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## Main Question or Discussion Point

I'm looking for the threshold voltage Vtn, the MOSFET transconductance parameter kn and the channel length modulation parameter for MOSFET 6 on the CD4007. Where can I look these values up?

- Thread starter KeithLucas
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I'm looking for the threshold voltage Vtn, the MOSFET transconductance parameter kn and the channel length modulation parameter for MOSFET 6 on the CD4007. Where can I look these values up?

- #2

davenn

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did you try the datasheet ?

would be the obvious starting place

cheers

Dave

would be the obvious starting place

cheers

Dave

- #3

meBigGuy

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Did YOU try the data sheet? Not such an obvious place for what was being asked.did you try the datasheet ?

would be the obvious starting place

cheers

Dave

Moving on:

OP, Which FET do you consider to be #6?

The answer would be foundry and process dependent and I doubt it is available on any data sheet. Maybe you can look for a spice model and either read the model (if it is readable), or use spice to extract the data.

Here is a lab example

http://www.ece.ucsb.edu/Faculty/rodwell/Classes/ece2c/labs/Lab_2_2C_2007.pdf

EDIT

Here is the spice model

CD4007 NMOS and PMOS transistor SPICE models

* Typical - Typical Condition

.model MbreakND NMOS

+ Level=1 Gamma= 0 Xj=0

+ Tox=1200n Phi=.6 Rs=0 Kp=111u Vto=2.0 Lambda=0.01

+ Rd=0 Cbd=2.0p Cbs=2.0p Pb=.8 Cgso=0.1p

+ Cgdo=0.1p Is=16.64p N=1

*The default W and L is 30 and 10 um respectively and AD and AS

*should not be included.

.model MbreakPD PMOS

+ Level=1 Gamma= 0 Xj=0

+ Tox=1200n Phi=.6 Rs=0 Kp=55u Vto=-1.5 Lambda=0.04

+ Rd=0 Cbd=4.0p Cbs=4.0p Pb=.8 Cgso=0.2p

+ Cgdo=0.2p Is=16.64p N=1

*The default W and L is 60 and 10 um respectively and AD and AS

*should not be included.

Last edited:

- #4

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Thanks, I'll run a SPICE model to get it!

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