slackey@bbn.com (Stan Lackey) (04/22/89)
From a SPICE neophyte... I am trying to make a model for a schottky diode. I set the eg parameter to .69 as stated in the manual, but the model continues to behave as a regular silicon diode. What else must I do? I am using HSPICE on Sun. Thanks. -Stan
mark@mips.COM (Mark G. Johnson) (04/24/89)
In article <38973@bbn.COM> slackey@BBN.COM (Stan Lackey) writes: >From a SPICE neophyte... > >I am trying to make a model for a schottky diode. I set the eg parameter >to .69 as stated in the manual, but the model continues to behave as a >regular silicon diode. What else must I do? > >I am using HSPICE on Sun. >Thanks. -Stan No guarantees of course, but you might find these helpful: * 1N4150 (a very fast silicon diode) .MODEL Dsil D( RS=1.16 IS=2E-14 + EG=1.11 CJO=2.5P + N=1.0 M=0.5 + PB=0.6 TT=2.6E-9) * * MBD101 schottky diode .MODEL Dsch D( RS=2.00 IS=2E-14 + EG=0.69 CJO=1.5P + N=1.0 M=0.5 + PB=0.4 TT=1.0E-9) -- -- Mark Johnson MIPS Computer Systems, 930 E. Arques, Sunnyvale, CA 94086 ...!decwrl!mips!mark (408) 991-0208
rd@hpcilzb.HP.COM (Dick Dowell) (05/01/89)
>I am trying to make a model for a schottky diode. I set the eg parameter >to .69 as stated in the manual, but the model continues to behave as a >regular silicon diode. What else must I do? EG is only used in the calculation of IS versus temperature. I'm no expert, but I think the "room temperature" difference in Schottky versus regular diodes is the forward voltage drop. You can either put a larger value for IS, or a smaller value for N in to change this. Probably the larger value for IS is most correct.
slackey@bbn.com (Stan Lackey) (05/03/89)
A while a go I wrote: > >I am trying to make a model for a schottky diode. I set the eg parameter In article <4240001@hpcilzb.HP.COM> rd@hpcilzb.HP.COM (Dick Dowell) writes: > EG is only used in the calculation of IS versus temperature. > You can either put a larger value > for IS, or a smaller value for N in to change this. Thanks for your reply. I ended up calling the HSPICE hotline and they suggested the lower value for N, which is what I did and it is behaving as I would expect. -Stan