How to get LABMDA in general (without it in lib.)

How to get LABMDA in general (without it in lib.)

 

_reason for using this way

Lambda is not a constant value in a short channel device (one of the reason for that is variable in the effective channel length(아; 영어는 어렵다.어쨌던 I want to get the IDEA only in the article J). Because of that we should have assumption before doing hand calculation.

 

_draw a CKT in a spice

 

*in P-spice

 

.lib 'SNU.LIB'TT

 

Vgs    g1    GND    1.2V

Vds    d1    GND    0V

M1     d1     g1     GND    GND    n_12_hsl130e     w=1u     l=0.13u

 

.param

.op

.dc     Vds     0     1.2     0.0001

.PROBE v(*) i(*)

.END                    *in H-spice

 

_simulate the CKT for getting Id_Vds curve

 

 

_getting LABMDA in VA (lambda = 1/va)

 

lambda is about 0.2378 (in the condition w=1u     l=0.13u)

 

VA about 4.205

(1.1999,579.84u)

(0.5656,511.79u)

 

_If there are any errs, NOT feel free to correct me. J

_I just want you to get idea from here.

_I am KOREAN and it could be not correct.

_However I got the idea from lab mate who is in analog design lab.