initial commit / add all books

36 files changed, 309 insertions, 0 deletions

diff --git a/199/CH6/EX6.1/Example_6_1.sce b/199/CH6/EX6.1/Example_6_1.sce
new file mode 100755
index 000000000..8221349a0
--- /dev/null
+++ b/199/CH6/EX6.1/Example_6_1.sce
@@ -0,0 +1,19 @@
+// Chapter6

+// Page.No-193, Figure.No-6.3(a)

+// Example_6_1

+// Bandwidth of the amplifier

+// Given

+clear;clc;

+R1=100;Rf=1*10^3;Rin=50;Rl=10*10^3;

+Ci=0.1*10^-6; // Capacitance b/w 2 stages being coupled 

+RiF=R1; // ac input resistance of the second stage

+Ro=Rin; // ac output resistance of the 1st stage

+UGB=10^6; // Unity gain bandwidth

+fl=1/(2*%pi*Ci*(RiF+Ro)); // Low-freq cutoff 

+printf("\n Low-freq cutoff is = %.1f Hz \n",fl) // Result

+K=Rf/(R1+Rf);

+Af=-Rf/R1; // closed loop voltage gain

+fh=UGB*K/abs(Af); // High-freq cutoff

+printf("\n High-freq cutoff is = %.1f Hz \n",fh) // Result

+BW=fh-fl; // Bandwidth

+printf("\n Bandwidth is = %.1f Hz \n",BW) // Result
\ No newline at end of file
diff --git a/199/CH6/EX6.1/result_ex_6_1.txt b/199/CH6/EX6.1/result_ex_6_1.txt
new file mode 100755
index 000000000..f41acb94a
--- /dev/null
+++ b/199/CH6/EX6.1/result_ex_6_1.txt
@@ -0,0 +1,3 @@
+* Low-freq cutoff is = 10610.3 Hz

+* High-freq cutoff is = 90909.1 Hz

+* Bandwidth is = 80298.8 Hz
\ No newline at end of file
diff --git a/199/CH6/EX6.10/Example_6_10.sce b/199/CH6/EX6.10/Example_6_10.sce
new file mode 100755
index 000000000..1100f8d38
--- /dev/null
+++ b/199/CH6/EX6.10/Example_6_10.sce
@@ -0,0 +1,12 @@
+// Chapter6

+// Page.No-220, Figure.No-6.17

+// Example_6_10

+// Range of input voltage

+// Given

+clear;clc;

+R1min=1*10^3;R1max=6.8*10^3;

+io=1*10^-3; // Meter current for full-wave rectification

+vin_min=1.1*R1min*io; // Minimum input voltage

+printf("\n Minimum input voltage is = %.1f V \n",vin_min)

+vin_max=1.1*R1max*io; // Maximum input voltage

+printf("\n Maximum input voltage is = %.2f V \n",vin_max)
\ No newline at end of file
diff --git a/199/CH6/EX6.10/result_ex_6_10.txt b/199/CH6/EX6.10/result_ex_6_10.txt
new file mode 100755
index 000000000..d11529ccd
--- /dev/null
+++ b/199/CH6/EX6.10/result_ex_6_10.txt
@@ -0,0 +1,2 @@
+* Minimum input voltage is = 1.1 V 

+* Maximum input voltage is = 7.48 V 
\ No newline at end of file
diff --git a/199/CH6/EX6.11/Example_6_11.sce b/199/CH6/EX6.11/Example_6_11.sce
new file mode 100755
index 000000000..a02d269f8
--- /dev/null
+++ b/199/CH6/EX6.11/Example_6_11.sce
@@ -0,0 +1,12 @@
+// Chapter6

+// Page.No-222, Figure.No-6.18

+// Example_6_11

+// Current and voltage drop

+// Given

+clear;clc;

+Vin=0.5;Vo=1.2;

+R1=100;

+Io=Vin/R1; // Current through diode

+printf("\n Current through diode is = %.4f A \n",Io)

+Vd=Vo-Vin; // Voltage drop across diode

+printf("\n Voltage drop across diode is = %.1f V \n",Vd)
\ No newline at end of file
diff --git a/199/CH6/EX6.11/result_ex_6_11.txt b/199/CH6/EX6.11/result_ex_6_11.txt
new file mode 100755
index 000000000..0fbca50a5
--- /dev/null
+++ b/199/CH6/EX6.11/result_ex_6_11.txt
@@ -0,0 +1,2 @@
+* Current through diode is = 0.0050 A

