Skip to content

Instantly share code, notes, and snippets.

@ericfont

ericfont/circuit-20251113-1634.svg

Created November 13, 2025 21:32
Show Gist options

  • Select an option

    Learn more about clone URLs
  • Save ericfont/4493ab2e1aaeee619a72d1e919dee8b7 to your computer and use it in GitHub Desktop.

Select an option

Learn more about clone URLs
Save ericfont/4493ab2e1aaeee619a72d1e919dee8b7 to your computer and use it in GitHub Desktop.
Download ZIP
try with 10Mhz clocked flipflop
Display the source blob
Display the rendered blob
Raw
circuit-20251113-1634.svg
Loading
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
@ericfont
Copy link
Author

ericfont commented Nov 13, 2025

sim

not too good:
image

@ericfont
Copy link
Author

ericfont commented Nov 13, 2025

try 100Mhz clock:

https://www.falstad.com/circuit/circuitjs.html?ctz=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-04QA9gFfAE1TFomFJFrpVxWFfeh3zUGonUMJAsEcGoMDxDt+CEH8JD-AR6AQQCQAwbZeDEbgE0QNB1SEMDVDgmgsFoUc-yoLDaBYD8IHQoA

image

pwm out:
image

@ericfont
Copy link
Author

ericfont commented Nov 13, 2025

above oscillation is around 105kHz...the 90 kHz is a lower sideband.

@ericfont
Copy link
Author

ericfont commented Nov 13, 2025

opamp offset voltage, like schmit offset voltage, seems to simply manifest as a constant offset to final output:

pwm out:
image

filtered out:
image

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment