CD4007 Specs: Vtn, kn, Channel Length Modulation

  • Thread starter Thread starter KeithLucas
  • Start date Start date
Click For Summary
SUMMARY

The CD4007 MOSFET specifications for threshold voltage (Vtn), transconductance parameter (kn), and channel length modulation parameter (λ) can be derived from SPICE models rather than standard datasheets. The discussion highlights that these values are foundry and process-dependent, making them often unavailable in typical datasheets. A provided SPICE model outlines the parameters for both NMOS and PMOS transistors, including Vto and Kp values, which are essential for accurate simulations.

PREREQUISITES
  • Understanding of MOSFET parameters such as threshold voltage (Vtn) and transconductance (kn).
  • Familiarity with SPICE simulation tools for circuit modeling.
  • Knowledge of semiconductor physics and device characteristics.
  • Ability to interpret technical datasheets and SPICE model syntax.
NEXT STEPS
  • Research the SPICE modeling techniques for NMOS and PMOS transistors.
  • Learn how to extract parameters from SPICE models for circuit analysis.
  • Explore the impact of channel length modulation on MOSFET performance.
  • Review the datasheet specifications for the CD4007 to understand its application context.
USEFUL FOR

Electrical engineers, circuit designers, and students working with MOSFET technology and SPICE simulations will benefit from this discussion.

KeithLucas
Messages
8
Reaction score
0
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?
 
Engineering news on Phys.org
did you try the datasheet ?
would be the obvious starting place :wink:

cheers
Dave
 
davenn said:
did you try the datasheet ?
would be the obvious starting place :wink:

cheers
Dave

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

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

Similar threads

  • · Replies 4 ·
Replies
4
Views
5K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 9 ·
Replies
9
Views
2K
Replies
5
Views
6K
  • · Replies 3 ·
Replies
3
Views
18K
Replies
5
Views
2K
  • · Replies 12 ·
Replies
12
Views
3K
  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 13 ·
Replies
13
Views
4K