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.
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NEPLAN Load Flow Analysis with 1-day measurement
currently I am working on a project to identify energy loses in an electrical network. I am using NEPLAN 10, and already build a small system and implemented measurements. As soon as start the ...
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Analyzing effects of sixth order transfer function
This question is in relation to this question asked before (Settling time of sixth order denominator transfer function), but formulated in greater details.
So I have a transfer function which looks as ...
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Analysis of BJT RC Phase Shift Oscillator
I have designed an RC phase shift oscillator and it works in LT spice but i want to know if the analysis i have did on this circuit is correct or not. I want to calculate the "gain" as well ...
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Please help me perform DC analysis of the attached circuit and derive equation for VB (Q1)
I am designing a differential pair with single supply source (Vcc), and I am very particular about not using split supply. I am using discrete current source for setting the tail current, and biasing ...
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Rectified Voltage doesn't seem possible
This is my first question on this forum. I recently bought a used guitar amplifier and have the schematic. It's been almost 30 years since I worked in electronics but I thought maybe I could handle ...
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How to assess worst case runtime and correctness of an assembly implementation?
Set off by a question on CodeReview, I revisited "8-bit AVR unsigned division".
Trying much the same as for below 8 bit/8 bit → Q, R implementation, I found assessment of cycle counts of an &...
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Communication protocol analysis via microcontroller board
I have an idea for my master's thesis.
I want to make a communication protocol analyzer and monitor the data on a PC via software I coded.
For the first stage, I need a kind of data acquisition system ...
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how to interpret results from circuit sensitivity analysis
If you do a search on circuit sensitivity, you come across a presentation from Ti that discusses it, Circuit Sensitivity.
In it, for example, they solve for the Q of a filter, and perform the ...
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RC Circuit Analysis Direction Changes Formula
In my Circuit Theory lesson, we were studying RC circuits and there was a question which I tried to make before our senior but I accidentally came up with a different answer due to choosing current ...
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Zero Volt-Seconds Assumption in SMPS
What is the logic behind using the “zero volt-seconds” assumption for the analysis of converters and what are the limitations of analysis based on this assumption?
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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 ...
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How to properly analyse this simple circuit?
I often get awfully confused when presented with circuits like this, and can spend around 20 mins looking at it trying to figure out exactly whats happening.
So the way i find the voltage across 100M ...
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Weird looking last bit in a CAN message
I did my first CAN bus design on a prototype PCB. Now I would like to verify if the CAN transceiver is working OK. So I connect a PC-CAN-USB debugger and my scope on the CAN_HIGH and CAN_LOW signal ...
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Free/Open Source alternative to TekScope Anywhere?
I'm trying to analyze a signal I got out of a scope on my PC and a program like TekScope Anywhere looks like it will do what I'm after.
How can I get plots and data of the scope?
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Scratched Transistor
I have an transistor that is used in mist maker circuit, but it's scratched for not understanding its model or numbers. how can I found out what type is this transistor?
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Zero-sequence circuit of a three-phase transformer
Although I have tried a lot, I can't draw the zero-sequence circuit. Can you help me?
This is my try. I could only come to some.
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feedback BJT ac analysis [closed]
I'm having trouble with a BJT question. How can we do ac analysis of this circuit?
My attempted solution is this:
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How to use the print step option in LTspice XVII?
I'm aware of the print_step option for transient analysis, but I can't seem to get it to work.
I'm using LTspice XVII for windows 10 to simulate a DC DC converter for about 3s (It is necessary to do ...
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LTspice - Extracting magnitude of signal from AC analysis using .meas and the phase
I want to be able to produce a measure function such that the output of that function would give me the magnitude of a signal when its phase is -360deg. I tried using .meas AC name FIND mag(V(out)) ...
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BJT conceptual doubt
I was given this problem in a problem set. I want to ask what will the voltage at Base when \$ \beta \rightarrow \infty\$.
My answer to the problem - When \$ \beta \rightarrow \infty\$ then width of ...
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Transistor analysis, how can I find the currents?
I am struggling with the currents and their directions.
Here you can see the simple circuit part.
Since Vth(EBJ)= 0.7, Vth(CBJ)= 0.7
I could calculate the VCE by V(CBJ)-V(EBJ)= Vc-Vb - (Ve-Vb) = ...
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1000V MELF Diode Intermittent Failure. Diode shows degrading reverse voltage characteristics
Hello to the electronics community in this forum. I am currently facing a MELF diode intermittent failures. These diodes failed when the final assembly (potted) is tested in a functional test after ...
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Please explain the purpose of the marked resistors and diode in this transistor relay driver circuit
Please explain what the circled components are for.
What is the difference between the \$V_{cc}\$ and \$V_{in}\$, can they be the same?
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DC analysis of P-type MOSFET circuit
For the following circuit I am trying to calculate the DC drain current \$I_{DQ}\$
I know firstly that while doing a DC analysis the capacitors act as open circuits. This means that there will be ...
