Design a difference amplifier with a single op-amp with: Ad = 10 V/V Acm = 0 Rid

Question

                    Design a difference amplifier with a single op-amp with:                 

                    Ad = 10 V/V                 

                    Acm = 0                 

                    Rid = 2kohms                 

                    How will you determine Ad = 0?                 

                    How will you determine Acm = 0?                 

                    Replace R2 with a resistor that is 10% smaller. How do Ad and Acm change?
                    Will the op-amp output any voltage value?                 

Explanation / Answer

R2/R1 = Ad

Rid = 2*R1 = 2k ohm

R1 = 1k ohm

R2/R2 = 10

=> R2 = 10k ohm

now , R2 = 10 k - .1*10k ohm

R2 = 9k ohm

R1 = 1k ohm

Ad' = 9 = R2'/R1

Acm = 0

Yes op-amp will output the voltage

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