diff options
Diffstat (limited to '3754/CH22/EX22.20/22_20.sce')
| -rw-r--r-- | 3754/CH22/EX22.20/22_20.sce | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/3754/CH22/EX22.20/22_20.sce b/3754/CH22/EX22.20/22_20.sce new file mode 100644 index 000000000..6cc348693 --- /dev/null +++ b/3754/CH22/EX22.20/22_20.sce @@ -0,0 +1,24 @@ +clear//
+
+//Variables
+
+VCC = 12.0 //Source voltage (in volts)
+RE = 100.0 //Emitter Resistance (in ohm)
+RC = 1.0 //Collector Resistance (in kilo-ohm)
+R1 = 25.0 //Resistance (in kilo-ohm)
+R2 = 5.0 //Resistance (in kilo-ohm)
+VBE = 0.7 //Emitter-to-Base Voltage (in volts)
+betamin = 50.0 //Common emitter current gain (min)
+betamax = 150.0 //Common emitter current gain (max)
+
+//Calculation
+
+Vth = VCC * (R2 /(R1 + R2)) //Thevenin's voltage (in volts)
+Rth = R1 * R2 / (R1 + R2) * 10**3 //Thevenin's equivalent resistance (in ohm)
+IE1 = (Vth - VBE)/(RE + Rth/betamin) //Emitter current (in Ampere)
+IE2 = (Vth - VBE)/(RE + Rth/betamax) //Emitter current (in Ampere)
+perc_change = (IE2 - IE1) / IE1 * 100 //Percentage change in the value of beta
+
+//Result
+
+printf("\n The percentage change in collector current is %0.1f .",perc_change)
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