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Equicalent circuit - RC // RC
I am doing a filter analysis of a simple network filter, requiring drawing some equivalent circuit to simplify the expression and analysis of the transfer function.
The issue I've got is regarding a ...
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is it possible to make asynchronous down counter modulo 6 with 3 JK flip-flop?
in last week lab classes with my lecturer, we were asked to make an asynchoronous down counter mod 6 using jk flip-flop, but no one could make it until the end of the class. all of us has the same ...
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AC circuit analysis with a transmission line involved
I'm trying to perform an AC analysis of a circuit that contains a piece of coax cable. The input voltage 'Vs' is a swept frequency (1MHz-150MHz) voltage source with constant amplitude. What I'm ...
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Analysis of Preamp circuit
I found this schematic (in Spanish) and annotated it with my interpretation. Anyone care to correct me or add?
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superposition analysis technique
Below I am presented with the following circuit and asked to solve for the current through R1:
EDIT: in the diagram below I made a mistake, V2 is shown as 8V, it is supposed to be 40 V.
I apply a ...
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How to parse this protocol with an arduino?
I'm analyzing a signal from my building's intercom system to my tenant station. Intercom has two wires, +24V/0.27ma, and ground. Every 10 seconds, the system sends a "heartbeat" signal to the tenant ...
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Formally determining the minimum number of poles needed to realize some suggested switching arrangement
Many times, when designing passive switching circuits, one has the following engineering problem:
We know we want to have some number of switches, each with some number of throws.
For each possible ...
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Question about the MOSFET saturation condition
I'm solving a problem in my textbook and I got stuck, and I have the solution manual of the textbook, so I went to see through the solution and I found a thing that I suspect to be wrong, due to my ...
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SDA pin on I2C lines seems weird
I am trying to analyze the I2C commands sent by a PC software to R3910 DSP chip
The software uses a programming box (provided by the same company that manufactures the R3910 chip) to communicate ...
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Capacitor Discharging Time under a Sinusoidal Voltage Source
I just can't find the correct solution to the following, pretty basic problem:
A capacitor \$C\$ is continuously discharged by a resistor \$R\$. This is easily described by an exponential decay (\$\...
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Confused about equivalent resistance
I know resistors in series have the same current, and resistors in parallel have the same voltage drop, but in practice, I can't get the equivalent resistance right. Wondering if anyone has tips/...
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Using current divider to see how much current goes inside the plane when lightning strike
I am working on a project that requires me to understand how engineers do current analysis. The aircraft has a metallic body which provides a path for lightning when it strikes but what if there is an ...
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Using mesh analysis find all current
Using mesh analysis find all the current in the given circuit
Schematic redrawed:
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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 ...
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DQ frame in foc of induction motor
How to find the orientation of DQ axis of rotor and stator in induction motor using iq and Id currents?
Particularly in foc of im, I have measurement of stator ia, ib, ic and rotor omega. However, ...
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Help to determinate stability of Opamp Circuit
I have background in software but this time I need to build a circuit for scaling a signal from 15 to -15 VDC. At college I took some subjects on Electrical topics so I have read to remember, after ...
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Finding a Fourier series of a Burst Fired sine wave having consecutive 2 cycles on & 2 cycles off?
I have been trying to find the solution of the following problem but with no luck.
I have a system that generates a waveform of sinusoidal type with the only difference being that this wave has 2 ...
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Electrical schematic symbol help(looks like an or gate)
I'm wondering if that little dot represents anything?
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How to calculate reactance from an impedance analyzer circuit?
Background
I have an impedance analyzer that uses the below circuit:
Source
One can measure impedance of the device under test (DUT) by using the following formulas:
...
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Mathematical therefore symbol (∴) needed for documenting circuit analysis calculations [closed]
When doing circuit analysis calculations I use the mathematical therefore symbol in my calculations and need to document my iterations to support my analysis. There is no ASCII code for the "therefore"...
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DC Analysis of Transistor Circuits - Double vertical line symbol
I have stumbled twice across this symbol || being used in the analysis of transistor circuits.
An example can be seen at this address: http://www....
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Mesh analysis to find Vx
simulate this circuit – Schematic created using CircuitLab
I'm trying to solve the following circuit using mesh analysis. Here is my equation. The goal is to find the value for Vx. **Vx is the ...
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Op-Amp analysis without using op-amp gain
I have a question concerning this op-amp problem for which I need to find an expression for \$v_{out}(t)\$, where \$V_B\$ has a constant value:
simulate this circuit – Schematic created using ...
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Node analysis with voltage source, How to solve with matlab?
So i have this matlab homework where i need to find voltage on Y2 and Y3 using node analysis. Arrows indicate direction of current flow in branches.
simulate this circuit – Schematic created ...
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Voltage transfer curve; MOSFET
How to classify the voltage transfer curve into various regions, as shown,
(In the image, \$V_0\$ refers to \$V_{DS}\$ and \$V_i\$ refers to \$V_{GS}\$)
Since, the various regions of operations are ...
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