+* Voltage drop across diode is = 0.7 V
\ No newline at end of file
diff --git a/199/CH6/EX6.12.a/Example_6_12_a.sce b/199/CH6/EX6.12.a/Example_6_12_a.sce
new file mode 100755
index 000000000..4aede180b
--- /dev/null
+++ b/199/CH6/EX6.12.a/Example_6_12_a.sce
@@ -0,0 +1,10 @@
+// Chapter6

+// Page.No-222, Figure.No-6.19

+// Example_6_12_a

+// Load current

+// Given

+clear;clc;

+Vin=5;V1=1;

+R=10*10^3;

+Il=Vin/R; // Load current

+printf("\n Load current is = %.5f A \n",Il)
\ No newline at end of file
diff --git a/199/CH6/EX6.12.a/result_ex_6_12_a.txt b/199/CH6/EX6.12.a/result_ex_6_12_a.txt
new file mode 100755
index 000000000..8d8d9b58c
--- /dev/null
+++ b/199/CH6/EX6.12.a/result_ex_6_12_a.txt
@@ -0,0 +1 @@
+* Load current is = 0.00050 A
\ No newline at end of file
diff --git a/199/CH6/EX6.12.b/Example_6_12_b.sce b/199/CH6/EX6.12.b/Example_6_12_b.sce
new file mode 100755
index 000000000..87e36db45
--- /dev/null
+++ b/199/CH6/EX6.12.b/Example_6_12_b.sce
@@ -0,0 +1,10 @@
+// Chapter6

+// Page.No-222, Figure.No-6.19

+// Example_6_12_b

+// Output voltage

+// Given

+clear;clc;

+Vin=5;V1=1;

+R=10*10^3;

+Vo=2*V1; // Output voltage

+printf("\n Output voltage is = %.f V \n",Vo)
\ No newline at end of file
diff --git a/199/CH6/EX6.12.b/result_ex_6_12_b.txt b/199/CH6/EX6.12.b/result_ex_6_12_b.txt
new file mode 100755
index 000000000..b7debb26e
--- /dev/null
+++ b/199/CH6/EX6.12.b/result_ex_6_12_b.txt
@@ -0,0 +1 @@
+* Output voltage is = 2 V
\ No newline at end of file
diff --git a/199/CH6/EX6.13/Example_6_13.sce b/199/CH6/EX6.13/Example_6_13.sce
new file mode 100755
index 000000000..45ca1bd59
--- /dev/null
+++ b/199/CH6/EX6.13/Example_6_13.sce
@@ -0,0 +1,14 @@
+// Chapter6

+// Page.No-222, Figure.No-6.20

+// Example_6_13

+// Range of output voltage

+// Given

+clear;clc;

+R1=1*10^3;Rf=2.7*10^3;

+Vref=2;

+Io=0; // Since all the binary inputs D0 to D7 are logic zero

+Vo_min=Io*Rf; // Minimum output voltage

+printf("\n Minimum output voltage is = %.f V \n",Vo_min)

+Io=(Vref/R1)*(1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256);

+Vo_max=Io*Rf; // Maximum output voltage

+printf("\n Maximum output voltage is = %.2f V \n",Vo_max)
\ No newline at end of file
diff --git a/199/CH6/EX6.13/result_ex_6_13.txt b/199/CH6/EX6.13/result_ex_6_13.txt
new file mode 100755
index 000000000..507e93367
--- /dev/null
+++ b/199/CH6/EX6.13/result_ex_6_13.txt
@@ -0,0 +1,2 @@
+* Minimum output voltage is = 0 V 

+* Maximum output voltage is = 5.38 V
\ No newline at end of file
diff --git a/199/CH6/EX6.14/Example_6_14.sce b/199/CH6/EX6.14/Example_6_14.sce
new file mode 100755
index 000000000..8f4def15c
--- /dev/null
+++ b/199/CH6/EX6.14/Example_6_14.sce
@@ -0,0 +1,14 @@
+// Chapter6

+// Page.No-228, Figure.No-6.21

+// Example_6_14

+// Change in output voltage

+// Given

+clear;clc;

+Rf=3*10^3;

+Vdc=5;

+Rt=100*10^3; // Resistance at darkness

+Vomin=-(Vdc/Rt)*Rf; // Min output voltage at darkness

+printf("\n Min output voltage at darkness is = %.2f V \n",Vomin)

