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@ericfont

ericfont/circuit-20251130-1655.svg

Created November 30, 2025 21:54
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opamp for lowpass in feedback
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circuit-20251130-1655.svg
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@ericfont
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ericfont commented Nov 30, 2025

sim

image

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ericfont commented Nov 30, 2025

add extra high freq RC

circuit-20251130-1711

hmmm...donno:

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ericfont commented Nov 30, 2025

back to just one opamp in feedback

circuit-20251130-1716

it is pretty good:

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ericfont commented Nov 30, 2025

comparator hysteresis was too glitchy...need to lower impedance of its feedback resistor...seems 1kohm feedback with 2k to Vmid provides for glitch-free transitions:

circuit-20251130-1818

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