On Sat, 12 Aug 2017 19:48:54 +0100, "Kevin Aylward"
<kevinRemovAT@kevinaylward.co.uk> wrote:
>"Jim Thompson" wrote in message
>news:ldcuoc9mmc9jj38r2bsegmtfqvk2bacif2@4ax.com...
>
>On Sat, 12 Aug 2017 17:43:52 +0100, "Kevin Aylward"
><kevinRemovAT@kevinaylward.co.uk> wrote:
>
>>>>"Jim Thompson" wrote in message
>>>>news:m9dsoctfehr3uoclrcjajtv8qubsgsia5d@4ax.com...
>>
>>>>PING: Aylward or other Spice Expert...
>>
>>>>Bringing up a 0.18u/0.35u Vanguard process, building up the PSpice
>>>>model libraries.
>>
>>>>Discovered strangeness:
>>
>>>>ALL devices have HDIF=0.2u, except "native" NMOS, which has
>>>>HDIF=0.02u!!
>>
>>>>I thought this might simply be a typo, but that HDIF value is repeated
>>>>in each of the corner parameter statements.
>>
>>>>0.02u seems awfully small to me.
>>
>>>>Can this be correct?
>>>
>>>Nope. It can't be less than the contact width for starters!
>>
>>>hdif is half the diffusion width of the S/D. 2 x hdif has to be larger
>>>than
>>>the contact square side because the contact sits in it!
>>
>>>If you could draw lines at 0.02u, it would be a 0.02u process...
>>
>>>So, imagine a S or D strip, with a row of contacts in it. 2 X hdif is the
>>>width of the strip, by definition. hdif allows the parasites to be
>>>calculated.
>>
>>>i.e.
>>
>>>AD=2*hdif * W
>>
>>>AS=2*hdif * W
>>
>>>PD=2*2*hdif + 2*W
>>
>>>PS=PD=2*2*hdif + 2*W
>>
>>
>>>Is what I have SS do when I added hdif to the engine.
>>
>>>If I don't have the data of hdif for a process, I add maby 20% to the
>>>process min geometry as a guess.
>
>>Yep. Precisely what I do in PSpice...
>
>So... you were just looking for an accomplice then....
>
>-- Kevin Aylward
>http://www.anasoft.co.uk - SuperSpice
>http://www.kevinaylward.co.uk/ee/index.html
Just wanted to make sure I wasn't missing something ;-)
...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I'm looking for work... see my website.
Thinking outside the box...producing elegant & economic solutions.
Reply by Kevin Aylward●August 12, 20172017-08-12
"Jim Thompson" wrote in message
news:ldcuoc9mmc9jj38r2bsegmtfqvk2bacif2@4ax.com...
On Sat, 12 Aug 2017 17:43:52 +0100, "Kevin Aylward"
<kevinRemovAT@kevinaylward.co.uk> wrote:
>>>"Jim Thompson" wrote in message
>>>news:m9dsoctfehr3uoclrcjajtv8qubsgsia5d@4ax.com...
>
>>>PING: Aylward or other Spice Expert...
>
>>>Bringing up a 0.18u/0.35u Vanguard process, building up the PSpice
>>>model libraries.
>
>>>Discovered strangeness:
>
>>>ALL devices have HDIF=0.2u, except "native" NMOS, which has
>>>HDIF=0.02u!!
>
>>>I thought this might simply be a typo, but that HDIF value is repeated
>>>in each of the corner parameter statements.
>
>>>0.02u seems awfully small to me.
>
>>>Can this be correct?
>>
>>Nope. It can't be less than the contact width for starters!
>
>>hdif is half the diffusion width of the S/D. 2 x hdif has to be larger
>>than
>>the contact square side because the contact sits in it!
>
>>If you could draw lines at 0.02u, it would be a 0.02u process...
>
>>So, imagine a S or D strip, with a row of contacts in it. 2 X hdif is the
>>width of the strip, by definition. hdif allows the parasites to be
>>calculated.
>
>>i.e.
>
>>AD=2*hdif * W
>
>>AS=2*hdif * W
>
>>PD=2*2*hdif + 2*W
>
>>PS=PD=2*2*hdif + 2*W
>
>
>>Is what I have SS do when I added hdif to the engine.
