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Original file (SVG file, nominally 600 × 500 pixels, file size: 71 KB)
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Summary
| Description |
English: Principle of the intersective pulse width modulation (PWM). Created with maxima.
Русский: Принцип перекрёстной широтно-импульсной модуляции |
| Date | |
| Source | Own work based on: Pwm.png by CyrilB |
| Author |
Vector: |
| Other versions |
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| SVG development |  This W3C-invalid diagram was created with Gnuplot.  This plot uses embedded text that can be easily translated using a text editor. |
Source Code
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sawtooth(t) := t - floor(t);
freq : 0.05$
sinesignal(t) := (1/2)+(499/1000)*sin(2*%pi*freq*t);
pwm(t) := if(sawtooth(t) >= sinesignal(t)) then 0 else 1;
load(draw)$
n : 1e4;kill(crossing);
crossing : (x:[0],
for i:0 while i<20*n do
if( pwm(i/n)#pwm((i+1)/n) ) /* detect edge */
then x:append(x,[(i/n)]),
setify(x));
length(crossing); /* copy the x-tics from here */
source : gr2d(
font="Times",nticks=50,
grid=true,ytics={0,1},yrange=[-.25,1.25],
user_preamble="set format x "";set xlabel "" 0,1;
set bmargin 0;set tmargin 0",
xtics= {0,0.592,0.999,1.762,1.999,2.893,2.999,3.973,
3.999,4.998,4.999,5.975,5.999,6.911,6.999,7.816,7.999,
8.698,9,9.567,10,10.432,
10.999,11.301,11.999,12.183,12.999,13.088,13.999,14.024,
14.999,15.001,15.999,16.026,16.999,17.106,17.999,18.237,
18.999,19.407,19.999},
xlabel="",ylabel="source signals",
explicit(sawtooth(x),x,0,19),
color=red,explicit(sinesignal(x),x,0,19)
)$
pwm_plot : gr2d(
font="Times",nticks=50,
grid=true,ytics={0,1},yrange=[-.25,1.25],
user_preamble="set format x "";set bmargin 2.25",
xtics= {0,0.592,0.999,1.762,1.999,2.893,2.999,3.973,
3.999,4.998,4.999,5.975,5.999,6.911,6.999,7.816,7.999,
8.698,9,9.567,10,10.432,
10.999,11.301,11.999,12.183,12.999,13.088,13.999,14.024,
14.999,15.001,15.999,16.026,16.999,17.106,17.999,18.237,
18.999,19.407,19.999},
xlabel="Time",ylabel="PWM signal",
color=magenta,explicit(pwm(x),x,0,19)
)$
draw(terminal=svg,file_name="Pwm",
source,pwm_plot);
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This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. | |
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| This licensing tag was added to this file as part of the GFDL licensing update. |
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
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Original upload log
This image is a derivative work of the following images:
- Pwm.png licensed with Cc-by-sa-2.5,2.0,1.0, Cc-by-sa-3.0-migrated, GFDL
- 2006-03-23T08:44:47Z CyrilB 1500x1050 (87343 Bytes) Cyril BUTTAY Principle of the intersective pulse width modulation (PWM). This figure has been made using gnuplot 4.0 and the following code: # This file is used to generate a plot that explains the # principle of the inte
Uploaded with derivativeFX
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:44, 29 May 2011 | | 600 × 500 (71 KB) | Krishnavedala | {{Information |Description=Principle of the intersective pulse width modulation (PWM). Created with following maxima code. <source lang="gnuplot"> sawtooth(t) := t - floor(t); freq : 0.05$ sinesignal(t) := (1/2)+(499/1000)*sin(2*%pi |
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