+Rt=1.5*10^3; // Resistance at Illumination

+Vomax=-(Vdc/Rt)*Rf; // Max output voltage at Illumination

+printf("\n Max output voltage at Illumination is = %.f V \n",Vomax)
\ No newline at end of file
diff --git a/199/CH6/EX6.14/result_ex_6_14.txt b/199/CH6/EX6.14/result_ex_6_14.txt
new file mode 100755
index 000000000..089a0a80b
--- /dev/null
+++ b/199/CH6/EX6.14/result_ex_6_14.txt
@@ -0,0 +1,2 @@
+* Min output voltage at darkness is = -0.15 V

+* Max output voltage at Illumination is = -10 V
\ No newline at end of file
diff --git a/199/CH6/EX6.15/Example_6_15.sce b/199/CH6/EX6.15/Example_6_15.sce
new file mode 100755
index 000000000..07ccbb059
--- /dev/null
+++ b/199/CH6/EX6.15/Example_6_15.sce
@@ -0,0 +1,23 @@
+// Chapter6

+// Page.No-230, Figure.No-6.23

+// Example_6_15

+// Output voltage of an integrator

+// Given 

+clear;clc;

+Vin=2; // Input voltage in volt

+Vo0=0;

+Vo1=-integrate('2','t',0,1);

+disp(Vo1)

+Vo2=-integrate('2','t',1,2)+Vo1;

+disp(Vo2)

+Vo3=-integrate('2','t',2,3)+Vo2;

+disp(Vo3)

+Vo4=-integrate('2','t',3,4)+Vo3;

+disp(Vo4)

+Vo=[Vo0 Vo1 Vo2 Vo3 Vo4];

+t=[0 1 2 3 4];

+plot(t,Vo);

+title('Output Voltage');

+xlabel('t');

+ylabel('Vo');

+

diff --git a/199/CH6/EX6.16.a/Example_6_16_a.sce b/199/CH6/EX6.16.a/Example_6_16_a.sce
new file mode 100755
index 000000000..e56107384
--- /dev/null
+++ b/199/CH6/EX6.16.a/Example_6_16_a.sce
@@ -0,0 +1,18 @@
+// Chapter6

+// Page.No-238

+// Example_6_16_a

+// Design of differentiator

+// Given

+clear;clc;

+C1=0.1*10^-6; // Assume

+fa=1*10^3; // Freq at which gain is 0 dB

+Rf=1/(2*%pi*fa*C1); // Using fa=1/(2*%pi*Rf*C1)

+printf("\n Feedback resistance is = %.1f ohm \n",Rf)

+Rf=1.5*10^3; // Approximation

+fb=20*10^3; // Gain limiting freq

+R1=1/(2*%pi*fb*C1);

+printf("\n Resistance,R1 is = %.1f ohm \n",R1)

+R1=82; // Approximation

+Cf=R1*C1/Rf;

+printf("\n Capacitance,Cf is = %.10f farad \n",Cf)

+Cf=0.005*10^-6; // Approximation
\ No newline at end of file
diff --git a/199/CH6/EX6.16.a/result_ex_6_16_a.txt b/199/CH6/EX6.16.a/result_ex_6_16_a.txt
new file mode 100755
index 000000000..c457ad4b4
--- /dev/null
+++ b/199/CH6/EX6.16.a/result_ex_6_16_a.txt
@@ -0,0 +1,3 @@
+* Feedback resistance is = 1591.5 ohm

+* Resistance,R1 is = 79.6 ohm 

+* Capacitance,Cf is = 0.0000000055 farad
\ No newline at end of file
diff --git a/199/CH6/EX6.16.b/Example_6_16_b.sce b/199/CH6/EX6.16.b/Example_6_16_b.sce
new file mode 100755
index 000000000..116911e23
--- /dev/null
+++ b/199/CH6/EX6.16.b/Example_6_16_b.sce
@@ -0,0 +1,14 @@
+// Chapter6

+// Page.No-238

+// Example_6_16_b

+// Output waveform of differentiator

+// Given

+clear;clc;

+step=0.01;

+t=0:step:2*%pi;

+dy=diff(sin(t))/step; //approximate differentiation of sine function

+Vo=-1.5*10^3*0.1*10^-6*2*%pi*10^3*dy;

+plot(Vo);

+title('Output Voltage');

+xlabel('t');

+ylabel('Vo'); 

diff --git a/199/CH6/EX6.2.a/Example_6_2_a.sce b/199/CH6/EX6.2.a/Example_6_2_a.sce
new file mode 100755
index 000000000..a7d14d581
--- /dev/null
+++ b/199/CH6/EX6.2.a/Example_6_2_a.sce
@@ -0,0 +1,20 @@
+// Chapter6

