| Parameter | Definition |
| F1 | Drain to source resistance
|
| F2 | Transconductance
|
| F3 | Gate to source capacitance
|
| F4 | Gate to drain capacitance
|
| F5 | Drain to source capacitance
|
| F6 | Drain bias current |
| F7 | DC gate current |
| F8 | Drain shot noise 1/f corner |
| F9 | Gate shot noise 1/f corner |
The noise sources are determined from the Gm, Id, and Ig parameters. See Appendix B for more information on FET noise sources.
Example:
* FET with Rds = 10K, Gm = .005, Cgs = 6pfd, Cgd = 2pfd,
* Cds = 1.5pfd, Id = 200uA, Ig = 50 pA,
* 1/f(drain) = 100Hz, 1/f(gate) = 1KHz.
.MODEL FET1 1.e4, .005, 6.e-12, 2.e-12, 1.5e-12, 2.e-4 \
5.e-11, 100., 1.e3