# D 10.17 In the circuit of Fig. P10.17, the voltage amplifier is ideal (i.e., it has an infinite input resistance and a zero output resistance).

(a) Use the Miller approach to find an expression for the input capacitance Cin in terms of A and C.

(b) Use the expression for Cin to obtain the transfer function Vo(s)/Vsig(s).

(c) If Rsig = 1 kΩ, and the gain Vo/Vsig is to have a dc value of 40 dB and a 3-dB frequency of 100 kHz, find the values required for A and C.

(d) Sketch a Bode plot for the gain and use it to determine the frequency at which its magnitude reduces to unity.

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