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If the value of Common Mode Rejection Ratio and Common Mode Gain are 40db and -0.12 respectively, then determine the value of differential mode gain

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in Linear Integrated Circuits by (38.2k points)
If the value of Common Mode Rejection Ratio and Common Mode Gain are 40db and -0.12 respectively, then determine the value of differential mode gain

(a) 0.036

(b) -1.2

(c) 4.8

(d) 12

The question was asked by my school teacher while I was bunking the class.

My doubt is from Operational Amplifier Internal Circuit topic in portion Operational Amplifier of Linear Integrated Circuits

1 Answer

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by (39.8k points)
The correct answer is (d) 12

Get the lowdown with: Common mode rejection ratio, CMRR =log^-1×(40/20) = 100

⇒ CMRR =(∣ADM∣/ ∣ACM∣)

⇒ ∣ADM∣ =100×0.12 = 12.

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