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On Sat, 01 Jan 2022 13:45:00 -0500, legg <le...@nospam.magma.ca> wrote:
On Sat, 1 Jan 2022 04:01:57 -0800 (PST), Anthony William Sloman
bill....@ieee.org> wrote:
On Saturday, January 1, 2022 at 12:43:32 PM UTC+11, jla...@highlandsniptechnology.com wrote:
On Fri, 31 Dec 2021 20:21:16 -0500, legg <le...@nospam.magma.ca> wrote:
On Fri, 31 Dec 2021 09:23:48 -0800, jla...@highlandsniptechnology.com wrote:
On Fri, 31 Dec 2021 11:38:25 -0500, legg <le...@nospam.magma.ca> wrote:
On Thu, 30 Dec 2021 19:05:06 -0800 (PST), Anthony William Sloman <bill....@ieee.org> wrote:
On Friday, December 31, 2021 at 5:21:07 AM UTC+11, John Larkin wrote:
On Thu, 30 Dec 2021 09:08:03 -0500, legg <le...@nospam.magma.ca> wrote:
On Thu, 30 Dec 2021 19:04:22 +1100, Sylvia Else <syl...@email.invalid
wrote:
On 30-Dec-21 4:11 pm, jla...@highlandsniptechnology.com wrote:
Version 4
snip
What is the use-case for this that a conventional digital isolator
wouldn\'t be suitable for?
Sometimes used in lower frequency isolated gate drive, when minimal
magnetics cost is the aim.
It\'s faster than most isolators, and is DC-coupled, after a power-up
priming shot.
Not a claim that\'s worth making for a purely theoretical transformer driving an LT Spice generic Schmitt trigger.
No parallel capacitance across either inductor, and no current induced in the transformer core - it\'s a little too theoretical too swank about.
It worked fine when I did it in 1979, but I wasn\'t around to see it go into production (if it did).
Getting the model to act like the real thing takes time and effort.
Getting the real thing to act like the model is probably delusional.
Right, it\'s best to avoid designing any electronics. It\'s too hard and
too risky.
Hey! The model works! What\'s HIS problem . . . ?
Do you mean Sloman?
Legg was responding to one of your posts, not mine.
He\'s the group leader on never actually doing anything.
I\'d got what you posted working with real parts back in 1979 - I\'d already done it, so why would I need to do it again?
So naturally he finds reasons why nothing will work.
I didn\'t say it wouldn\'t work - I just pointed out that the transformer model wasn\'t all that realistic, and neither was the Schmitt trigger.
You could have done quite a bit better, and telling us what you had in mind to use for your transformer would have been a good start.
Simulationss are useful in that they suggest what should or
could work.
If you limit it to a specific application, you can introduce
realistic strays and likely operating conditions with increasingly
more accurate models.
The \'party trick\' aspect of this circuit was the miniscule magnetic
component that was possible - though reduction in actual cost shows
diminishing and even reversing returns as you get carried away.
An integrated magnetic component has been used in some places,
though the isolation tended to be compromised.
Semiconductor \'pulse stretchers\' go back to the mid 70\'s. Physical
iteration may still be the fastest way to implimentation for a
practical app, though a pencil and paper can cut this work down.
The simulation just eats man-hours.
RL
Spice is great. It lets a person play with ideas quickly, explore
hunches, get quantitative with the things that look promising.
Sometimes I design a circuit and understand it later, if ever.
https://www.youtube.com/watch?v=x6TrbD7-IwU
\"Intuition is the most important part of engineering.\"
\"The function of a simulator is to train your instincts.\"
On Saturday, January 1, 2022 at 12:45:52 PM UTC-8, jla...@highlandsniptechnology.com wrote:
On Sat, 01 Jan 2022 13:45:00 -0500, legg <le...@nospam.magma.ca> wrote:
On Sat, 1 Jan 2022 04:01:57 -0800 (PST), Anthony William Sloman
bill....@ieee.org> wrote:
On Saturday, January 1, 2022 at 12:43:32 PM UTC+11, jla...@highlandsniptechnology.com wrote:
On Fri, 31 Dec 2021 20:21:16 -0500, legg <le...@nospam.magma.ca> wrote:
On Fri, 31 Dec 2021 09:23:48 -0800, jla...@highlandsniptechnology.com wrote:
On Fri, 31 Dec 2021 11:38:25 -0500, legg <le...@nospam.magma.ca> wrote:
On Thu, 30 Dec 2021 19:05:06 -0800 (PST), Anthony William Sloman <bill....@ieee.org> wrote:
On Friday, December 31, 2021 at 5:21:07 AM UTC+11, John Larkin wrote:
On Thu, 30 Dec 2021 09:08:03 -0500, legg <le...@nospam.magma.ca> wrote:
On Thu, 30 Dec 2021 19:04:22 +1100, Sylvia Else <syl...@email.invalid
wrote:
On 30-Dec-21 4:11 pm, jla...@highlandsniptechnology.com wrote:
Version 4
snip
What is the use-case for this that a conventional digital isolator
wouldn\'t be suitable for?
Sometimes used in lower frequency isolated gate drive, when minimal
magnetics cost is the aim.
It\'s faster than most isolators, and is DC-coupled, after a power-up
priming shot.
Not a claim that\'s worth making for a purely theoretical transformer driving an LT Spice generic Schmitt trigger.
No parallel capacitance across either inductor, and no current induced in the transformer core - it\'s a little too theoretical too swank about.
It worked fine when I did it in 1979, but I wasn\'t around to see it go into production (if it did).
Getting the model to act like the real thing takes time and effort.
Getting the real thing to act like the model is probably delusional.
Right, it\'s best to avoid designing any electronics. It\'s too hard and
too risky.
Hey! The model works! What\'s HIS problem . . . ?
Do you mean Sloman?
Legg was responding to one of your posts, not mine.
He\'s the group leader on never actually doing anything.
I\'d got what you posted working with real parts back in 1979 - I\'d already done it, so why would I need to do it again?
So naturally he finds reasons why nothing will work.
I didn\'t say it wouldn\'t work - I just pointed out that the transformer model wasn\'t all that realistic, and neither was the Schmitt trigger.
You could have done quite a bit better, and telling us what you had in mind to use for your transformer would have been a good start.
Simulationss are useful in that they suggest what should or
could work.
If you limit it to a specific application, you can introduce
realistic strays and likely operating conditions with increasingly
more accurate models.
The \'party trick\' aspect of this circuit was the miniscule magnetic
component that was possible - though reduction in actual cost shows
diminishing and even reversing returns as you get carried away.
An integrated magnetic component has been used in some places,
though the isolation tended to be compromised.
Semiconductor \'pulse stretchers\' go back to the mid 70\'s. Physical
iteration may still be the fastest way to implimentation for a
practical app, though a pencil and paper can cut this work down.
The simulation just eats man-hours.
RL
Spice is great. It lets a person play with ideas quickly, explore
hunches, get quantitative with the things that look promising.
Sometimes I design a circuit and understand it later, if ever.
https://www.youtube.com/watch?v=x6TrbD7-IwU
\"Intuition is the most important part of engineering.\"
\"The function of a simulator is to train your instincts.\"
I happened to be reading a bio on Richard Hamming today:
\"The purpose of computing is insight, not numbers.\"