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Chegg Solutions for Microelectronic Circuits (Adel S Sedra, Kenneth C Smith) (Z-Library)_parte_1297

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Step 11.048P (a) Refer to the Figure P11 48 (a) and Figure P11 48 (b) in the The feedback factor is, Substitute for V. in equation. 1 1 Therefore, the feedback factor is R, Step 7 The closed loop gain A, is, A A, 1+AB The expression of A, for AB is, 1 = R, Therefore, the closed loop is, -R, Step 7 Determine the resistance of R, Consider the closed loop gain Consider magnitude of the resistance since, it can't be negative. Substitute for A, in equation Therefore, the resistance of is Step 7 Determine the loop gain AB Set and break the loop at input, such that feedback network and loop gain doesn't change. The equivalent circuit diagram is shown in Figure 1. r. + V, R, V Figure Step 7 The loop gain AB is, AB V, V, Apply voltage division rule across resistor V. Therefore, the loop gain AB is Step of 7 Determine the closed loop gain A, Calculation of the loop gain AB is as follows: AB Substitute 1000 for for for for in equation 100k 100 = 1000 102 =980.39 The feedback factor is, R, Substitute for in equation. Step The open loop gain A is, ß Substitute 980.39 for AB -0.001 for in equation 980.39 -0.001 = -980.36 Closed loop gain A, A A, 1+AB Substitute 980.39 for AB -980.36 for A in equation. -980.36k A, 1+980.39 -0.9989 It is very close to the ideal value of -A, = Therefore, the closed loop gain -0.9989

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