Timeline for Convert CMOS-level signal to microphone-level (0..3V --> -1..+1V)?
Current License: CC BY-SA 4.0
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| Oct 10, 2018 at 11:42 | comment | added | anrieff | True then, my idea wouldn't work in this case. I'm not really sure, but I think you won't get by without having a negative rail (think TC7660 + negative LDO, to get the -1V rail). The +1V rail is easy. The level shifting part is easy too, as you don't need analogue level shifting, just two levels (so something akin to a CMOS inverter placed on the ±1V rails would work). There might be an IC that does all this, I don't recall any, but you might want to look around first. | |
| Oct 8, 2018 at 20:52 | comment | added | iter | Thank you, anrieff. I can remove the DC bias in my own software, but I have no control over the software the clients use. I don't know how well third-party packages in this space deal with DC offset at the start of the recording. It may be worth investigating, but ideally, I'd simply produce a clean signal in the first place. | |
| Oct 8, 2018 at 20:27 | history | answered | anrieff | CC BY-SA 4.0 |