diff options
Diffstat (limited to '3754/CH24/EX24.3/24_3.sce')
| -rw-r--r-- | 3754/CH24/EX24.3/24_3.sce | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/3754/CH24/EX24.3/24_3.sce b/3754/CH24/EX24.3/24_3.sce new file mode 100644 index 000000000..032ea7c2a --- /dev/null +++ b/3754/CH24/EX24.3/24_3.sce @@ -0,0 +1,23 @@ +clear//
+
+//Variables
+
+VCC = 20.0 //Source voltage (in volts)
+RC = 5.0 //Collector resistance (in kilo-ohm)
+RE = 1.0 //Emitter resistance (in kilo-ohm)
+RB = 100.0 //Base resistance (in kilo-ohm)
+beta = 150.0 //Common emitter current gain
+
+//Calculation
+
+IC = VCC / (RE + RB/beta) //Collector current (in milli-Ampere)
+IE = IC //Emitter current (in milli-Ampere)
+r1e = 25.0 / IE * 10**-3 //a.c. resistance of emitter diode (in kilo-ohm)
+Ri = beta * (r1e + RE) //Input resistance looking directly into the base (in kilo-ohm)
+Ris = RB * Ri / (RB + Ri) //Input resistance of the stage (in kilo-ohm)
+Av = RC / RE //Voltage gain
+Gp = 10 * log10(Av) //dB power gain (in decibel)
+
+//Result
+
+printf("\n Input resistance looking into the base is %0.0f kilo-ohm.\nInput resistance of the stage is %0.0f kilo-ohm.\nVoltage gain is %0.3f .\ndB voltage gain is %0.0f dB.",Ri,Ris,Av,Gp)
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