1 files changed, 40 insertions, 0 deletions
diff --git a/2882/CH9/EX9.11/Ex9_11.sce b/2882/CH9/EX9.11/Ex9_11.sce
new file mode 100755
index 000000000..14b220358
--- /dev/null
+++ b/2882/CH9/EX9.11/Ex9_11.sce
@@ -0,0 +1,40 @@
+//Tested on Windows 7 Ultimate 32-bit
+//Chapter 9 Frequency Response of Amplifier Pg no. 314 and 315
+clear;
+clc;
+
+//Given
+
+VCC=12;//collector supply voltage in volts
+RC=2.7D3;//collector resistance in ohms
+RE=560;//emitter resistance in ohms
+R1=15D3;//divider network resistance R1 in ohms
+R2=5.6D3;//divider network resistance R2 in ohms
+VBE=0.7;//forward voltage drop of emitter diode in volts
+VT=25D-3;//voltage equivalent of temperature in volts
+B=100;//DC CE current gain bet
+Rs=600;//source internal impedance in ohms
+RL=2.7D3;//load resistance in ohms
+Cbe=15D-12;//base to emitter capacitance in farads
+Cbc=2D-12;//base to collector capacitance in farads
+Cwo=1D-12;//output wiring capacitance in farads
+f=[1.19D6 2.38D6 4.76D6];//frequency values in hertz
+
+//Solution
+
+VB=VCC*R2/(R1+R2);//base to ground voltage in volts
+VE=VB-VBE;//emitter to ground voltage in volts
+IE=VE/RE;//emitter current in amperes
+re=VT/IE;//a.c. emitter resistance in ohms
+RTH=1/(1/Rs+1/R1+1/R2+1/B/re);//thevenised input resistance in ohms
+Gv_mid=RC*RL/(RC+RL)/re;//midrange gain of amplifier
+Cout_miller=Cbc*(1+Gv_mid)/Gv_mid;//output miller capacitance in farads
+Cout_dash=Cout_miller+Cwo;//total output capacitance in farads
+RL_dash=RL*RC/(RL+RC);//total output resistance in ohms
+printf("The high frequency input R-C network consists of\n ");
+printf("R = %.2f kilo-ohms\n ",RL_dash/10^3);
+printf("C = %.f pF\n\n ",Cout_dash*10^12);
+
+fc=1/2/%pi/RL_dash/Cout_dash;//critical frequency in hertz
+printf("fc = %.1f MHz",fc/10^6);
+