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480 4. Appendix
4.3.3 MOS Field-Effect Transistor
syntax
{Mname, {n −>D, n −>G, n −>S, n −>B}, Model−>MOSFET, Selector−>selector, parameters}
denotes a subcircuit reference for a MOSFET
Subcircuit reference for MOSFET.
D
D
G
B
G
B
S
S
Valid values for selector are: Spice, SpiceDC, SpiceAC, and SpiceNoise. Possible parameters are
described below.
Large-Signal Model
The analog behavioral model included in the Analog Insydes model library has the following port
characteristics:
D
Voltage[D,B]
Current[D,B]
Voltage[G,B]
G
Current[G,B]
S
B
Voltage[S,B]
Current[S,B]
where G denotes the Gate, D the Drain, S the Source, and B the Bulk, respectively. The port currents
can be expressed in the port variables as follows:
Gate:
Drain:
Source:
Bulk:
i G t ⩵ Current[G,B]t
i D t ⩵ Current[D,B]t
i S t ⩵ Current[S,B]t
i B t ⩵ Current[G,B]t Current[D,B]t Current[S,B]t