The junction (depletion) and diffusion capacitances are
Figure J.1 Piecewise linear current (PWL) approximation of the v‐i characteristic curve of a diode and the corresponding model.
Figure J.2 Symbol, v‐i characteristic, and PWL model of a Zener diode.
Figure J.3 High‐frequency AC (small‐signal) model of a diode.
Table J.1 PSpice model parameters of diode.
SPICE name
Model parameter
Default value
IS
Transport saturation current Is
10−14
RS
Ohmic (series) resistance Rs
0 [Ω]
N
Emission (ideality) coefficient η
1
CJO
Zero‐bias junction capacitance Cj0
0
VJ
PN junction (built‐in) potential ϕB
1 [V]
MJ
PN grading coefficient m
0.5
TT
Transit time τt
0 [s]
BV
Reverse breakdown voltage VZ
∞ [V]
IBV
Reverse breakdown current IZ
10−3
(J.1)
J.2 BJT (Bipolar Junction Transistor)
gm: transconductance (gain)
(J.2)
(J.3)
Cbe/Cbc: zero‐bias B‐E/B‐C junction capacitances
(J.4)
Cbe0(CJE)/Cbc0(CJC): zero‐bias B‐E/B‐C ...
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(J.3)