//chapter-2,Example2_6,pg 484

a=0.9//parameter of diff. amplr.

b=1.1//parameter of diff. amplr.

CMRR=0.5*(((1+a)*b+(1+b)*a))/((1+a)*b-(1+b)*a)//common mode rejection ratio

printf("CMRR=%.2f \n",CMRR)