Questions tagged [plot]
The plot tag has no usage guidance.
44
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PSIM Plot with x-axis replaced by one parameter other than time
I am in PSIM and want to get a plot similar to the one below. The plot shows the relationship between two parameters. So, how can I generate this plot? In other words, how can I change the x-axis from ...
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1
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65
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Linear line on loglog plot
I'm trying to plot a -20dB/dec line on MATLAB but can't seem to get it correct. I know that a linear line in a loglog plot is actually an exponential curve in the linear scale.
So writing a y = mx + ...
- 366
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1
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57
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Strange plot of voltage source in CMOS inverter circuit simulation
I made a simple simulation of a CMOS inverter in everycircuit and the results look reasonable enough when I just plot the voltages on the input and output nodes. But, for some reason, the voltage ...
0
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1
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306
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Is it possible to plot an equation in LTspice? I am supposed to plot an equation like this v(t)=d/dt(ln(pout(t)) + kPout(t)
In the equation mentioned above, Pout is the voltage at some output node in my schematic. Is it possible to plot the above equation? how to plot v versus time?
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225
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In LTspice, why doesn't the FFT plot update after a simulation?
I'm using LTspiceXVII (17.0.35.0). I run a simulation and make an FFT plot. Then I change a parameter and the time waveform updates, but the FFT plot doesn't update. I have only been able to see ...
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123
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How to plot both log scale in MATLAB
I'm trying to plot the below equation vs frequency in both log scale using the loglog() function on the x and y axes.
...
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42
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Poles and Zeros of this Bode Plot
I would like to ask how to approximate the following on this plot. I am so confused about where to look:
The poles, zeros, and the -3dB bandwidth frequency. Thank you.
1
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1
answer
88
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is it possible to control plot points independently of traces in LTspice plots
It would be nice to have a plot capability, where I could completely remove the plot traces, but keep the data points and also have control of the data point properties (sizes, etc). The attached plot ...
- 2,190
3
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1
answer
361
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Smooth wave plotting using 3 inch thermal printer [closed]
I am interfacing 3 inch Fujitsu thermal printer (FTP-638MCL103) with STM32. Character printing is working fine. I am struggling to print smooth sine waves generated from a function generator.
I want ...
- 41
2
votes
1
answer
889
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.four plot FF/t LTspice
I am trying to plot an FFT in LTspice using a .four command and the spice error log directly without using the FFT on LTspice (right click + view + FFT once the ...
- 87
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0
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3k
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LTspice - move the cursor to a particular run in the plot
After running a stepped parameter simulation, the cursor can be moved between different runs using the up and down arrows. This is impractical for a large number of runs. Is there a way to jump to e.g....
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2
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446
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Antenna radiation plot and negative gain values
In general, how to interpret the negative gain values on antenna radiation diagram plot? I have attached an example.
My guess is that they represent some value relative to some reference value. If so, ...
- 287
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0
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59
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Why don't I get a bell curve in the torque vs rotor position plot?
I have designed a inset PMSM. I tried to plot the torque vs. rotor position plot but I am not getting a bell curve. Like at the torque must be maximum only when theta is 90 degrees.
I don't know where ...
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51
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How do I ignore the content in a txt file while plotting on Matlab?
lovely friends!
The file in my impedance measurement data is in.txt format, with a title and numerous comments written on it. When I try to plot the data in Matlab, I get an error, which I assume is ...
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431
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How to draw SPL curve for a parametric equalizer?
I want to show (graphically) the Gain/Attenuation vs frequency of a parametric equalizer.
This is my circuit:
https://sound-au.com/project28.htm
The same schematicas as a screenshot:
I want to show ...
- 11
1
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1
answer
1k
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LTSpice, plot a current–voltage characteristic
I have LTSpice on macOS.
I would like to plot in x-axis the voltage v(2) and in y-axis the current I(R1).
But, when I add traces ...
- 141
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3
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1k
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How to move LTspice transient simulation plot so they don't overlap
I have a shift register circuit that I want to simulate, and so far, everything seems to work as intended, but I am having a bit of a hard time with the voltage plots. They all overlap, and since the ...
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1
answer
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Appending plots in LTspice
The single most important thing I miss in LTspice is the ability to plot things of multiple runs on top of each other. Cadence Virtuoso calls that "Append Plot".
What I mean: I want to plot ...
- 1,306
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358
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why plot of ''To Workspace'' of matlab does not fit the scope of simulink?
I am simulating a complete system for control loop. since I need the data to be saved on matlab, I wrote a small code that saves the data in matlab and I could plot.
my system has a sample time of ...
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0
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101
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Cadence simulation graph versus time
please do not know if there is a functionality in CADENCE in the graphs show differences in the times between them (make an average of two values). Regarding the delay of two waves [Automatically in ...
- 363
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2
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137
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Plotting a 20 MHz RF wave in Excel
How can I plot "F1(t) = 20MHz" in Excel?
I will eventually put it into mathcad. The amplitude would be a variable as well but lets pick 4.5 for now. Just get the 20 MHz wave to look how it should.
...
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142
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MATLAB - Docking figure
Can I see the editor and the plot in MatLab (docked view) in parallel?
This function doesn't work any longer and it was partially what I needed.
...
