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+//Example 4.2 // Determine the differece voltage and open loop gain of an op-amp

+clc ;

+clear ;

+close ;

+V1 = -5 ; // volt  // input voltage

+V2 = 5 ; // volt

+Vo = 20 ; //volt  // output voltage

+

+// the difference voltage is given by 

+ Vd = V2-V1 ;

+disp('  The difference voltage is = '+string(Vd)+' V ');

+

+// open loop gain 

+A = (Vo/Vd);

+disp('  The open loop gain is = '+string(A)+'  ');