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fast CC/CV power supply take two

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T3sl4co1l:
That's rather cryptic.  Could you provide a little more information or background on that?  Unqualified, "pre" "main" and "post" could be anything: any ratings, any connection.  It's also not clear if it would be a specifically digital solution, or at all amenable to analog function.  At the least, it doesn't sound like it needs to be reactive -- high speed digital signals transmit into controlled impedance and that's it, if the impedance is lumpy your signal is lumpy, end of story; whereas this circuit is intended to respond in a very specific way to different load conditions.

Tim

luudee:

--- Quote from: T3sl4co1l on October 05, 2023, 03:22:15 am ---That's rather cryptic.  Could you provide a little more information or background on that?  Unqualified, "pre" "main" and "post" could be anything: any ratings, any connection.  It's also not clear if it would be a specifically digital solution, or at all amenable to analog function.  At the least, it doesn't sound like it needs to be reactive -- high speed digital signals transmit into controlled impedance and that's it, if the impedance is lumpy your signal is lumpy, end of story; whereas this circuit is intended to respond in a very specific way to different load conditions.

Tim

--- End quote ---

Hi Tim,

yeah sorry, I know it is a bit cryptic, lol.

Basically you have 3 drivers, first one and last one are "weak".

To turn on a signal (drive to logical '1'), you first engage the pre-driver, then the
main driver. The idea is that the pre-driver will charge up the line and prevent
overshoot.

To turn off the signal, you disable the main driver and enable the post-driver,
before disabling it as well. The idea here is to avoid undershoots.

It's a little bit of both digital and analog, but then at 56Ghz, nothing is digital nor
analog any longer, lol

Best Regards,
rudi

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