Questions tagged [plot]

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15 views

How plot result in 'Measure' of HSPICE programming?

I need to plot "result" parameter in below command in HSPICE: .measure tran result ... How do this? thanks.
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3answers
51 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 ...
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1answer
43 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 ...
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1answer
21 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 ...
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13 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 ...
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0answers
34 views

How can we plot Non minimum Phase system Root Locus?

I have a closed-loop transfer function $$ H(s)=\frac{K(2-s)}{s(s+18)}.$$ I know that this is Non-Minimum Phase system, but I could not determine the points that cut through the real axis, the ...
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2answers
47 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. ...
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0answers
43 views

Zooming in closely in LTSpice moves the cursors

I'm sorry if this has already been answered, but I could not find anything related to this, even in LTSpice documentation. Whenever I place a cursor on whatever point of an LTSpice plot, if I zoom in ...
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0answers
27 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. ...
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3answers
83 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 ...
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2answers
71 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
43 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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63 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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1answer
796 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
616 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
368 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 ...
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1answer
489 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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274 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 ...
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1answer
1k 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
260 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
1k 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
5k 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
702 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
5k 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
674 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
2k 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
354 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
2k 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
92 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
2k 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
478 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 ...
6
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1answer
4k 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
2k 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
267 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 ...