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feat: update project tt_um_wokwi_414121715329142785 from schoeberl/tt…
…09-sigma-delta Commit: 8d45b556dddb8096c0340936e6a9faf639c04ead Workflow: https://github.com/schoeberl/tt09-sigma-delta/actions/runs/11764051619
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,41 +1,39 @@ | ||
| <!--- | ||
| This file is used to generate your project datasheet. Please fill in the information below and delete any unused | ||
| sections. | ||
| ## How it works | ||
|
|
||
| You can also include images in this folder and reference them in the markdown. Each image must be less than | ||
| 512 kb in size, and the combined size of all images must be less than 1 MB. | ||
| --> | ||
| Provide an analog signal at Vin (e.g., some music) and listen to the output at Vout (using an amplifier). | ||
| The circuit will probably add some noise, as it is very crude. But it went from the analog domain to digital | ||
| and then back. | ||
|
|
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| ## How it works | ||
| Future work should be to use that sigma-delta coded signal to do some fun audio processing. | ||
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| Converting an analog signal to a pulse duration modulated digital signal | ||
| Anyone knowing how to do DSP in the sigma-delta domain? | ||
|
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| ## How to test | ||
| Connect an analog source to your design. | ||
| Connect an analog source to your design and listen to the music (output). | ||
|
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| ## External hardware | ||
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| This is a sigma-delta AD converter and a DA converter. | ||
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| The input is mixed with the feedback delay/inversion and uses the threshold of the DFF input as a comparator, serving as a single bit ADC. | ||
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| The R and C values depend on the input signal and can be discussed and should be explored. | ||
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| ``` | ||
| sigma delta AD converter | ||
| without external comparator: | ||
| input threshold of the DFF input is used as comparator | ||
| (not very exact but only 3 external components) | ||
| 100k | ||
| ___ | ||
| OUT0 o--|___|--+ | ||
| | | ||
| 100k | | ||
| ___ | | ||
| Vin o--|___|--o----------o IN0 | ||
| | | ||
| --- | ||
| --- 100n | ||
| | | ||
| | | ||
| --- | ||
| - | ||
| ___ | ____ | ||
| Vin o--|___|--o----------o IN0 OUT1 o----|____|---o--------o Vout | ||
| | | | ||
| --- --- | ||
| --- 100n --- | ||
| | | | ||
| | | | ||
| --- --- | ||
| - - | ||
| ``` |
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