disp('chapter 3 ex3.10')
disp('given')
disp('The difference of two input signals is to be ampliflied by factor of 37')
Av=37
disp('amplitude=50mV')
disp('R2=1Mohms')
R2=1*10^(6)
disp('R1=R2/Av')
R1=R2/Av
disp('ohms',R1)
disp('R3=R1=27kohms')
disp('R4=R2=1Mohms')
R3=27000
R4=1*10^(6)
disp('differential mode input resistance Ridiff=R1+(R3+R4)')
Ridiff=R1+(R3+R4)
disp('ohms',Ridiff)
disp('commom mode input resistance Ricm=R1||(R3+R4)')
Ricm=R1*(R3+R4)/(R1+R3+R4)
disp('ohms',Ricm)