Alex Liao
Member level 4
Hi,
I want to know how the spectre gives Cgs,Cds and Cgd.
Every time I do a DC print I could see a lot of parameters.
1. For the listed three, I am wondering how the Spectre gives them. Any equations?
2.Is the Cgs in the DC print table showing the total parasitic capacitance between the gate and the source or the intrinsic one?
3.How come Cgs is not equal to Csg and why there are minus for capacitance? Capacitance should ignore the direction of measurement between two places. Maybe I have some misunderstanding.
Any response is highly appreciated.
Thank you.
Alex
I want to know how the spectre gives Cgs,Cds and Cgd.
Every time I do a DC print I could see a lot of parameters.
1. For the listed three, I am wondering how the Spectre gives them. Any equations?
2.Is the Cgs in the DC print table showing the total parasitic capacitance between the gate and the source or the intrinsic one?
3.How come Cgs is not equal to Csg and why there are minus for capacitance? Capacitance should ignore the direction of measurement between two places. Maybe I have some misunderstanding.
Any response is highly appreciated.
Thank you.
Alex
Code:
OP("/I0" "??") = ?
signal OP("/I0/MM0" "??")
betaeff 42.42m
cbb 240.1a
cbd -20.86a
cbdbo -20.86a
cbg -404.4a
cbgbo -404.4a
cbs 185.2a
cbsbo 185.2a
cdb -3.269a
cdd 844.2a
cddbo 20.26a
cdg -842.7a
cdgbo -18.81a
cds 1.812a
cdsbo 1.812a
cgb -57.53a
cgd -735.2a
cgdbo 88.76a
cgg 3.111f
cggbo 1.462f
cgs -2.318f
cgsbo -1.493f
cjd 1.522f
cjs 3.15f
covlgb 0
covlgd 823.9a
covlgs 824.6a
csb -179.3a
csd -88.16a
csg -1.863f
css 2.131f
gbd 1.869p
gbs 1.215p
gds 300.1u
gm 1.771m
gmbs 295.1u
gmoverid 13.61
ibulk -98.45f
id 130.1u
ids 130.1u
igb 211.1a
igbacc 211.1a
igbinv 576.8y
igcd 162p
igcs 175.3p
igd 84.91p
igdt 811.7p
igidl 0
igisl 0
igs 389.5p
pwr 27.04u
rdeff 11.63
region 2
reversed 0
rgbd 0
ron 1.597K
rseff 12.51
vbs -62.53u
vds 211m
vdsat 82.18m
vgs 438.8m
vth 428m