initial commit / add all books

2 files changed, 41 insertions, 0 deletions

diff --git a/317/CH12/EX12.4/example4.sce b/317/CH12/EX12.4/example4.sce
new file mode 100755
index 000000000..dcb2c0567
--- /dev/null
+++ b/317/CH12/EX12.4/example4.sce
@@ -0,0 +1,39 @@
+// calculate transistor power dissipation and efficiency  
+// Electronic Principles
+// By Albert Malvino , David Bates
+// Seventh Edition
+// The McGraw-Hill Companies
+// Example 12-4, page 387
+
+clear;clc; close;
+// Given data
+R1=490;// in ohms
+R2=68;// in ohms
+Rc=120;// in ohms
+Re=20;// in ohms
+Vcc=30;// in volts
+Rl=180;// in ohms
+Ri=100;// input independence in ohms
+PP=18;// peak-to-peak voltage in volts
+Vin=200*10^-3;// in volts
+Vc=12;// in volts
+
+// Calculations
+Vb=R2*Vcc/(R2+R1);// in volts
+Ve=Vb-0.7;
+Ie=Ve/Re;// in amperes
+Icq=Ie;// dc collector current in amperes
+Vceq=Vc-Ve;// dc collector-emitter voltage in volts
+Pdq=Vceq*Icq;// transistor power dissipation
+// to find stage efficiency
+Ibias=Vcc/(R1+R2);// in amperes
+Idc=Ibias+Icq;// in amperes
+Pdc=Idc*Vcc;// dc input power in watts
+Pout=(PP)^2/(8*Rl);// ac output power in watts
+n=(Pout/Pdc)*100;// efficiency
+disp("Watts",Pdq,"transistor power dissipation=")
+disp("%",n,"efficiency=")
+
+// Results
+// transistor power dissipation is 1.34 watts  
+// efficiency of stage is 3.72%
diff --git a/317/CH12/EX12.4/example4.txt b/317/CH12/EX12.4/example4.txt
new file mode 100755
index 000000000..30c81644b
--- /dev/null
+++ b/317/CH12/EX12.4/example4.txt
@@ -0,0 +1,2 @@
+transistor power dissipation is 1.34 watts  
+efficiency of stage is 3.72%