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Step 8 11.011P The closed loop gain of the amplifier expression is, A 1+AB Substitute A and A, values in the expression of to calculate Feedback factor (B) 1000 10 990 10000 Thus, the required feedback factor is 0.099 Step 8 Calculate the de-sensitivity factor. D=1+AB Substitute 1000 V/V for A and 0.099 for 1+99 = 100 Therefore, the required de sensitivity factor D is 100 Step 8 From the given information: A 500 V/V and = 10 V/V Substitute A and A, values in the expression of to calculate Feedback factor (B) 10 500 490 500 Thus, the required feedback factor is 0.098 Step of 8 Calculate the de sensitivity factor. Substitute 500 V/V for A and 0. 098 for =1+49 = 50 Therefore, the required de-sensitivity factor D IS 50 Step 8 Calculate the open loop gain uncertainty for the gain uncertainty of +10% A 1000 V/V 10 dA (1000) 100 100 V The closed loop gain uncertainty for the gain uncertainty of +10 % is, dA, dA Substitute corresponding values. 100 dA, 100 10000 0.01 V/V Step 8 Calculate the maximum allowable uncertainty for closed loop gain A, = 10 V/V 100 0.01 100 (since, dA, 0.01) 1=10x I 10 =0.1 Thus, the required closed loop gain uncertainty x is 0.1% Step 8 Calculate the open loop gain uncertainty for the gain uncertainty of +10 % A 500 V/V 10 dA 500 100 50 V/V Calculate the closed loop gain uncertainty for the gain uncertainty of +10 % dA dA, 50 = 50 2500 0.02 V/V Step Calculate the maximum allowable uncertainty for closed loop gain A, = 10 V/V dA, 100 10x 0.02 100 2=10x 2 10 =0.2 Therefore, the required closed loop gain uncertainty is 0.2%