diff options
Diffstat (limited to '3754/CH20/EX20.11/20_11.sce')
| -rw-r--r-- | 3754/CH20/EX20.11/20_11.sce | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/3754/CH20/EX20.11/20_11.sce b/3754/CH20/EX20.11/20_11.sce new file mode 100644 index 000000000..1f1868ec4 --- /dev/null +++ b/3754/CH20/EX20.11/20_11.sce @@ -0,0 +1,23 @@ +clear//
+
+//Variables
+
+VSmin = 19.5 //Minimum source voltage (in volts)
+VSmax = 22.5 //Maximum source voltage (in volts)
+RL = 6.0 * 10**3 //Load resistance (in ohm)
+VZ = 18.0 //Zener voltage (in volts)
+IZmin = 2.0 * 10**-6 //Minimum zener current (in Ampere)
+PZmax = 60.0 * 10**-3 //Maximum power dissipation (in watt)
+rZ = 20.0 //Zener resistance (in ohm)
+VL = VZ //Voltage across load resistance (in volt)
+
+//Calculation
+
+IZmax = (PZmax / rZ)**0.5 //Maximum value of zener current (in milli-Ampere)
+IL = VL / RL //Load current (in milli-Ampere)
+RSmax = (VSmin - VZ) / (IZmin + IL) //Maximum value of regulating resistance (in kilo-ohm)
+RSmin = (VSmax - VZ) / (IZmax + IL) //Minimum value of regulating resistance (in kilo-ohm)
+
+//Result
+
+printf("\n Magnitude of regulating resistance should be between %0.1f ohm and %0.0f ohm.",RSmin,RSmax)
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