# Questions tagged [graph]

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55 questions
87 views

### Direction of current flow in resistor networks

We have a simple resistor network $g$ with $5$ nodes and $6$ edges (resistors) as given below: We assume all resistors have the same resistance (say $1$ Ohm, so homogeneously distributed ...
36 views

### Find admittance( G ) matrix of a resistive circuit

I am taking Signals And Systems class where I have to calculate the admittance parameter of a given circuit. A given circuit for example: This is tedious and calculating the parameters takes so long....
49 views

### Zener diode equation proof (chacteristic curve)

I'm trying to prove this equation(at least I think that's the correct one): which produces this graph: I can prove the one that describes the PN diode but I am not sure what I should do differenly ...
103 views

### Thevenins theorem + two diodes and a resistor using graphical solution

I've got a homework to solve this circuit by a thevenin's theorem and get a current and tension of the diodes using graph. I've looked all around the Internet and couldn't find one single video that ...
61 views

### PSPICE graphs work separately for subcircuits, wrong when combined?

I'm working on a pulse generation circuit that will be used to drive an ultrasonic transducer. The following circuit is giving an unexpected output. It might look complicated, but really it can be ...
38 views

### i-v graph, how to find current and its behavior

I have this circuit and I am trying to make a i-v characteristic chart. I see that it has 2A as displayed, so would I split it between the 4 ohm resistor and the left side element? In addition, I am ...
109 views

### iv characteristic graph confusion

I am trying to understand how a iv graph for a battery rated at 10V with internal resistance of 10 Ohms would look like. I was thinking it would just be a constant 10V for the graph, however, I am ...
47 views

### Graphical method for obtaining waveshape of current

I was doing exercises of the book Electrical Engineering Fundamentals by Vincent Del Toro. Then I saw this question. The voltage waveform shown in fig is applied separately to a pure capacitor of 1 F ...
51 views

### Edge betweenness centralities for distribution grids [closed]

Graph centralities like edge betweenness centralities are commonly used to study the vulnerability in transmission networks, can they equally be used to study radial distribution networks ?
40 views

### What is the exact value of voltage at T in square wave form?

at t=0s v=1V; T=5ms v=1,0,-1? which one? looking at graph.
60 views

### How to change FFT spike to curve

The first picture is a part of my circuit and the voltage pass through the high filter circuit. The second picture shows an FFT spike which is obtained from the .csv file created by oscilloscope. I ...
399 views

### LTSpice y-axis swap

When plotting values of 2 different types (in my case voltage vs time and current vs time), is it possible to swap the y axes to the opposite side? At the moment my circuit plot shows voltage on the ...
83 views

### Relative responisivity of the VEML6040

I'm currently working a project involving the VEML6040 color sensor (Link to application note). I am reading through the application note and stumbled on the graph depicted below. As far as i ...
20 views

### Is there anything called “non-fundamental” cut set matrix?

I'm a bit confused about cut-set matrices. For writing a cut set matrix for a circuit do we only consider fundamental cuts? Or would that make it a "fundamental"-cut set? Is there anything called a "...
544 views

### How to plot an impedance vs frequency graph in Proteus?

I'm designing a circuit that simulates the impedance behavior of a real world speaker, which is not purely resistive and looks something like this: I already got the basic circuit but need to tweak ...
1k views

### Calculating the period, frequency, and confirming multimeter readings

I have some readings from an Oscilloscope that I want to take info from and calculate the period, frequency, and then confirm some multimeter readings I took. For the 1st: The function generator had ...
169 views

### Why the current in this graph is so strange?

I have a question about a 3-phase 400V motor used by an hydraulic pump. I read its currents and their graph is quite strange to me, far from the usual (deformed) wave. What could be going on here?
60 views

### Rectangular signal

Can someone explain me how do I take the first derivative of the given function and how will this function look like ?
113 views

### Confusion regarding diode rectification circuit graph

I have this question: This is how I went about answering this question: In the above question, it's telling us to presume the ideal diode model. Therefore the D4 (diode 4) is in forward bias when ...
434 views

### Transfer characteristic of circuit

I'm trying to find out the transfer curve (Vin Vs Vout) of the circuit given below. I approached this way: Is it the right curve?
414 views

### Zener diode characteristic graph

I'm having problem in understanding characteristic of zener diode. In the circuit zener voltage is 5.1V and source voltage is 10V. When i simulated in a circuit simulator i got the voltage vs time ...
200 views

### Resistance of a fully conected graph?

How would one approach to solving for the resistance between any two nodes of a fully connected graph with an arbitrary number of nodes n and arbitrary resistance between them ? (resistors omitted ...
64 views

### Understanding equilibrium equations

I initially asked this question on math.stackexchange.com, but nobody answer so I thought I could try to ask here, this at least to some degree related to electrical engineering. Please help me to ...
83 views

### Strange output of Temperature probes

I've got 8 ds18b20 (knock-off I assume) temperature probes monitoring the temperature in a freezer. I'm outputting the value of those probes each minute to an RRDTool graph using a Raspberry Pi. ...
137 views

### Phase between two sinusoids and which one is leading

that's my first question here. I'm studying fundamentals of electric ciruits and I faced this question: Determine which one leads and by how much: $$v1(t) = 4*\cos(377t + 10)$$ v2(t) = -20*\cos (...
101 views

