Figure 1.

Numerical values of ${\overline{\text{S}}}_{{}_{\text{n}}}$ and ${\overline{\text{S}}}_{{}_{\text{n}}}/{\overline{\text{S}}}_{{}_{\text{n}}}^{{}_{\text{in}}}$ as a function of V_in based on Eq. (2). The markers represent the calculated values, and the solid lines represent the corresponding linear fittings. The dashed line is identity line (y = x).