>
>>If I don't have the data of hdif for a process, I add maby 20% to the
>>process min geometry as a guess.
On Sat, 12 Aug 2017 17:43:52 +0100, "Kevin Aylward"
<kevinRemovAT@kevinaylward.co.uk> wrote:
>>"Jim Thompson" wrote in message
>>news:m9dsoctfehr3uoclrcjajtv8qubsgsia5d@4ax.com...
>
>>PING: Aylward or other Spice Expert...
>
>>Bringing up a 0.18u/0.35u Vanguard process, building up the PSpice
>>model libraries.
>
>>Discovered strangeness:
>
>>ALL devices have HDIF=0.2u, except "native" NMOS, which has
>>HDIF=0.02u!!
>
>>I thought this might simply be a typo, but that HDIF value is repeated
>>in each of the corner parameter statements.
>
>>0.02u seems awfully small to me.
>
>>Can this be correct?
>
>Nope. It can't be less than the contact width for starters!
>
>hdif is half the diffusion width of the S/D. 2 x hdif has to be larger than
>the contact square side because the contact sits in it!
>
>If you could draw lines at 0.02u, it would be a 0.02u process...
>
>So, imagine a S or D strip, with a row of contacts in it. 2 X hdif is the
>width of the strip, by definition. hdif allows the parasites to be
>calculated.
>
>i.e.
>
>AD=2*hdif * W
>
>AS=2*hdif * W
>
>PD=2*2*hdif + 2*W
>
>PS=PD=2*2*hdif + 2*W
>
>
>Is what I have SS do when I added hdif to the engine.
>
>If I don't have the data of hdif for a process, I add maby 20% to the
>process min geometry as a guess.
>
>
>-- Kevin Aylward
>http://www.anasoft.co.uk - SuperSpice
>http://www.kevinaylward.co.uk/ee/index.html
Yep. Precisely what I do in PSpice...
<http://www.analog-innovations.com/DeviceSymbolWithBinning.pdf>
(PSpice doesn't natively do binning, so I devised my own way ;-)
(Should say 'PMOS' in the description :-[
...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I'm looking for work... see my website.
Thinking outside the box...producing elegant & economic solutions.
Reply by Kevin Aylward●August 12, 20172017-08-12
>"Jim Thompson" wrote in message
>news:m9dsoctfehr3uoclrcjajtv8qubsgsia5d@4ax.com...
>PING: Aylward or other Spice Expert...
>Bringing up a 0.18u/0.35u Vanguard process, building up the PSpice
>model libraries.
>Discovered strangeness:
>ALL devices have HDIF=0.2u, except "native" NMOS, which has
>HDIF=0.02u!!
>I thought this might simply be a typo, but that HDIF value is repeated
>in each of the corner parameter statements.
>0.02u seems awfully small to me.
>Can this be correct?
Nope. It can't be less than the contact width for starters!
hdif is half the diffusion width of the S/D. 2 x hdif has to be larger than
the contact square side because the contact sits in it!
If you could draw lines at 0.02u, it would be a 0.02u process...
So, imagine a S or D strip, with a row of contacts in it. 2 X hdif is the
width of the strip, by definition. hdif allows the parasites to be
calculated.
i.e.
AD=2*hdif * W
AS=2*hdif * W
PD=2*2*hdif + 2*W
PS=PD=2*2*hdif + 2*W
Is what I have SS do when I added hdif to the engine.
If I don't have the data of hdif for a process, I add maby 20% to the
process min geometry as a guess.
-- Kevin Aylward
http://www.anasoft.co.uk - SuperSpice
http://www.kevinaylward.co.uk/ee/index.html
Reply by Jim Thompson●August 11, 20172017-08-11
PING: Aylward or other Spice Expert...
Bringing up a 0.18u/0.35u Vanguard process, building up the PSpice
model libraries.
Discovered strangeness:
ALL devices have HDIF=0.2u, except "native" NMOS, which has
HDIF=0.02u!!
I thought this might simply be a typo, but that HDIF value is repeated
in each of the corner parameter statements.
0.02u seems awfully small to me.
Can this be correct?
...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I'm looking for work... see my website.
Thinking outside the box...producing elegant & economic solutions.