A question about Diode Clamps
No, it's more like the following:

$$V_{out} = 
\begin{cases} 
  V_{in},       &amp; \text{if } V_{in} \lt  0.6V + Offset \\ 
  0.6V + Offset, &amp; \text{if } V_{in} \geq 0.6V + Offset 
\end{cases} 
$$