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diff --git a/863/CH7/EX7.1/Ex7_1.txt b/863/CH7/EX7.1/Ex7_1.txt
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+//Caption:Design a collector coupled monostable multivibrator by determining rc,rb,r2,r1 and vb1
+//Ex7.1
+clc;
+clear;
+close;
+vs=9//Supply voltage(in volts)
+Ic=2//Collector current(in mA)
+hfe=50
+vd=0.7//Diode forward voltage(in volts)
+vce=0.2//Saturated collector emitter voltage(in volts)
+Vbb=-9//Base voltage(in volts)
+Vbe=0.7//Base emitter voltage(in volts)
+Rc=(vs-vd-vce)/Ic
+Ib2=Ic*1000/hfe
+Rb=(vs-Vbe-vd)*1000/Ib2
+I2=Ic*1000/10
+Vr2=Vbe-Vbb
+R2=Vr2*1000/I2
+i=Ib2+I2
+r=(vs-Vbe)*1000/i
+R1=r-Rc
+Vc2=vd+vce
+Vr1=R1*(vs-Vbb)/(R1+R2)
+Vb1=Vc2-Vr1
+disp(Vb1,R1,R2,Rb,Rc,'Required components for circuit design are Rc,Rb,R2,R1(in kilo ohm) and Vb1(in volts)=')
+\ No newline at end of file