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

---
 2459/CH13/EX13.14/Ex13_14.sce | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 2459/CH13/EX13.14/Ex13_14.sce

(limited to '2459/CH13/EX13.14/Ex13_14.sce')

diff --git a/2459/CH13/EX13.14/Ex13_14.sce b/2459/CH13/EX13.14/Ex13_14.sce
new file mode 100644
index 000000000..b6e2a0064
--- /dev/null
+++ b/2459/CH13/EX13.14/Ex13_14.sce
@@ -0,0 +1,21 @@
+//chapter13
+//example13.14
+//page288
+
+R1=45 // kilo ohm
+R2=15 // kilo ohm
+Re=7.5 // kilo ohm
+Vcc=30 // V
+Vbe=0.7 // V
+gain_beta=200
+
+V2=Vcc*R2/(R1+R2) // voltage across R2
+Ve=V2-Vbe // voltage across Re
+Ie=Ve/Re
+re_dash=1d-3*25/Ie // in kilo ohm
+Zin_base=gain_beta*re_dash
+Zin=Zin_base*(R1*R2/(R1+R2))/(Zin_base+R1*R2/(R1+R2))
+
+printf("input impedence of amplifier circuit = %.3f kilo ohm \n",Zin)
+
+// the accurate answer for input impedence is 3.701 kilo ohm but in book it is given as 3.45 kilo ohm
-- 
cgit