# This file is used to generate a plot that defines the 
# concept of duty cycle

# graph configuration
set terminal postscript eps enhanced "Times-Roman" 18 color solid
set encoding iso_8859_15
set size 1,0.5
unset title
set line style 1 lt 3 lw 3 pt 0 ps 0
set border 15 lt 7 lw 4

set grid xtics ytics
set xlabel "Time"
set samples 1000

# equation of the signal
dutycycle=0.6666666667
signal(x) = x-floor(x)>dutycycle?0:1

set xtics ("0" 0,"0.67*T" dutycycle,\
        "T" 1, "T+0.67*T" 1+dutycycle,\
        "2T" 2, "2T+0.67*T" 2+dutycycle,\
        "3T" 3, "3T+0.67*T" 3+dutycycle)
set ytics ("0 V" 0, "5 V" 1)

set output "pwm-example-2.eps"
plot [0:3.5][-0.25:1.25] signal(x) ls 1 title ''