diff options
Diffstat (limited to '3754/CH24/EX24.4/24_4.sce')
| -rw-r--r-- | 3754/CH24/EX24.4/24_4.sce | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/3754/CH24/EX24.4/24_4.sce b/3754/CH24/EX24.4/24_4.sce new file mode 100644 index 000000000..8256ac632 --- /dev/null +++ b/3754/CH24/EX24.4/24_4.sce @@ -0,0 +1,23 @@ +clear//
+
+//Variables
+
+VCC = 12.0 //Source voltage (in volts)
+RC = 10.0 * 10**3 //Collector resistance (in ohm)
+RE = 1.0 * 10**3 //Emitter resistance (in ohm)
+RB = 500.0 * 10**3 //Base resistance (in ohm)
+beta = 50.0 //Common emitter current gain
+
+//Calculation
+
+IC = VCC / (RE + RB/beta) //Collector current (in Ampere)
+IE = IC //Emitter current (in Ampere)
+r1e = 25.0 / IE * 10**-3 //a.c. resistance of emitter diode (in ohm)
+Ri = beta * (r1e) //Input resistance looking directly into the base (in ohm)
+Ris = RB * Ri / (RB + Ri) //Input resistance of the stage (in ohm)
+Av = RC / r1e //Voltage gain
+AV1 = RC / RE //New voltage gain
+
+//Result
+
+printf("\n Input resistance looking into the base is %0.0f ohm.\nInput resistance of the stage is %0.1f kilo-ohm.\nVoltage gain is %0.2f .\nNew Voltage gain is %0.3f .",Ri,Ris,Av,AV1)
|