+// Page.No-193, Figure.No-6.4(c)

+// Example_6_2_a

+// Bandwidth of the amplifier

+// Given

+clear;clc;

+R1=100*10^3;R2=100*10^3;R3=100*10^3;Rf=1*10^6;Rin=50;

+Ci=0.1*10^-6; // Capacitance b/w 2 stages being coupled

+Ro=Rin; // ac output resistance of the 1st stage

+Vcc=15;

+UGB=10^6; // Unity gain bandwidth

+Rif=R2*R3/(R2+R3);  // since Ri*(1+A*B)>>R2 or R3

+fl=1/(2*%pi*Ci*(Rif+Ro)); // low-freq cutoff 

+printf("\n Low-freq cutoff is = %.1f Hz \n",fl) // Result

+K=Rf/(R1+Rf);

+Af=-Rf/R1; // closed loop voltage gain

+fh=UGB*K/abs(Af); // High-freq cutoff

+printf("\n High-freq cutoff is = %.1f Hz \n",fh) // Result

+BW=fh-fl; // Bandwidth

+printf("\n Bandwidth is = %.1f Hz \n",BW) // Result
\ No newline at end of file
diff --git a/199/CH6/EX6.2.a/result_ex_6_2_a.txt b/199/CH6/EX6.2.a/result_ex_6_2_a.txt
new file mode 100755
index 000000000..d07f481e6
--- /dev/null
+++ b/199/CH6/EX6.2.a/result_ex_6_2_a.txt
@@ -0,0 +1,3 @@
+* Low-freq cutoff is = 31.8 Hz 

+* High-freq cutoff is = 90909.1 Hz

+* Bandwidth is = 90877.3 Hz 

diff --git a/199/CH6/EX6.2.b/Example_6_2_b.sce b/199/CH6/EX6.2.b/Example_6_2_b.sce
new file mode 100755
index 000000000..c3d5e36ac
--- /dev/null
+++ b/199/CH6/EX6.2.b/Example_6_2_b.sce
@@ -0,0 +1,12 @@
+// Chapter6

+// Page.No-193, Figure.No-6.4(c)

+// Example_6_2_b

+// Max output voltage swing

+// Given

+clear;clc;

+R1=100*10^3;R2=100*10^3;R3=100*10^3;Rf=1*10^6;Rin=50;

+Ci=0.1*10^-6; // Capacitance b/w 2 stages being coupled

+Ro=Rin; // ac output resistance of the 1st stage

+UGB=10^6; // Unity gain bandwidth

+Vcc=15;

+printf("\n The ideal maximum output voltage swing is = %.f V pp \n",Vcc)
\ No newline at end of file
diff --git a/199/CH6/EX6.2.b/result_ex_6_2_b.txt b/199/CH6/EX6.2.b/result_ex_6_2_b.txt
new file mode 100755
index 000000000..34ff2d57f
--- /dev/null
+++ b/199/CH6/EX6.2.b/result_ex_6_2_b.txt
@@ -0,0 +1 @@
+* The ideal maximum output voltage swing is = 15 V pp
\ No newline at end of file
diff --git a/199/CH6/EX6.3/Example_6_3.sce b/199/CH6/EX6.3/Example_6_3.sce
new file mode 100755
index 000000000..2014dbb4f
--- /dev/null
+++ b/199/CH6/EX6.3/Example_6_3.sce
@@ -0,0 +1,21 @@
+// Chapter6

+// Page.No-193, Figure.No-6.5(a)

+// Example_6_3

+// Components of peak amplifier

+// Given

+clear;clc;

+fp=16*10^3; // Peak frequency

+Af=10; // Gain at peak frequency

+C=0.01*10^-6; // Assume

+L=1/(((2*%pi*fp)^2)*10^-8); // Simplifying fp=1/(2*pi*sqrt(L*C))

+printf("\n Inductance is = %.4f H \n",L)

+L=10*10^-3; // Approximate

+R=30; // Assume the value of internal resistance of the inductor

+Xl=2*%pi*fp*L; // Inductive reactance

+Qcoil=Xl/R; // Figure of merit of the coil

+printf("\n Figure of merit of the coil is = %.1f \n",Qcoil)

+Rp=(Qcoil)^2*R; // Parallel resistance of the tank circuit

+printf("\n Parallel resistance of the tank circuit is = %.1f ohm \n",Rp)

