Concerned about Microsoft Windows 11 Recall? You should be.
Recall allows Microsoft’s Windows 11 Copilot+ devices to screenshot every action a person takes on their PC.
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one hundred internet points if you can successfully guess what this circuit does, and how.
three hints:
1: it's pretty weird.
2. the inputs and outputs are no more than a couple tens of kilohertz (and are not a fixed frequency - the values shown in the sim below are arbitrary)
3: it only works in a real circuit and if you simulate this you will not see it doing the weird thing.
UPDATE: we have a winner. solution is here: https://chaos.social/@gsuberland/113921571918206983
I'm not even sure how to properly describe this. "nonlinear modulating low-pass filter", I guess? the core of it is that the MOSFET is a big power FET with a ton of Cgs. combined with the 220k resistor, you get a low-pass filter. the channel A voltage is adjusted to keep the MOSFET sub-threshold. except the really evil part of this is that the MOSFET's gate capacitance is dependent on Vds. so channel B modulates Vds, adjusting the filter's cutoff frequency.
AwattoAnalog
Star Trek Minus Context
nixCraft 🐧
Graham Sutherland / Polynomial
Tom Gauld
Anatoly Shashkin💾
b-rain
Riker Googling
never obsolete