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diff --git a/863/CH7/EX7.3/Ex7_3.txt b/863/CH7/EX7.3/Ex7_3.txt
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+//Caption:Design a monostable multivibrator using op amp 741
+//Ex7.3
+clc;
+clear;
+close;
+Vcc=15//Collector voltage(in volts)
+Vt=1.5//Trigger voltage(in volts)
+t=200//Output pulse width(in micro sec)
+Ib=500//Base current(in nA)
+Vr2=1//R2 Resistor voltage(in volts)
+I2=0.1*Ib
+R2=Vr2*1000/I2
+i2=Vr2*1000/R2
+Vr1=Vcc-Vr2
+R1=Vr1*1000/i2
+R3=(R1*R2)/(R1+R2)
+E=Vr2-(Vcc-1)
+ec=Vcc-1
+Ec=Vr2+(Vcc-1)
+Rc=R1*R2/(R1+R2)
+C=t*1000/(Rc*log((Vcc-E)/(Vcc-ec)))
+disp(C,R3,R2,R1,'Circuit components are resistances R1,R2,R3(in kilo ohm) and Capacitance(in pF)=')
+\ No newline at end of file