+R1=100; // Assume the value of internal resisrance of the coil

+Rf=-Rp/(1-(Rp/(Af*R1))); // Simplifying Af=(Rf||Rp)/R1

+printf("\n Feedback resistance is = %.1f ohm \n",Rf)
\ No newline at end of file
diff --git a/199/CH6/EX6.3/result_ex_6_3.txt b/199/CH6/EX6.3/result_ex_6_3.txt
new file mode 100755
index 000000000..835e62a44
--- /dev/null
+++ b/199/CH6/EX6.3/result_ex_6_3.txt
@@ -0,0 +1,4 @@
+* Inductance is = 0.0099 H 

+* Figure of merit of the coil is = 33.5 

+* Parallel resistance of the tank circuit is = 33688.2 ohm

+* Feedback resistance is = 1030.6 ohm 

diff --git a/199/CH6/EX6.4/Example_6_4.sce b/199/CH6/EX6.4/Example_6_4.sce
new file mode 100755
index 000000000..7a0a430a1
--- /dev/null
+++ b/199/CH6/EX6.4/Example_6_4.sce
@@ -0,0 +1,10 @@
+// Chapter6

+// Page.No-200, Figure.No-6.6

+// Example_6_4

+// Output voltage

+// Given

+clear;clc;

+Va=1;Vb=2;Vc=3; // Input voltages in volts

+Ra=3*10^3;Rb=3*10^3;Rc=3*10^3;Rf=1*10^3;

+Vo=-((Rf/Ra)*Va+(Rf/Rb)*Vb+(Rf/Rc)*Vc); // Output voltage

+printf("\n Output voltage is = %.f V \n",Vo)
\ No newline at end of file
diff --git a/199/CH6/EX6.4/result_ex_6_4.txt b/199/CH6/EX6.4/result_ex_6_4.txt
new file mode 100755
index 000000000..5885fafa6
--- /dev/null
+++ b/199/CH6/EX6.4/result_ex_6_4.txt
@@ -0,0 +1 @@
+* Output voltage is = -2 V 
\ No newline at end of file
diff --git a/199/CH6/EX6.5/Example_6_5.sce b/199/CH6/EX6.5/Example_6_5.sce
new file mode 100755
index 000000000..004322ea7
--- /dev/null
+++ b/199/CH6/EX6.5/Example_6_5.sce
@@ -0,0 +1,12 @@
+// Chapter6

+// Page.No-203, Figure.No-6.7

+// Example_6_5

+// Output voltage

+// Given

+clear;clc;

+Va=2;Vb=-3;Vc=4; // Input voltages in volts

+R1=1*10^3;Rf=2*10^3;

+V1=(Va+Vb+Vc)/3; // Voltage at non-inverting terminal

+printf("\n Voltage at non-inverting terminal is = %.f V \n",V1)

+Vo=(1+Rf/R1)*V1; // Output voltage

+printf("\n Output voltage is = %.f V \n",Vo)
\ No newline at end of file
diff --git a/199/CH6/EX6.5/result_ex_6_5.txt b/199/CH6/EX6.5/result_ex_6_5.txt
new file mode 100755
index 000000000..e1587834e
--- /dev/null
+++ b/199/CH6/EX6.5/result_ex_6_5.txt
@@ -0,0 +1,2 @@
+* Voltage at non-inverting terminal is = 1 V 

+* Output voltage is = 3 V
\ No newline at end of file
diff --git a/199/CH6/EX6.6/Example_6_6.sce b/199/CH6/EX6.6/Example_6_6.sce
new file mode 100755
index 000000000..583761f25
--- /dev/null
+++ b/199/CH6/EX6.6/Example_6_6.sce
@@ -0,0 +1,10 @@
+// Chapter6

+// Page.No-205, Figure.No-6.9

+// Example_6_6

+// Output voltage

+// Given

+clear;clc;

+Va=2;Vb=3;Vc=4;Vd=5; // Input voltages in volts

+R=1*10^3;

+Vo=-Va-Vb+Vc+Vd; // Output voltage

+printf("\n Output voltage is = %.f V \n",Vo)
\ No newline at end of file
diff --git a/199/CH6/EX6.6/result_ex_6_6.txt b/199/CH6/EX6.6/result_ex_6_6.txt
new file mode 100755
index 000000000..992e256e2
--- /dev/null
+++ b/199/CH6/EX6.6/result_ex_6_6.txt
@@ -0,0 +1 @@
+* Output voltage is = 4 V 
\ No newline at end of file
diff --git a/199/CH6/EX6.7/Example_6_7.sce b/199/CH6/EX6.7/Example_6_7.sce
new file mode 100755
index 000000000..2de0037f6
--- /dev/null
+++ b/199/CH6/EX6.7/Example_6_7.sce
@@ -0,0 +1,21 @@
+// Chapter6

