From 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 Mon Sep 17 00:00:00 2001
From: prashantsinalkar
Date: Tue, 10 Oct 2017 12:27:19 +0530
Subject: initial commit / add all books

---
 3754/CH24/EX24.9/24_9.sce | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 3754/CH24/EX24.9/24_9.sce

(limited to '3754/CH24/EX24.9/24_9.sce')

diff --git a/3754/CH24/EX24.9/24_9.sce b/3754/CH24/EX24.9/24_9.sce
new file mode 100644
index 000000000..adb6c6446
--- /dev/null
+++ b/3754/CH24/EX24.9/24_9.sce
@@ -0,0 +1,30 @@
+clear//
+
+//Variables
+
+VCC = 20.0                            //Source voltage (in volts)
+RC = 5.7                              //Collector resistance (in kilo-ohm)
+RE = 1.0                              //Emitter resistance (in kilo-ohm)
+beta = 100.0                          //Common emitter current gain
+VBE = 0.7                             //Emitter-to-Base Voltage (in volts)
+R1 = 100.0                            //Resistance (in kilo-ohm)   
+R2 = 10.0                             //Resistance (in kilo-ohm)
+Vs = 10.0 * 10**-3                    //a.c voltage (in volts)
+RS = 100.0 * 10**-3                   //Source resistance (in kilo-ohm)  
+
+//Calculation
+
+Vth = VCC * R2 /(R1 + R2)             //Thevenin's voltage (in volts)
+Rth = R1 * R2 / (R1 + R2)             //Thevenin's equivalent resistance (in kilo-ohm)
+IE = (Vth - VBE)/(RE + Rth/beta)      //Emitter current (in milli-Ampere)
+r1e = 25.0 / IE * 10**-3              //a.c. resistance of emitter diode (in kilo-hm)
+Ris = Rth * beta*r1e/(Rth + beta*r1e) //input resistance of the stage (in ohm)
+rL = RC                               //Load resistance (in kilo-ohm)
+Av = rL / r1e                         //Voltage gain 
+vin = Vs * Ris / (Ris + RS)           //input voltage (in milli-volts)    
+vo = Av * vin                         //Output voltage (in milli-volts)
+Avs = Av * vin / Vs                   //Overall voltage gain 
+
+//Result
+
+printf("\n Av is  %0.3f .\nRi is  %0.2f  ohm.\nVo is  %0.2f  V.\nAvs is  %0.2f .",Av,Ris*10**3,vo,Avs)
-- 
cgit