Keith
here is the model i downloaded + the **error** from HSpice, i think u have deleted some parameters in ur model:
.subckt bzx84c3v0lt1 2 1
**************************************
* model generated by modpex *
*copyright(c) symmetry design systems*
* all rights reserved *
* unpublished licensed software *
* contains proprietary information *
* which is the property of *
* symmetry or its licensors *
*commercial use or resale restricted *
* by symmetry license agreement *
**************************************
* model generated on mar 10, 06
* model format: pspice
* anode cathode
*node: 2 1
* forward section
d1 2 1 md1
.model md1 d is=5.21532e-16 n=1 xti=1 rs=0.5
+ cjo=4.5e-10 tt=1e-08
* leakage current
r 1 2 mdr 1.53846e+06
.model mdr res tc1=0 tc2=0
* breakdown
**error**: unknown model type: res
rz 2 3 14.6948
izg 4 3 0.24
r4 4 3 3500
d3 3 4 md3
.model md3 d is=2.5e-12 n=2.76529 xti=0 eg=0.1
d2 5 4 md2
.model md2 d is=2.5e-12 n=10.6468 xti=0 eg=0.1
ev1 1 5 6 0 1
ibv 0 6 0.001
rbv 6 0 mdrbv -1158.4
.model mdrbv res tc1=0.00196824
*-- pspice diode model default parameter
* values are assumed
*is=1e-14 rs=0 n=1 tt=0 cjo=0
*vj=1 m=0.5 eg=1.11 xti=3 fc=0.5
*kf=0 af=1 bv=inf ibv=1e-3 tnom=27
**error**: unknown model type: res
.ends bzx84c3v0lt1
I want to use this Zener diode for the required voltage in the gate of a CMOS in 0.5um (the transistor gonna work like a buffer).
The diode is connected to the supply voltage by a resistor. For first step a Zener diode with 2v voltage is ok, but as i said when i used the model i posted before, with different source resistors, the gate voltage which is connected to the diode, changes.
I dont know it was because of a wrong Zener model or the circuit itself?