Update content - 2026-10-14

content/book/fleming14_desig_model_contr_nanop_system.md

@@ -39,13 +39,13 @@ Typical value of \\(R\_s\\) is between \\(10\\) and \\(100 \Omega\\).
 When considering the effects of both output impedance and cable inductance, the transfer function from source voltage \\(V\_s\\) to load voltage \\(V\_L\\) is second-order low pass filter:
 
 \begin{equation}
-  \frac{V\_L(s)}{V\_s(s)} = \frac{1}{\frac{s^2}{\omega\_r^2} + 2 \xi \frac{s}{\omega\_r} + 1}
+  \frac{V\_L(s)}{V\_s(s)} = \frac{1}{\frac{s^2}{\omega\_r^2} + 2 \zeta \frac{s}{\omega\_r} + 1}
 \end{equation}
 
 with:
 
 -   \\(\omega\_r = \frac{1}{\sqrt{L C\_p}}\\)
--   \\(\xi = \frac{R\_s \sqrt{L C\_p}}{2 L}\\)
+-   \\(\zeta = \frac{R\_s \sqrt{L C\_p}}{2 L}\\)
 
 
 ## Amplifier small-signal Bandwidth {#amplifier-small-signal-bandwidth}