For the difference amplifier as shown in the figure show that if each – McqOptions

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1.	For the difference amplifier as shown in the figure show that if each resistor has a tolerance of ±100 ε % (i.e., for, say, a 5% resistor, ε = 0.05) then the worst-case CMRR is given approximately by (given K = R2/R1 = R4/R3)
A.	20 log [K+1/4ε].
B.	20 log [K+1/2ε].
C.	20 log [K+1/ε].
D.	20 log [2K+2/ε].
Answer» B.

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