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diff --git a/281/CH8/EX8.3/example8_3.sce b/281/CH8/EX8.3/example8_3.sce
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+disp('chapter 8 ex8.3')
+disp('given')
+disp('Design an integrating circuit to produce a triangular output wave form')
+disp('peak to peak amplitude of v=4volt') //(using a BIFET op-amp)
+v=4
+disp('The input voltage Vi=+or-5volt square wave with frequency of 500Hz')
+Vi=5
+f=500
+disp('C1>stray capacitance')
+disp('let C1=.1*10^(-6)F')    //(standard value)
+C1=.1*10^(-6)
+disp('t=T/2=1/(2*f)')
+t=1/(2*f)
+disp('seconds',t)
+disp('I1=C1*v/t')
+I1=C1*v/t
+disp('Amperes',I1)
+disp('R1=Vi/I1')
+R1=Vi/I1
+disp('ohms',R1)       //(use a 12kohm standard value with a 470ohm connected in series)
+disp('R2=20*R1')
+R2=20*R1
+disp('ohms',R2)                //(use a 270kohm standard value)
+disp('R3=R1=12.5kohm')   //(use a 12kohm standard value)
+\ No newline at end of file