3.20.3 Source Side Junction Capacitance

Bias-independent calculations:

$C_{zbs} = CJS(T) \cdot ASEJ \qquad (3.586)$

$C_{zbssw} = CJSWS(T) \cdot PSEJ \qquad (3.587)$

$C_{zbsswg} = CJSWGS(T) \cdot TFIN \cdot NFIN_{total} \qquad (3.588)$

Bias-dependent calculations:

$Q_{es1} = \begin{cases} C_{zbs} \cdot PBS(T) \cdot \dfrac{1 - \Big( 1 - \dfrac{V_{es}}{PBS(T)} \Big)^{1 - MJS}}{1 - MJS} &\text{ } V_{es} > 0 \\ \\ V_{es} \cdot C_{zbs} + {V_{es}}^2 \cdot \dfrac{MJS \cdot C_{zbs}}{2 \cdot PBS(T)} &\text{ } V_{es} \le 0 \end{cases} \qquad (3.589)$

$Q_{es2} = \begin{cases} C_{zbssw} \cdot PBSWS(T) \cdot \dfrac{1 - \Big( 1 - \dfrac{V_{es}}{PBSWS(T)} \Big)^{1 - MJSWS}}{1 - MJSWS} &\text{ } V_{es} > 0 \\ \\ V_{es} \cdot C_{zbssw} + {V_{es}}^2 \cdot \dfrac{MJSWS \cdot C_{zbssw}}{2 \cdot PBSWS(T)} &\text{ } V_{es} \le 0 \end{cases}$

$(3.590)$

$Q_{es3} = \begin{cases} C_{zbsswg} \cdot PBSWGS(T) \cdot \dfrac{1 - \Big( 1 - \dfrac{V_{es}}{PBSWGS(T)} \Big)^{1 - MJSWGS}}{1 - MJSWGS} &\text{ } V_{es} > 0 \\ \\ V_{es} \cdot C_{zbsswg} + {V_{es}}^2 \cdot \dfrac{MJSWGS \cdot C_{zbsswg}}{2 \cdot PBSWGS(T)} &\text{ } V_{es} \le 0 \end{cases}$

$(3.591)$

$Q_{es} = Q_{es1} + Q_{es2} + Q_{es3} \qquad (3.592)$