3.5.2 Drain Side Potential and Charge Calculations

The core model calculation at the drain side is shown below:

$v_{ch} = V_{dseff} + \Delta V_{t,QM} \qquad (3.318)$

The drain-side surface potential is computed in the same way as the source-side potential in Section 3.4.3 except that vch is given as shown in Equation (3.310). Based on this core model calculation at the drain side, similar to the approach previously outlined to calculate $q_{is}$, $q_{id}$ is calculated, based on which $\psi_d$ is calculated.