Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [analysis]

Questions attempting to analyze the mathematical properties of a formula, the inner workings of a protocol, or the design of a given circuit.

Questions attempting to analyze the mathematical properties of a formula, the inner workings of a protocol, or the design of a given circuit.

Mathematical analysis is the part of mathematics concerned with the theory of functions and the use of limits, continuity, and the operations of calculus.

Engineering analysis involves the application of scientific analytic principles and processes to reveal the properties and state of the system, device or mechanism under study

293 questions
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Cross section of ceramic capacitors

I am trying to make a fault analysis of a bunch of ceramic capacitors. Short description of the application: 10 220 µF ceramic capacitors 1210 package are placed in parallel with a 3.6 V battery. A MCU wakes up periodically (maximum once per…
Filippa
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Puzzled by Nyquist frequency

Say I have a 1kHz sine, so no higher harmonics, then I need to sample it at least at 2kHz to be able to reconstruct it. But if I sample at 2kHz, but all my samples are on the zero-crossing, then my sampled signal doesn't show a sine at all, rather…
Federico Russo
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What's the difference between MOSFETs and BJTs (from a circuit analysis perspective)?

When analyzing circuits with transistors in them, when does it make a difference whether they are MOSFETs or BJTs?
Andres Riofrio
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Will this mains disconnect circuit work?

The purpose of this circuit is to disconnect a home wiring from the grid when there is a power failure without having the power contactor coil working 24/7. Where I live, when the power is restored after a failure, there is always a voltage peak…
user316780
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1 answer

What happened to all of the Dynamic Signal Analyzers?

Decades back there were at least half a dozen instrumentation companies offering Dynamic Signal Analyzers (DSA's). Not Spectrum Analyzers, but rather Dynamic Signal Analyzers. The main differences being dual or multiple channel input and frequency…
docscience
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Differentiating between a square wave or sawtooth wave with a circuit...?

I want to build a simple sensor that takes a 100 kHz square or sawtooth wave with a known amplitude and outputs a high if it receives a square wave or a low for sawtooth. I'm pretty sure this requires some sort of comparator, but I'm not sure how to…
Paul
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Why does this circuit oscillate?

The circuit below is an oscillator. When I simulate it with ltspice, it does indeed generate a waveform (although it doesn't seem to be a very pure sine wave). What I fail to understand is why it oscillates. All the basic literature I have read so…
blondiepassesby
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How to analyze this diode circuit?

I am trying to analyze this simple diode circuit by hand, but I can't seem to get too far. simulate this circuit – Schematic created using CircuitLab Using circuit lab, it is evident that current will flow through both diodes, which makes sense to…
Zimulator
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White and Pink Noise Generator Circuit - Cryptic AC Analysis

The “Electronic Devices and Circuit Theory” book (by Boylestad, Nashelsky) gives a brief description of a random noise generator circuit at the end of “BJT AC Analysis” chapter. (Btw, exactly the same circuit appeared in the IET magazine, April…
RayX
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Predicting thermal equilibrium: what's wrong with my time constant?

I understand that this is arguably a peripheral electronics problem, but it seemed to fit here better than in physics. I've been doing some power electronics design work with large IGBTs mounted on forced-air aluminum heat sinks. To run thermal…
Stephen Collings
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Engineering Electronics: which approximation is usually good enough?

I have a strong computational background, so approximations with floating point precision depend on the type of computation. One thing is to know how to make an approximation and another one is when to do one. Sometimes in Chemistry I was asked to…
OFRBG
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Reading a circuit

Disclaimer: I am a beginner. I am reading a knol book on electronics, and I am faced with this schematics: How do I read a circuit to understand what it does ? Do I have to imagine the electrons flowing, or is there a better strategy ? Another…
Stefano Borini
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Why is power of a signal equal to square of that signal?

Is there any logic as to why the power of a signal \$\mathrm{x(t)}\$ is taken as \$\mathrm{x^2(t)}\$? I searched everywhere and there's no clue. My professor told: "It's a standard result so shut up!"
Rishikesh
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Circuit analysis - software?

Surely there is some software that lets you draw a simple circuit diagram (DC voltage source and resistors) and then tell you the voltage, current, resistance, and power on R1, R2, R3, etc as well as totals.. instead of having to do it by hand,…
Luke Allen
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Order of precedence for parallel operator

In electrical engineering the parallel operator || gives half the harmonic mean of two values. E.g.: \$R_1 \parallel R_2 \equiv \frac{1}{1/R_1+1/R_2} \$ But how should you compute \$kR_1 \parallel R_2 + R_3 = \ ? \$ Is there a commonly accepted…
HKOB
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