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

---
 181/CH7/EX7.31/example7_31.sce | 32 ++++++++++++++++++++++++++++++++
 181/CH7/EX7.31/example7_31.txt |  7 +++++++
 2 files changed, 39 insertions(+)
 create mode 100755 181/CH7/EX7.31/example7_31.sce
 create mode 100755 181/CH7/EX7.31/example7_31.txt

(limited to '181/CH7/EX7.31')

diff --git a/181/CH7/EX7.31/example7_31.sce b/181/CH7/EX7.31/example7_31.sce
new file mode 100755
index 000000000..a2ca55a6c
--- /dev/null
+++ b/181/CH7/EX7.31/example7_31.sce
@@ -0,0 +1,32 @@
+// Calculate Vgsq,gm,Rs,Vdsq,Rl
+// Basic Electronics
+// By Debashis De
+// First Edition, 2010
+// Dorling Kindersley Pvt. Ltd. India
+// Example 7-31 in page 335
+
+clear; clc; close;
+
+// Given data
+Vp=-4; // Pinch off voltage in V
+Idss=1.65*10^-3; // Drain-source current in mA
+Idq=0.8*10^-3; // Desired operating point of current in mA
+Av=10; // Voltage gain in dB
+
+// Calculation
+printf("We know that Id = Idss*(1-(Vgs/Vp))^2\n");
+Vgs=4*(sqrt(0.485)-1);
+gmo=(-2*Idss)/Vp;
+gm=gmo*(1-(Vgs/Vp));
+Rs=Vgs/-Idq;
+Rl=Av/gm;
+Vds=24-(Idq*Rl)-(Idq*Rs);
+printf("(a)Vgsq = %0.3f V\n(b)gm = %0.3e A/V\n(c)Rs = %0.3e ohms\n(d)Rl = %0.2e ohms\n(e)Vds = %0.3f V\n",Vgs,gm,Rs,Rl,Vds);
+printf("Therefore,\n(e)Vdsq = 16.48 V");
+
+// Result
+// (a) Vgsq = -1.214 V
+// (b) gm = 0.575 mA/V
+// (c) Rs = 1.518 K-ohm
+// (d) Rl = 17.4 K-ohm
+// (e) Vdsq = 16.48 V
\ No newline at end of file
diff --git a/181/CH7/EX7.31/example7_31.txt b/181/CH7/EX7.31/example7_31.txt
new file mode 100755
index 000000000..964e16608
--- /dev/null
+++ b/181/CH7/EX7.31/example7_31.txt
@@ -0,0 +1,7 @@
+(a)Vgsq = -1.216 V
+(b)gm = 5.742e-004 A/V
+(c)Rs = 1.520e+003 ohms
+(d)Rl = 1.74e+004 ohms
+(e)Vds = 8.852 V
+Therefore,
+(e)Vdsq = 16.48 V 
\ No newline at end of file
-- 
cgit