diff options
Diffstat (limited to '3754/CH26/EX26.7')
| -rw-r--r-- | 3754/CH26/EX26.7/26_7.sce | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/3754/CH26/EX26.7/26_7.sce b/3754/CH26/EX26.7/26_7.sce new file mode 100644 index 000000000..10fcfc0c6 --- /dev/null +++ b/3754/CH26/EX26.7/26_7.sce @@ -0,0 +1,41 @@ +clear//
+
+//Variables
+
+VCC = 10.0 //Source voltage (in volts)
+R1 = 800.0 //Resistance (in ohm)
+R2 = 200.0 //Resistance (in ohm)
+R3 = 600.0 //Resistance (in ohm)
+R4 = 200.0 //Resistance (in ohm)
+R5 = 100.0 //Resistance (in ohm)
+R6 = 1000.0 //Resistance (in ohm)
+beta1=100.0;beta2=100.0;
+VBE = 0.7 //Emitter-to-base voltage (in volts)
+
+//Calculation
+
+VR2 = VCC * (R2 / (R1 + R2)) //Voltage across resistance2 (in volts)
+IE1 = (VR2 - VBE)/R2 //Emitter current of Q1 transistor (in Ampere)
+IC1 = IE1 //Collector current of Q1 transistor (in Ampere)
+VC1 = VCC - IC1 * R3 //Voltage at the collector of Q1 transistor (in volts)
+VE1 = IE1 * R4 //Voltage at the emitter of Q1 transistor (in volts)
+VCE1 = VC1 - VE1 //Collector-to-emitter voltage of Q1 transistor (in volts)
+VE2 = VC1 - (-VBE) //Voltage at the emitter of Q2 transistor (in volts)
+IE2 = (VCC - VE2)/R6 //Emitter current of Q2 transistor (in Ampere)
+IC2 = IE2 //Collector-current of Q2 transistor (in Ampere)
+VC2 = IC2 * R5 //Voltage at the collector of Q2 transistor (in volts)
+VCE2 = VC2 - VE2 //Collector-to-emitter voltage of Q2 transistor (in volts)
+
+r1e1 = 25.0 / IE1 * 10**-3 //a.c. emitter diode resistance of Q1 transistor (in ohm)
+r1e2 = 25.0 / IE2 * 10**-3 //a.c. emitter diode resistance of Q2 transistor (in ohm)
+Ri2 = beta2 * (r1e2 + R6) //Input resistance of second stage (in ohm)
+Ro1 = R3 * Ri2 / (R3 + Ri2) //Output resistance of first stage (in ohm)
+Av1 = Ro1 / (r1e1 + R4) //Voltage gain of first stage
+Av2 = 1.0 //Voltage gain of second stage
+Av = Av1 * Av2 //Overall voltage gain
+
+//Result
+
+printf("\n Emitter current of Q1 transistor is %0.3f mA.\nCollector current of Q1 transistor is %0.3f mA.\nEmitter current of Q2 transistor is %0.3f mA.\nCollecotr-current of Q2 transistor is %0.3f mA.",IE1*10**3,IC1*10**3,IE2*10**3,IC2*10**3)
+printf("\n Collector-to-emitter voltage of Q1 transistor is %0.3f v.\nCollector-to-emitter voltage of Q2 transistor is %0.3f .",VCE1,VCE2)
+printf("\n Overall voltage gain is %0.2f .",Av)
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