# Questions tagged [plot]

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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 ...
65 views

### 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 + ...
57 views

### 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 ...
306 views

### 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?
225 views

### 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 ...
123 views

### 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. ...
42 views

### 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 vote
88 views

### 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 ...
361 views

### 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 ...
889 views

### .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 ...
3k views

### 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....
446 views

### 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, ...
59 views

### 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 ...
51 views

### 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 ...
431 views

### 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 ...
1 vote
1k views

### 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 ...
1 vote
1k views

### 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 ...
1k views

### 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 ...
358 views

### 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 ...
1 vote
101 views

### 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 ...
137 views

### 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. ...
142 views

### 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. ...
263 views

### 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 ...
72 views

### 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 ...
44 views

### 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 ...
1 vote
72 views

### 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. ...
1k views

### 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 ...
1 vote
2k views

### 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'...
518 views

### 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 ...
3k 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 ...
3k views

### 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 ...
17k views

### 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 vote
2k views

### 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.
9k views

### 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 ...