diff options
Diffstat (limited to '3754/CH29/EX29.16/29_16.sce')
| -rw-r--r-- | 3754/CH29/EX29.16/29_16.sce | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/3754/CH29/EX29.16/29_16.sce b/3754/CH29/EX29.16/29_16.sce new file mode 100644 index 000000000..490fd1d52 --- /dev/null +++ b/3754/CH29/EX29.16/29_16.sce @@ -0,0 +1,31 @@ +clear//
+
+//Variables
+
+hfe = 99.0 //hfe
+hie = 2.0 * 10**3 //hie (in ohm)
+Rc = 22.0 * 10**3 //Load resistor of frist stage (in ohm)
+R4 = 100.0 //Emitter resistance of first stage (in ohm)
+R1 = 220.0 * 10**3 //Biasing resistor of second stage (in ohm)
+R2 = 22.0 * 10**3 //Biasing resistor of second stage (in ohm)
+R1c = 4.7 * 10**3 //Load resistance of second stage (in ohm)
+R3 = 7.8 * 10**3 //Feedback resistor from collector of second stage to emitter of first stage (in ohm)
+
+//Calculation
+
+Ri = hie //Input resistance of first stage (in ohm)
+Ro1 = (1/Rc + 1/R1 + 1/R2 + 1/hie)**-1 //Output resistance of first stage (in ohm)
+Ri2 = hie //Input resistance of second stage (in ohm)
+Ro2 = R1c * (R3 + R4)/(R1c + R3 + R4) //Output resistance of second stage (in ohm)
+Av1 = hfe * Ro1 / hie //Voltage gain of first stage
+Av2 = hfe * Ro2 / hie //Voltage gain of second stage
+Av = Av1 * Av2 //Overall voltage gain without feedback
+beta = R4 / (R3 + R4) //Feedback ratio
+Ri1 = Ri*(1 + beta*Av) //Input resistance with feedback (in ohm)
+R1o2 = Ro2 / (1 + beta * Av) //Output resistance with feedback (in ohm)
+A1v = Av / (1 + beta * Av) //Overall voltage gain with feedback
+
+//Result
+
+printf("\n Voltage gain without feedback is %0.1f .\nInput resistance of first stage without feedback is %0.3f kilo-ohm.\nInput resistance of second stage without feedback is %0.3f kilo-ohm.\nOutput resistance of first stage without feedback is %0.2f kilo-ohm.\nOutput resistance of second stage without feedback is %0.2f kilo-ohm .",Av,Ri*10**-3,Ri2*10**-3,Ro1*10**-3,Ro2*10**-3)
+printf("\n Voltage gain with feedback is %0.1f .\nInput resistance with feedback is %0.2f kilo-ohm.\nOutput resistance with feedback is %0.3f kilo-ohm.",A1v,Ri1*10**-3,R1o2*10**-3)
|