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3
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263
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choosing best n points on sine wave for wave generation
I want to generate a sine wave using DAC+DMA.
Currently, I have an example that generates a sine wave using DAC+DMA from an array of 60 points, at 8KHz.
I want to be able to increase the frequency up ...
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2
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72
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What could be the reason for these bands in this data acquisition measurement?
Here is zoomed view of 16 channel
The first plot looks very peculiar to me hence there are like two forbidden bands(looks like white lines as you see). This also appears if I plot any individual ...
- 1,767
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1
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44
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Maximising power received using two sets of data
I have done simulations where by I am varying two variables i.e. powerTransmit and frequency within an equation, for example:
powerReceived = powerTransmit - 20*log(frequency) - 20*log(distance)
The ...
- 2,079
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0
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72
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What exactly does the frequency spectrum represent?
The signals in the image represent a low pass signal and its Hilbert Transform. I know that a plot for a signal's magnitude with reference to frequencies can be found by applying a Fourier Transform. ...
- 225
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2
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1k
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how to plot two graphs on ltspice on the same y scale?
i want to plot more than one graph on ltspice , the first one shows the voltage vout according to vin , and the second one the derivative of vout to vin , but it shows the two graphs on two different ...
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1
vote
1
answer
2k
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Bode plot graph: Frequency vs. Angular frequency
I am wondering, why are some Bode plots made with \$f\$ or frequency of signal representing x-axis, and why other Bode plots use \$\omega\$ or angular frequency of signal representing x-axis? Why don'...
- 2,370
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518
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How to convert KiCAD pcb file to HPGL/1 for use with old HP plotter?
I intend to use my HP 7475A for directly plotting etch-resistant ink onto a pcb. My problem is that, while KiCAD has an option for HPGL exports, it only generates HPGL/2 compatible files. Those make ...
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1
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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 ...
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2
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3k
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Octave pzmap: format poles and zeros
This question is linked to this one:
Octave rlocus: format ploles and zero
I am using the Octave command pzmap but the size of the markers of the poles and zeros ...
- 143
2
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2
answers
17k
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How to plot dy/dx versus x of a given y=f(x) plot in LTspice?
Below is a plot of a sweep which shows how Vo changes versus Vi in LTspice:
How can I plot the "derivative of Vo" i.e dVo/dVi versus Vi?
How can I plot the "integral of Vo" versus Vi?
Edit:
I was ...
- 1,767
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1
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How to Plot X/Y in Java Circuit Simulator
Does anyone know how to select the Y variable when doing an X/Y Plot in Java Circuit Simulator? I tried many things and none have worked.
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3
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Change of transconductance for MOSFET
This plot represents drain current versus gate-source voltage (with different ranges of temperature):
Often the transconductance of MOSFET is defined as .
What is the difference between upper ...
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1
answer
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please explain the (default) Y-axis units in LTspice
I am modeling a simple transimpedance amplifier with a current source input and some extra components for the photodiode model.
For my AC plot the Y-axis says dB, not dbv (or dbV) so what am I ...
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2
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3k
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How to plot state space variables against time on unit step input?
I have a system defined in state space model with the following matrices
A =
$$
\begin{matrix}
0 & 1 & 0 & 0 \\
0 & 0 & 1 & 0 \\
-1280 & -...
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1
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2
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576
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Mirror PCB only, not the whole page when plotting as HPGL with KiCad
It's easier to place the PCB near the origin when using a pen plotter to draw it.
However, when I plot a mirrored PCB with pcbnew, it also changes the PCB position (it mirrors the whole page).
So, ...
- 121
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2
answers
3k
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Why would a sensor output an inverted signal?
I have a sensor that has 3 components: X, Y and Z and for every component there are 2 channels:
X+ :0 V ± 5 V voltage output
X- :0 V ± 5 V voltage output inverted
All I know is :
If the circuit ...
-3
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1
answer
101
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Simple Matlab Problem [closed]
I just started working with Matlab last week, so I'm very new. After searching for a while, I realized that I don't know how to fix a Matlab script that I'm working with. The problem is given below.
<...
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1
answer
3k
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How to save plots in ngspice
Is there a command or an option in the "plot" command that can generate png/jpg images of the plots?
- 31
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2
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820
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FETs transfer characteristics in 4 quadrants
Recently I was given a following problem on the test:
Usually, transfer characteristic (Id(Vgs)@Vds) of JFET and MOSFET is plotted in the 2 quadrants. Plot it in all 4.
After the test we were not ...
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1
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Kicad plotting/printing
I made a really simple scheme/pcb using Kicad (on Ubuntu 14.04). Now I'd like to print this and make my PCB, but I can't figure out how to properly plot the damn thing!
When I plot using gerber ...
- 61
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3
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3k
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Diode circuit I/V plot
simulate this circuit – Schematic created using CircuitLab
Hi,
I have started studying diodes and In one of the exercises of my book, I have faced a problem.The exercise wants a i/v ...
- 143
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1
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406
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How to realize a zero at infinity ? RC synthesis
I'm just trying to synthesize this bellow pole-zero map.
Since now I have come up with the following equation.
$$Z(s) = \frac{(s+1)(s+3)}{(s+2)(s)} $$
But I have no idea about how could I ...
- 1,695