Annotation of OpenXM_contrib/gnuplot/demo/electron.dem, Revision 1.1.1.1
1.1 maekawa 1: #
2: # $Id: electron.dem,v 1.4 1996/08/13 21:48:22 drd Exp $
3: #
4: # Electronics demo
5: #
6: # Bipolar Transistor (NPN) Mutual Characteristic
7: Ie(Vbe)=Ies*exp(Vbe/kT_q)
8: Ic(Vbe)=alpha*Ie(Vbe)+Ico
9: alpha = 0.99
10: Ies = 4e-14
11: Ico = 1e-09
12: kT_q = 0.025
13: set dummy Vbe
14: set grid
15: set offsets
16: set nolog
17: set nopolar
18: set samples 160
19: set title "Mutual Characteristic of a Transistor"
20: set xlabel "Vbe (base emmitter voltage)"
21: set xrange [0 : 0.75]
22: set ylabel "Ic (collector current)"
23: set yrange [0 : 0.005]
24: set key .2,.0045
25: set format y "%.4f"
26: plot Ic(Vbe)
27: set format "%g"
28:
29: pause -1 "Hit return to continue"
30:
31: # Junction Field Effect Transistor (JFET) Mutual Characteristic
32: # drain current above pinch off
33: Ida(Vd)=Ido*(1-Vg/Vp)**2
34: # drain current below pinch off
35: Idb(Vd)=Ido*(2*Vd*(Vg-Vp)-Vd*Vd)/(Vp*Vp)
36: # drain current
37: Id(Vd)= (Vd>Vg-Vp) ? Ida(Vd) : Idb(Vd)
38: # drain current at zero gate voltage
39: Ido = 2.5
40: # pinch off voltage
41: Vp = -1.25
42: # gate voltage
43: Vg = 0
44: set dummy Vd
45: set nogrid
46: set nokey
47: set offsets 0, 1, 0, 0
48: set title "JFET Mutual Characteristic"
49: set xlabel "Drain voltage Vd (V)"
50: set xrange [0 : 4]
51: set ylabel "Drain current Id (mA)"
52: set yrange [0 : 5]
53: set label "-0.5 Vp" at 4.1,0.625
54: set label "-0.25 Vp" at 4.1,1.4
55: set label "0" at 4.1,2.5
56: set label "Vg = 0.5 Vp" at 4.1,3.9
57: plot Vg=0.5*Vp,Id(Vd),Vg=0.25*Vp,Id(Vd),Vg=0,Id(Vd),Vg=-0.25*Vp,Id(Vd)
58: set nolabel
59:
60: pause -1 "Hit return to continue"
61:
62: # show off double axes
63:
64: # amplitude frequency response
65: A(jw) = ({0,1}*jw/({0,1}*jw+p1)) * (1/(1+{0,1}*jw/p2))
66: p1 = 10
67: p2 = 10000
68: set dummy jw
69: set grid x y2
70: set key
71: set logscale xy
72: set log x2
73: set nolog y2
74: set title "Amplitude and Phase Frequency Response"
75: set xlabel "jw (radians)"
76: set xrange [1.1 : 90000.0]
77: set x2range [1.1 : 90000.0]
78: set ylabel "magnitude of A(jw)"
79: set y2label "Phase of A(jw) (degrees)"
80: set ytics nomirror
81: set y2tics
82: set tics out
83: set autoscale y
84: set autoscale y2
85: plot abs(A(jw)), 180/pi*arg(A(jw)) axes x2y2
86:
87: pause -1 "Hit return to continue"
88:
89: # undo what we've done
90: reset
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