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Step of 8 11.001E The non-inverting op-amp circuit is + A RL R₂ Step of 8 c) The closed loop gain is: A, = 10 V/V The open loop gain of the amplifier is: A = 100 The closed loop gain is given by, A, A 100 10 The feedback factor is, 90 1000 0.09 Step of 8 Hence, we have 0.09 10.1 Therefore, the ratio of the non-inverting op-amp is Step of 8 d) The amount of feedback is, A A, 100 = 10 The amount of feedback in decibels is, =20 Therefore, the amount of feedback in decibels is 20 dB Step of 8 e) The relation of the output voltage with the input voltage is given by = 10x1 V Thus the output voltage of the amplifier is Step of 8 The feed forward voltage is given by =0.09x10 =0.9 V Thus, the feed forward voltage of the amplifier is Step of 8 The input voltage is given by A 10 = 100 =0.1 V Thus the input voltage of the amplifier is Step of 8 (f) If decreases by 20%, thus we have, A = 80 V/V The value of A, becomes A A, 80 = = 9.756 V/V The percentage decrease in A, is, 10-9.756 A, = 10 0.244 10 2.44% Therefore, the percentage decrease in A, is: 2.44%