+// Page.No-209, Figure.No-6.12

+// Example_6_7

+// Output voltage

+// Given

+clear;clc;

+R1=1*10^3;Rf=4.7*10^3;Ra=100*10^3;Rb=100*10^3;Rc=100*10^3;

+Vdc=5;

+Rt=100*10^3; // Resistance of a thermistor

+temp_coeff=1*10^3;

+

+// Output voltage at 0 degree

+delta_R=-temp_coeff*(0-25); // Change in resistance

+R=Ra; // Ra=Rb=Rc=R

+Vo=((Rf*delta_R)/(R1*4*R))*Vdc;

+printf("\n Output voltage at 0 degree is = %.2f V \n",Vo)

+

+// Output voltage at 100 degree

+delta_R=-temp_coeff*(100-25); // Change in resistance

+Vo=((Rf*delta_R)/(R1*4*R))*Vdc;

+printf("\n Output voltage at 100 degree is = %.2f V \n",Vo)
\ No newline at end of file
diff --git a/199/CH6/EX6.7/result_ex_6_7.txt b/199/CH6/EX6.7/result_ex_6_7.txt
new file mode 100755
index 000000000..7f5f4d155
--- /dev/null
+++ b/199/CH6/EX6.7/result_ex_6_7.txt
@@ -0,0 +1,2 @@
+* Output voltage at 0 degree is = 1.47 V 

+* Output voltage at 100 degree is = -4.41 V
\ No newline at end of file
diff --git a/199/CH6/EX6.8/Example_6_8.sce b/199/CH6/EX6.8/Example_6_8.sce
new file mode 100755
index 000000000..6a435025c
--- /dev/null
+++ b/199/CH6/EX6.8/Example_6_8.sce
@@ -0,0 +1,12 @@
+// Chapter6

+// Page.No-209, Figure.No-6.12

+// Example_6_7

+// Change in resistance in straingage

+// Given

+clear;clc;

+A=-100; // Gain of the differential instrumentation amplifier

+Ra=100;Rb=100;Rc=100;

+Vdc=10;Vo=1;

+R=Ra; // Ra=Rb=Rc=R

+delta_R=(Vo*R)/(Vdc*abs(A)); // Change in resistance

+printf("\n Change in resistance is = %.1f ohm \n",delta_R)
\ No newline at end of file
diff --git a/199/CH6/EX6.8/result_ex_6_8.txt b/199/CH6/EX6.8/result_ex_6_8.txt
new file mode 100755
index 000000000..5ecb627b6
--- /dev/null
+++ b/199/CH6/EX6.8/result_ex_6_8.txt
@@ -0,0 +1 @@
+* Change in resistance is = 0.1 V
\ No newline at end of file
diff --git a/199/CH6/EX6.9/Example_6_9.sce b/199/CH6/EX6.9/Example_6_9.sce
new file mode 100755
index 000000000..692050eaf
--- /dev/null
+++ b/199/CH6/EX6.9/Example_6_9.sce
@@ -0,0 +1,12 @@
+// Chapter6

+// Page.No-216, Figure.No-6.14(a)

+// Example_6_9

+// Gain of the amplifier

+// Given

+clear;clc;

+Vo=3.7;Vin=100*10^-3;

+R1=100; // Assume

+Rf=0.5*((Vo*R1)/Vin-1); // Feedback resisrance

+printf("\n Feedback resisrance is = %.1f ohm \n",Rf)

+A=(1+2*Rf/R1); // Gain of the differential amplifier

+printf("\n Gain of the differential amplifier is = %.1f \n",A)
\ No newline at end of file
diff --git a/199/CH6/EX6.9/result_ex_6_9.txt b/199/CH6/EX6.9/result_ex_6_9.txt
new file mode 100755
index 000000000..4cf485d85
--- /dev/null
+++ b/199/CH6/EX6.9/result_ex_6_9.txt
@@ -0,0 +1,2 @@
+* Feedback resisrance is = 1849.5 ohm

+* Gain of the differential amplifier is = 38.0
\ No newline at end of file