Mail Archives: geda-user/2020/10/16/11:48:49
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> On Oct 15, 2020, at 11:31 PM, Glenn (glimrick AT epilitimus DOT com) [via =
geda-user AT delorie DOT com] <geda-user AT delorie DOT com> wrote:
>=20
> I did look at spice-noqsi but it didn't look to me like it solved the
> problem.
The spice-prototype attribute in spice-noqsi can do much of what you =
want.
A component omitted from simulation has:
spice-prototype=3D* comment on reason for omission.
A two terminal component to be short-circuited in simulation has:
spice-prototype=3DR? #1 #2 0
There=E2=80=99s great benefit in separating simulation and layout =
environments, see =
https://github.com/noqsi/gnet-spice-noqsi/wiki/Broadband-amplifier-board =
<https://github.com/noqsi/gnet-spice-noqsi/wiki/Broadband-amplifier-board>=
. Simulation-only components may appear in =E2=80=9Ctest fixture=E2=80=9D =
schematics. Flow of revisions from master (layout) to tinkering =
(simulation) may be controlled by a Makefile. Using SPICE to expand =
hierarchy for simulation while flattening hierarchy for layout allows =
for simulation-only components, where the spice-prototype rules =
simulation, while a source file with no components (but possibly =
connections) rules layout.
For me, the missing piece is attributes on net segments. These could be =
used for series parasitics in SPICE (using a suitable spice-prototype) =
as well as communicating current-carrying capacity, impedance, and =
topological constraints to layout. Right now, attributes can be attached =
to nets with graphical symbols, but topological information is lost.
I intended spice-noqsi to augment the toolkit approach, so it doesn=E2=80=99=
t cover things that your configuration files, makefiles, sources, and =
SPICE itself can accomplish.
John Doty Noqsi Aerospace, Ltd.
jpd AT noqsi DOT com
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><br =
class=3D""><div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Oct 15, 2020, at 11:31 PM, Glenn (<a =
href=3D"mailto:glimrick AT epilitimus DOT com" =
class=3D"">glimrick AT epilitimus DOT com</a>) [via <a =
href=3D"mailto:geda-user AT delorie DOT com" =
class=3D"">geda-user AT delorie DOT com</a>] <<a =
href=3D"mailto:geda-user AT delorie DOT com" =
class=3D"">geda-user AT delorie DOT com</a>> wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><span =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none; float: none; =
display: inline !important;" class=3D"">I did look at spice-noqsi but it =
didn't look to me like it solved the</span><br style=3D"caret-color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: normal; letter-spacing: =
normal; text-align: start; text-indent: 0px; text-transform: none; =
white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;" class=3D""><span style=3D"caret-color: rgb(0, 0, =
0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none; float: none; display: inline !important;" =
class=3D"">problem.</span></div></blockquote><br class=3D""></div><div>The=
spice-prototype attribute in spice-noqsi can do much of what you =
want.</div><div><br class=3D""></div><div>A component omitted from =
simulation has:</div><div><br class=3D""></div><div>spice-prototype=3D* =
comment on reason for omission.</div><div><br class=3D""></div><div>A =
two terminal component to be short-circuited in simulation =
has:</div><div><br class=3D""></div><div>spice-prototype=3DR? #1 #2 =
0</div><div><br class=3D""></div><div>There=E2=80=99s great benefit in =
separating simulation and layout environments, see <a =
href=3D"https://github.com/noqsi/gnet-spice-noqsi/wiki/Broadband-amplifier=
-board" =
class=3D"">https://github.com/noqsi/gnet-spice-noqsi/wiki/Broadband-amplif=
ier-board</a>. Simulation-only components may appear in =E2=80=9Ctest =
fixture=E2=80=9D schematics. Flow of revisions from master (layout) to =
tinkering (simulation) may be controlled by a Makefile. Using SPICE to =
expand hierarchy for simulation while flattening hierarchy for layout =
allows for simulation-only components, where the spice-prototype rules =
simulation, while a source file with no components (but possibly =
connections) rules layout.</div><div><br class=3D""></div><div>For me, =
the missing piece is attributes on net segments. These could be used for =
series parasitics in SPICE (using a suitable spice-prototype) as well as =
communicating current-carrying capacity, impedance, and topological =
constraints to layout. Right now, attributes can be attached to nets =
with graphical symbols, but topological information is =
lost.</div><div><br class=3D""></div><div>I intended spice-noqsi to =
augment the toolkit approach, so it doesn=E2=80=99t cover things that =
your configuration files, makefiles, sources, and SPICE itself can =
accomplish.</div><br class=3D""><div class=3D"">
<span class=3D"Apple-style-span" style=3D"border-collapse: separate; =
border-spacing: 0px; color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-ligatures: normal; =
font-variant-caps: normal; font-variant-east-asian: normal; =
font-variant-position: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; text-indent: 0px; text-transform: none; =
orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;"><div =
style=3D"word-wrap: break-word;" class=3D""><span =
class=3D"Apple-style-span" style=3D"border-collapse: separate; =
border-spacing: 0px; color: rgb(0, 0, 0); font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-ligatures: normal; =
font-variant-caps: normal; font-variant-east-asian: normal; =
font-variant-position: normal; font-weight: normal; letter-spacing: =
normal; line-height: normal; text-indent: 0px; text-transform: none; =
orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;"><p =
style=3D"margin: 0px;" class=3D""><font face=3D"Helvetica" size=3D"3" =
style=3D"font-style: normal; font-variant-caps: normal; font-weight: =
normal; font-size: 12px; line-height: normal; font-family: Helvetica;" =
class=3D"">John Doty<span class=3D"Apple-converted-space"> =
<span =
class=3D"Apple-converted-space"> </span><span =
class=3D"Apple-converted-tab"> <span =
class=3D"Apple-converted-space"> </span></span></span>Noqsi =
Aerospace, Ltd.</font></p><p style=3D"margin: 0px;" class=3D""><a =
href=3D"mailto:jpd AT noqsi DOT com" class=3D"">jpd AT noqsi DOT com</a></p><br =
class=3D"Apple-interchange-newline"></span></div></span><br =
class=3D"Apple-interchange-newline">
</div>
<br class=3D""></body></html>=
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