I think you have misunderstood. You can put a
10f (femtofarad) cap in an .ASC by writing that value in the
component property pane. Try it: feed a 10f cap via 1meg and the
-3dB point is at 16MHz.
On 2025-02-24 23:00, Bell, Dave via
groups.io wrote:
Yes, I agree, on
all counts. It means Farads, in lower OR upper case.
But in the
.options context, it appears to accept 10f as 10
femtofarads.
That¡¯s logical,
because who would want a 10F parasitic shunt capacitance?
?
I¡¯m just disturbed
that it¡¯s different, between contexts.
Not much different
from ^ vs. **, where the carat could mean exponentiation or
exclusive OR
?
?
?
I
think that 10 means 10 farads, 10m means 10 millifarads etc,
but, with a space in between, 10 f or 10 F or 10 m means 10
farads and the following letter is disregarded, or throws an
error in some cases. This works in the component properties
pane.
On 2025-02-24 21:52, Bell, Dave via
groups.io wrote:
In *this case*,
I see that.
Seems like a bit
inconsistent¡
?
?
10f
is recognized as 10 femtofarads.
On 2025-02-24 21:29, Bell, Dave via
groups.io wrote:
Is ¡°10f¡±
a special case in the parasitics settings?
For a
regular cap, it would mean 10 Farads!
?
?
The following line solved the
problem.Is there some manual or intution regarding why
these might help?
.options
cshunt =10f gshunt=10n abstol=10n vntol=1m
--
OOO - Own Opinions only If something is true: * as far as
we know - it's science *for certain - it's mathematics
*unquestionably - it's religion
--
OOO - Own Opinions only If something is true: * as far as we
know - it's science *for certain - it's mathematics
*unquestionably - it's religion
--
OOO - Own Opinions only
If something is true:
* as far as we know - it's science
*for certain - it's mathematics
*unquestionably - it's religion
John Woodgate