From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 68/CH5/EX5.14/ex14.sce | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100755 68/CH5/EX5.14/ex14.sce

(limited to '68/CH5/EX5.14')

diff --git a/68/CH5/EX5.14/ex14.sce b/68/CH5/EX5.14/ex14.sce
new file mode 100755
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+++ b/68/CH5/EX5.14/ex14.sce
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+// Example 5.14 : Analysis of transistor amplifier
+V_CC=10; // (V)
+R_C=3000; // (ohm)
+R_BB=100*10^3; // (ohm)
+V_BB=3; // (V)
+V_BE=0.7; // (V)
+V_T=25*10^-3; // (V)
+I_B=(V_BB-V_BE)/R_BB;
+disp(I_B,"Base current (A)")
+I_C=B*I_B;
+disp(I_C,"Collector current (A)")
+V_C=V_CC-I_C*R_C;
+disp(V_C,"Collecor voltage (V)")
+I_E=B*I_C/(B+1);
+r_e=V_T/I_E;
+disp(r_e,"r_e (ohm)")
+g_m=I_C/V_T;
+disp(g_m,"g_m (mho)")
+r_pi=B/g_m;
+disp(r_pi,"r_pi (ohm)")
+// v_i is input voltage let us assume it to be 1 V
+v_i=1;
+v_be=v_i*r_pi/(r_pi+R_BB)
+disp(v_be,"v_be")
+v_o=-g_m*R_C*v_be;
+disp(v_o,"Output voltage (V)")
+A_v=v_o/v_i;
+disp(A_v,"Voltage gain")
\ No newline at end of file
-- 
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