Questions tagged [parameters]

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How can I plot "Vdsat" VS "Vgs" in Cadence Virtuoso?

How can I plot "Vdsat" VS "Vgs" in Cadence Virtuoso? I can place a voltage supply at the Vgs (gate-source voltage), then I give to its value a variable. After that, I can define ...
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1 answer
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How can I find tsmc65N (or 65nm feature size) NMOS parameters definition in Cadence Virtuoso?

How can I find tsmc65N (or 65nm feature size) NMOS parameters definition in Cadence Virtuoso? They are all abbreviated and there is not any guide there. For example, I want to know the value of "...
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Can the secondary voltage of this old transformer be derived?

Images are of an unknown "4808" PCB-mounted transformer. It has an open 240 VAC primary. Data: EI48 core, around 12-15VA. The center-tapped secondary is 15Ω-CT-15Ω and 1.6H-CT-1.6H according ...
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LTspice - move the cursor to a particular run in the plot

After running a stepped parameter simulation, the cursor can be moved between different runs using the up and down arrows. This is impractical for a large number of runs. Is there a way to jump to e.g....
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Altium schematic parameters position

I want to achieve the capacitor symbol like this(sch library file): But when I turn on an autoposiotion function for parameters - which I also need - then parameters lock in position like this (they ...
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Why can S21 be simply calculated as 2Vout/Vgen?

For one of the four S-parameters - the S21 - why is that S21 can be translated as 2Vout/Vgen? Is there a simple explanation for it?
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1 answer
154 views

LTspice parameter sweep and sampling

Setup I am trying to run a parameter sweep in LTspice in order to generate STDP curves for a memristor. I'm doing this by sweeping a time-delta parameter dT between ...
1 vote
2 answers
720 views

What is the physical significance of beta and alpha in BJT?

I have read in the book that beta is the ratio of collector current to the base current in common emitter configuration and alpha is the ratio of collector current to emitter current to common base ...
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554 views

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 ...
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84 views

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 ...
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Transmission Parameters for a 2nd order butterworth bandpass filter

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_{...
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Magic number in TI white paper "Estimating MOSFET Parameters from the Data Sheet"

I'm reading through a white paper titled Estimating MOSFET Parameters from the Data Sheet (PDF), published by Texas Instruments in 2002, and in section "A3. Gate threshold and Miller plateau ...
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