Questions tagged [plot]

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2answers
67 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 ...
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1answer
41 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 ...
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0answers
55 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. ...
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0answers
173 views

Plot antenna radiation pattern in Matlab

I have the antenna radiation pattern exported from CST. The file is txt file format and contains the angles theta and phi and the directivity. First theta varies between 0 and 180° and phi is 0° and ...
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1answer
249 views

Constructing bode plot from experimental data and constructing a transfer function

I've been trying for a few days to convert an experimentally obtained (frequency against magnitude and frequency against phase) graphs to a bode plot and then construct a transfer function from the ...
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2answers
282 views

Obtain a Transfer Function from Bode Plot shown

I want to obtain a Transfer Function from the Bode Plots I already got the corner frequencies (approximates) and all the terms for my T.F. Then when I try to check my results in MATLAB my plot drops ...
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2answers
100 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
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1answer
301 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'...
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0answers
173 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 ...
1
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1answer
672 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 ...
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1answer
198 views

Bode plot of circuit with unknown values

I have the two following circuits with unknown values for R1, L and C, R2 is 1Kohm. I have attempted to find the transfer functions for these circuits and ultimately want to produce two bode plots ...
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2answers
738 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 ...
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2answers
3k 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 ...
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1answer
454 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.
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3answers
3k 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 ...
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1answer
489 views

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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2answers
1k views

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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1answer
321 views

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, ...
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2answers
1k views

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 ...
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1answer
82 views

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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1answer
1k views

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?
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2answers
427 views

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 ...
4
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1answer
3k views

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 ...
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3answers
1k views

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 ...
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1answer
221 views

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 ...