Questions tagged [modeling]
This tag covers finding models for electrical and electronic components and circuits
283
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Modeling first-order dynamics of a switching converter
I have created a simple, first-order model of a switching regulator in steady state (it's basically a transformer with a loss element). Its only parameters are desired output voltage \$V_o\$ and ...
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LTspice, modeling line driver with propagation delay (LH0063)
Question
I'm trying to make a component model for the LH0063 single ended line driver in LTspice... The propagation delay is the dominant parameter for the frequency response but I'm having a hard ...
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Question regarding state-space modeling of a simple electrical circuit
Consider the circuit in the picture, where we have a voltage source (input) \$V(t)\$ and a capacitor \$C\$. The goal is to derive a state-space model of this circuit. The circuit satisfies the ...
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MOSFET model in LTspice with Miller Theorem
I want to make a MOSFET model in LTspice with a current source and the input capacities to see what happens in the switching process.
I'm not 100% sure but I think it works.
Below is the formula I ...
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Is the "\$\small o\$" in \$r_o\$ short for output or number 0?
You usually see ro in the small-signal models of BJTs or MOSFETs like this.
I'm curious if the "o" there is short for "output" or just the number zero? I think I saw people reading ...
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APD (Avalanche Photodiode) Active Quenching Circuit (AQC) Waveforms & Circuit Behavior
I am reading a paper tiled Avalanche photodiodes and quenching circuits for single-photon detection
The paper presents an Active Quenching Circuit schematic, briefly describes its operation, and shows ...
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Simple equivalent circuit model for batteries
So I have no knowledge about batteries and I just came across the phrase (simple equivalent circuit model (linear second order system)) when dealing with an exercise about batteries and the ...
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Digital Potentiometer LTSpice Model
I'm looking to simulate a circuit in LTSpice which uses a U/D-style digital potentiometer like the Analog Devices AD5220. Is there an existing component model with this type of functionality?
If not, ...
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Stability analysis of hybrid discrete-continuous systems
I'm trying to derive the overall state-space system model for a hybrid system, in order to plot its eigenvalues.
The system is shown as follows:
Which is originally from this paper: Modeling and ...
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2
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456
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Flyback converter small-signal model
I am currently designing a flyback converter and I am interested in measuring the stability of the converter (with a Bode plot). I will try to connect an isolation transformer on the feedback loop ...
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Modeling a NAND flash cell (a MOSFET with a floating gate)
After checking the ADS component palette, I found there are some MOSFET models available but there are no NAND flash cell models.
How do I create one?
A NAND flash cell can hold different states (...
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Find the differential equation of a control system via its block diagram
I have this block diagram:
I need to find the differential equation that represents the behavior of the control system, but I don't know what to do with the inner and outer feedback. I tried to ...
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BJT Is Saturation current temperature dependence singularity
So, I am currently looking at the ways transistors change their parameters with temperature according to SPICE for a thorough investigation of synthesizer VCO exponential converter. Particularly, the ...
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Characterizing "quadratic current" in an NMOS
I'm designing an integrated circuit where a series of NMOS with their sources tied to GND and their drains tied together work as parallel current sources. The total added current \$I_D\$ that I'd like ...
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What is the mathematical equation/function for lithium ion battery recharge time in the constant-voltage phase?
I'm trying to program a simple two phase battery recharge model in Python where the constant current (CC) phase is linear with respect to recharge time and state of charge (charge capacity).
However, ...
