lhlbluesky
Banned
hspice problem ,too
i want to plot the curve ''i-vgs'',then obtain the value of vth0,
but for nmos transistor,my result for vth0 is negetive,why?
please help me.
.options list node post
.lib 'F:\hspice\ms018_v1p4.lib' tt
.op
vdd 1 0 1.8v
vin 2 0 1.0v
m1 0 2 1 1 p18 l=0.18u w=0.18u
.dc vin 0.1v 1.8v 0.1v
.plot dc i(m1)
.end
volt i(m1)
(a ) 0. 50.0000u 100.0000u 150.0000u 200.0000u
+ + + + +
0. 18.071p-a------+------+------+------+------+------+------+------+-
100.0000m 268.342p a + + + + + + + +
200.0000m 4.537n a + + + + + + + +
300.0000m 63.065n a + + + + + + + +
400.0000m 591.556n a + + + + + + + +
500.0000m 3.186u +a + + + + + + + +
600.0000m 9.346u + a + + + + + + + +
700.0000m 18.420u + a + + + + + + + +
800.0000m 29.351u + +a + + + + + + +
900.0000m 41.514u + + a + + + + + + +
1.0000 54.530u-+------+------+a-----+------+------+------+------+------+-
1.1000 68.141u + + + a + + + + + +
1.2000 82.154u + + + + a + + + + +
1.3000 96.429u + + + + a+ + + + +
1.4000 110.855u + + + + + a + + + +
1.5000 125.352u + + + + + a + + +
1.6000 139.855u + + + + + + a + + +
1.7000 154.315u + + + + + + +a + +
1.8000 168.693u + + + + + + + a + +
+ + + + +
i use the formula as follows:
i1/i2=(vgs1-vth0)^2/(vgs2-vth0)^2
please help me,thanks first!
i want to plot the curve ''i-vgs'',then obtain the value of vth0,
but for nmos transistor,my result for vth0 is negetive,why?
please help me.
.options list node post
.lib 'F:\hspice\ms018_v1p4.lib' tt
.op
vdd 1 0 1.8v
vin 2 0 1.0v
m1 0 2 1 1 p18 l=0.18u w=0.18u
.dc vin 0.1v 1.8v 0.1v
.plot dc i(m1)
.end
volt i(m1)
(a ) 0. 50.0000u 100.0000u 150.0000u 200.0000u
+ + + + +
0. 18.071p-a------+------+------+------+------+------+------+------+-
100.0000m 268.342p a + + + + + + + +
200.0000m 4.537n a + + + + + + + +
300.0000m 63.065n a + + + + + + + +
400.0000m 591.556n a + + + + + + + +
500.0000m 3.186u +a + + + + + + + +
600.0000m 9.346u + a + + + + + + + +
700.0000m 18.420u + a + + + + + + + +
800.0000m 29.351u + +a + + + + + + +
900.0000m 41.514u + + a + + + + + + +
1.0000 54.530u-+------+------+a-----+------+------+------+------+------+-
1.1000 68.141u + + + a + + + + + +
1.2000 82.154u + + + + a + + + + +
1.3000 96.429u + + + + a+ + + + +
1.4000 110.855u + + + + + a + + + +
1.5000 125.352u + + + + + a + + +
1.6000 139.855u + + + + + + a + + +
1.7000 154.315u + + + + + + +a + +
1.8000 168.693u + + + + + + + a + +
+ + + + +
i use the formula as follows:
i1/i2=(vgs1-vth0)^2/(vgs2-vth0)^2
please help me,thanks first!