"Dynamic response"

Dynamic response

Influence of $R_B$ on the small-signal transfer

The source-to-load voltage transfer $A_v$ is found as:

\begin{equation} A_{v}=- \frac{C_{A} R_{B} R_{\ell} s}{\left(R_{\ell} + R_{o}\right) \left(0.5 C_{A} R_{B} s + 1\right)} \end{equation}

Gain factor

$- \frac{C_{A} R_{B} R_{\ell}}{R_{\ell} + R_{o}}$

Normalized coefficients of the numerator:

ordercoefficient
$0$$0$
$1$$1$

Normalized coefficients of the denominator:

ordercoefficient
$0$$1$
$1$$0.5 C_{A} R_{B}$

Minimum value of $R_B$

$R_B$ causes a high-pass transfer. The frequency of the pole should maximally equal the minimum frequency of interest $f_{min}$. From that we obtain the design equation:

\begin{equation} f_{min}=\frac{1}{\pi C_{A} R_{B}} \end{equation}

From this we obtain:

\begin{equation} R_{B min}=5.053 \cdot 10^{6} \end{equation}

Go to RB_Bandwidth_index

SLiCAP: Symbolic Linear Circuit Analysis Program, Version 1.0 © 2009-2021 SLiCAP development team

For documentation, examples, support, updates and courses please visit: analog-electronics.eu

Last project update: 2021-04-05 16:24:22