Resistência de Entrada CG

Prévia do material em texto

Step 1 of 4 8.011E Consider the expression for the input resistance of the CG amplifier at » 1. = I + (1) 8m Substitute 0 for = 1 + 0 1 = 1 Therefore, the value of the input resistance at = 0 is 8m Step 2 of 4 Recall equation (1). Rin = I + 8m Substitute for Rin = + = + 1 8m 8m 2 = 8m 2 Therefore, the value of the input resistance at = is 8m Step 3 of 4 Recall equation (1). Rin = + Substitute for = 1 + 8m = 8m 1 As » it implies » Rin = 1 + 8m = 8m 1 = Therefore, the value of the input resistance at = is Step 4 of 4 Recall equation (1). = + Substitute for = + = 8m Therefore, the value of the input resistance at = 8 is 8