### How to deal with the ground node in circuit graph and the gains of dependent sources?

in this circuit I am asked to find the gains of both dependent current and voltage sources. I've drawn the circuit graph and done the analysis that I had supposed. But I am not sure about whether ...
879 views

### debounce state machine graph

I need to make the graph for a state machine that debounces an input signal, maintaining the current up/low input signal for a certain time, and to calculate this time im using a counter. I am having ...
182 views

### Understanding data-flows graph

I've been trying to improve my understanding of optimization of digital circuit. With such goal in mind I've been studying from this book. I've been trying to understand mathematically the meanings of ...
489 views

### Current flow through inductor (large inductance) in AC circuit

I fail to understand why does the current flow in one direction only initially at t=0 in an AC circuit.. also when inductance is increased the time take for the current to stabilize and move in equal ...
69 views

### Sampling error in Lpc1769's Adc

I am trying to sample sin wave using Lpc1769's Adc. I am sampling signal using adc and send this data to pc using serial port (115200 baud rate). My sampling frequency is 1.5 kHz. When I sample 100 Hz ...
162 views

### Finding CutSet Matrix from a Circuit

I have the following question My answers are Please let me know if my approach and answer is correct to find the Cut Set Matrix.
55 views

### Diode Circuits Help

1) Assuming the input is expressed as Vin = V0 cos ωt, plot the output of each circuit in the figure below as a function of time. Use an ideal diode model. In the following problems, assume VB=2 V ...
93 views

### Determining the mathematical relationship in log graph please?

so lets say i have a log graph where the Y axis is measured in dB , while the X axis in Frequency. Y axis = from 0 to 90 dB X axis = from 0 to million Hz If 55 dB has 15KHz. Q1) How can i know ...
63 views

### Determining the inital phase of a waveform

How could I determine the initial phase of the following sinusoids with these parameters only ? from what I can see , I know that B is leading C since the crest is behind the Y axis .. Therefore , B ...
114 views

### How can i measure the slope of the tangent in this graphic scale ? [closed]

Hello i am having a difficulty in dealing with this scale , i need to measure the slope of (slope1) by the simple equation y/x .. could you do that one only for me thanks
127 views

### Circuit to indicate 1 to 10 based on pressed switch

I am looking for a circuit which can turn ON/OFF 10 LEDs based on the switch pressed (push to ON, release to OFF). It is like an LED graph. My requirement is: ...
441 views

### How do I draw M-PAM curves of Channel Capacity Vs SNR?

I've seen the following figure in several different articles: (this one was taken from here) I understand that channel capacity of the Gaussian signal is ...
124 views

### V-I curve for Stepper Motor

I am new to stepper and want to know how velocity-current graphs are plotted for stepper motor. Is the speed graph plotted against the overall current drawn by the motor or it's single winding current?...
2k views

### BJT Ic vs VBE graph in Proteus simulation

I'm trying to simulate the behavior of a BJT on Proteus. The image below shows the graph that I got when I plotted $I_c$ on the vertical axis vs. $V_{BE}$ on the horizontal axis. But according ...
52k views

### Plot a 50Hz Sine Wave in Excel [closed]

I am trying to show a visual representation of a few cycles of a 50Hz and 60Hz sine wave at 400 Volts overlapping and trying to find out how to create this as a chart in Excel. Does anyone know how ...
2k views

### how to express y(t) as function of x(t) from a given two signal?

is there a simple way to answer ? I couldn't do it by finding the equation of the two signal and then proceed like any problem in math
830 views

### How to use a graph of a wavefunction (psi) to create an approximate graph for potential (U)?

I don't understand how the top graph was used to approximate the bottom graph, could someone please explain to me what was going on? I know that in regions 1, 3, 5, 7, there is no oscillation and ...
15k views

### What do ripples in frequency response curve of filters depict?

I am trying to understand the frequency response curve of various types of filters (Butterworth, Chebyshev etc). The curves are shown here for reference : One thing I do not understand is what do ...
509 views

### Drawing One-sided Magnitude Spectrum of Transmitted Signal in dBW

Question The voltage waveform measured at the 50ohm antenna terminal of a 11750-kHz AM (DSB-LC) short-wave broadcasting transmitter is shown in Fig. Q3. How to draw the one-sided magnitude spectrum ...
3k views

### PSpice Op-Amp Sawtooth Wave

I've got this homework about PSPice and op-amp. I need to make this triangular waveform and sawtooth(?) waveform of non-inverting op-amp circuit. I know the triangle one is 500us like the picture. ...
50 views

### Graph of the output Vo for a given Vi in a diode circuit explanation [duplicate]

We have the following diode circuit: We have found when the diode is on and off. I perfectly understand this. Now the teacher gave an extra question that I don't understand. What is the output Vo (...
1k views

### Can I make pulsing light using AC as source, a diode and a LED?

I'm new to this branch of physics hence my stupid question. I know that diodes are used to make current flow in only one way. If I connected an AC source to a diode and the diode to a small light ...
1k views

### Operational amplifier circuit with one ac and one dc voltage source

The following circuit contains ideal operational amplifier, Vs voltage is sinusoidal with amplitude of 1Volt and frequency of 1kHz, where VE is a dc voltage of 2Volts. I am trying to use ...
Here is the graph that I'm trying to achieve. $H(s) = \frac{1}{s^2 + 2s + 100}$ $H(s) = \frac{1}{100(\frac{s^2}{100} + \frac{2s}{100} + 1 )}$ $\zeta = 1$ and $\omega = 100$ which indicates ...