Frequency Response
Contents
Frequency Response#
Poles and nodes#
Fig. 91 Amplifier chain with complex impedances.#
\[\begin{split}
\frac{V_{\text{out}}}{V_{\text{in}}} (s) &= \frac{A_1}{1 + s R_1 C_1} \frac{A_2}{1 + s R_2 C_2} \quad \text{ or } \\
&= \frac{A_o}{\left( 1 + \frac{s}{w_{p_1}} \right) \left( 1 + \frac{s}{w_{p_2}} \right) \ldots}
\end{split}\]
where \(A_o\) is the DC gain. Note that \(\omega_{p_1} = 1/(R_1 C_1)\), \(\omega_{p_2} = 1/(R_2 C_2)\), etc.
Miller effect#
Fig. 92 Miller effect model.#