ruby
def a(jw, p1, p2)
  i = Complex(0,1)
  return (i*jw/(i*jw+p1)) * (1/(1+i*jw/p2))
end
ruby end

title "Transistor Amplitude and Phase Frequency Response"
xlabel '$j \omega$ (radians)'
ylabel 'Magnitude of $A(j \omega)$'
legend-inside tc:0.5,0.85 /scale=1.1 /frame-fill-color=white
math /xrange 1.1:9e4 /log=true
xlog true
ylog true
plot 'a(x, 10,10000).abs' /legend='$\left|A(j \omega)\right|$'
y2
ylog false
axis-style left /log=true
margin 0.03
label-style right_label /text='Phase of $A(j\omega)$ (degrees)' /shift=2.1
plot 'a(x, 10,10000).arg*180/PI' /legend='Argument of $A(j \omega)$'
bg_lines = "/style=Dots /width=0.7"
background-lines x Grey $(bg_lines)
background-lines right Grey $(bg_lines)