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diff --git a/74/CH12/EX12.3/example3_sce.sce b/74/CH12/EX12.3/example3_sce.sce
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+// chapter 12
+// example 12.3
+// page 414
+n=8;// 8 bit DAC
+R=20*10^-3;//resolution V/LSB
+inpt=10000000;
+Vofs=R*(2^n-1);
+disp(Vofs)
+D=1*2^7+0*2^6+0*2^5+0*2^4+0*2^3+0*2^2+0*2^1+0*2^0;
+disp(D)
+Vout=R*D;//output voltage
+disp(Vout)
+\ No newline at end of file