Question: I get this error * * warning * * ( nmos _ vth:m 7 ( input . ckt: 3 7 ) ) Warning: Acde =

I get this error **warning**(nmos_vth:m7(input.ckt:37)) Warning: Acde =0.280299 may be too small in BSIM4 model with w=5e-07 l=5e-08. how can I fix it here is my hspice code that uses 45nm transistors of pmos and nmos ..subckt opamp_Design1 local_gnd ibias vdd _net0_net1 vout
m7 vout net4 local_gnd local_gnd NMOS_VTH L=50e-9 W=500e-9 AD=9.45e-15 AS=9.45e-15 PD=300e-9 PS=300e-9 M=1
m2 net12 net2 local_gnd local_gnd NMOS_VTH L=50e-9 W=500e-9 AD=9.45e-15 AS=9.45e-15 PD=300e-9 PS=300e-9 M=1
m0 net4 net2 local_gnd local_gnd NMOS_VTH L=50e-9 W=500e-9 AD=9.45e-15 AS=9.45e-15 PD=300e-9 PS=300e-9 M=1
m6 net4_net0 net8 local_gnd PMOS_VTH L=50e-9 W=1e-6 AD=9.45e-15 AS=9.45e-15 PD=300e-9 PS=300e-9 M=1
m5 ibias net6 vdd vdd PMOS_VTH L=50e-9 W=1e-6 AD=9.45e-15 AS=9.45e-15 PD=300e-9 PS=300e-9 M=1
m4 net12_net1 net8 local_gnd PMOS_VTH L=50e-9 W=1e-6 AD=9.45e-15 AS=9.45e-15 PD=300e-9 PS=300e-9 M=1
m3 vout net6 vdd vdd PMOS_VTH L=50e-9 W=1e-6 AD=9.45e-15 AS=9.45e-15 PD=300e-9 PS=300e-9 M=1
m1 net8 net6 vdd vdd PMOS_VTH L=50e-9 W=1e-6 AD=9.45e-15 AS=9.45e-15 PD=300e-9 PS=300e-9 M=1
c1 vout net361e-12
c0 vout local_gnd 5e-12
r0 net4 net361e3
r_dc1 net2 local_gnd 1e9
r_dc2 net6 local_gnd 1e9
.ends opamp_Design1
I am using hspice in cadence virtuoso
thanks

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