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@ericfont

ericfont/circuit-20251211-1807.svg

Created December 11, 2025 23:11
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delta + DSM
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ericfont commented Dec 12, 2025

if apply a simple-moving average with the null point being 275kHz:

image

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ericfont commented Dec 12, 2025 •
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if instead null multiples of 200kHz:

sinc1:
image

sinc2:
image

sinc3:
image

sinc4:
image

sinc5:
image

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ericfont commented Dec 12, 2025

Possibly the lowpass enveloped matched an integrator in low freqs, then wouldn't need to apply integrator again. Maybe a lower null would match it better.

Could send raw pulse widths or could downsample before transmitting.

To do a DAC from 40kHz first could zero expand to 200kHz, and then could simulate the circuit digitally, which would generate a PWM that could then in analog domain be integrated.

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