarios in LTspice. One is when things are ok. The second is when a short happens. As you can imagine I'm a beginner with LTspice. At first I was just putting a resistor ...
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### Where are document options in altium 2020

I switched to altium 2020 and I can't find the document options dialog that was previously available in "design / document options". I want to set parameters like in the screenshot (altium ...
39 views

### How to calculate $Z_1, Z_2$ and $Z_3$ in two-port circuit?

I should calculate $Z_1, Z_2$ and $Z_2$, where $a_{11} = 1.8, a_{12} = 2kΩ, a_{21} = 1*10^{-3}S$ and $a_{22} = 5/3$? Also, all impedances are resistive, i.e. resistors. I have no idea how to ...
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### What is the (typical) value of SPICE parameter ISS for a (vertical) npn transistor?

SPICE gives a default value for the (collector) substrate leakage saturation current ISS. The default is ISS=0 but I would like to know the real value for an integrated vertical npn transistor. The ...
I am trying to find the transmission parameters (ABCD parameters) for the above circuit. $$a_{11}= \frac{V_1}{V_2} |I_2=0$$ $$a_{12}= -\frac{V_1}{I_2} |V_2=0$$ $$a_{21}= \frac{I_1}{V_2} |I_2=0$$ a_{...