# Tagged Questions

This tag covers finding models for electrical and electronic components and circuits

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### Second order driving point impedance of RC network

I am trying to find the transfer function for the following second order model, but running into difficulty as I can't manipulate it into the standard form required for me to extract time constants. ...
265 views

### How, if at all, can a memristor be emulated with active components?

I find existing explanations of memristors are either overly vague, or an unapproachable mass of academic, mathematical analysis. I want to gain an intuitive understanding of what a memristor is, what ...
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### What is the radio models distance limit?

From how far could be a flying machine operated from a static station? What is the physical limit? 1km ? 5km? or 10km? Is the only problem of creating "drones" operated from your appartment the ...
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### Simulation software to terminate planar waveguides by geometry and material choice?

There are a lot of electromagnetics software modeling suites out there (HFSS, CST Microwave, Sonnet some I've heard of). I want to terminate a coplanar GS or GSG waveguide with 50 ohm. I know that ...
292 views

### Z(in) for small signal analysis with BJT for unbypassed emitter and r0 in place

I have been studying the small signal analysis of BJT with re model with the emitter terminal not bypassed. I am able to derive those Zi, Zo,Av, Ai long as ro is assumed to be infinite. But I am ...
373 views

### Spice model, can't figure it out

I am using LTSpice with the following NMOS model from the library included in the famous book 'Sedra & Smith, Microelectronic circuits' : ...
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### Directional pickup of human ear?

Given the following: x, y, z of omnidirectional source source x, y, z of center of listener's head pitch, roll, yaw of head What is a simple fuction that will return the decibel attenuation and ...
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### How do I construct a SPICE model from a data-sheet?

This may not be the ideal forum for the question; please migrate if a forum is better suited for the question. I'm looking at a component for which my attempts at locating a SPICE model online were ...
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### Matlab (fdesign.arbgrpdelay, fdatool) Group delay

I have the measurements of filter’s Group delay and S-parameters. The S-parameters are of the following form presented in a touchstone file ...
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### Modelling MEMS accelerometer's measurement noise using datasheet (ADXL330)

I'd like to model an Analog Devices ADXL330 MEMS accelerometer using data provided in its datasheet to estimate measurement noise. I'm using a simple mathematical model defined in the paper ...
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### Understanding the OSI Model

I'm currently documenting a wireless, microcontroller-based system that I've built and I would like to use the standard industry terminology to help anyone who comes behind me comprehend it easier. ...
529 views

### Brushless motor controlled via current source math model

I'd like to model a brushless motor's (BLDC) dynamic response using Matlab. I'm controlling the motor by an Elesctonic Speed Controller (ESC). I'd like to derive a transfer function of such a circuit ...
261 views

### Modeling Power MOSFET with Matlab

I decided to give SimPowerSystems in Matlab a try. My problem is that I find the notation quite confusing, it seems rather different from the one usually found in data sheets. Take for instance this ...
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### Bridge Rectifier Average Value Modeling

I had previously posted a question regarding modeling the transfer function of a diode rectifier but it sounds like this not possible. So I have done some reading on "Average Value Modeling" and it ...
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### Trying to simulate a PWM model of a boost converter in gnucap

There's a paper called "Simplified Analysis of PWM Converters Using Model of PWM Switch (part 1)" by Vatché Vorpérian which introduces a "PWM switch" to model the switch and diode in a switching ...
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### Can the Ids equation of MOSFETs be applied to real devices?

In my engineering course, we have studied MOSFETs a lot, and always in the context of integrated circuits. And what we have been teached is that (in the basic approximation), its current is given by ...
514 views

### Mathematical models for vacuum tubes?

Are there any commonly accepted algebraic models for vacuum tube operation (triode, tetrode, and pentode)? In the same way that BJTs have a Gummel-Poon or Ebers-Moll model, and (macroscale) MOSFETs ...