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L67GS
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Re: Off Topic Banter

Post by L67GS »

mctom wrote:
Sun Jun 19, 2022 7:27 am

a resistor, a capacitor, and another resistor, all in series.
Trial and error noise filter?

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Post by mctom »

Probably trial and error AC coupling, but indeed it looks like something they copied over without giving it much thought.

Huh, by the way I learned what this instrument is even for. I knew it was some sort of medical device, but I wasn't aware it was specifically for diagnosis of .. sleep apnea.
Isn't it ironic? Perhaps I'll just have one unit as a payment :lol:
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Post by mad_ady »

You can get one, but you won't be sleeping well, thinking what those components are supposed to do...

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Last night I couldn't sleep thinking how uncomfortable this must be for belly sleepers. It's strapped right on a patient's chest, because it does ECG as well.
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L67GS
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Re: Off Topic Banter

Post by L67GS »

That could potentially help to smooth out a wave, like help pwm look more like a sine.

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Re: Off Topic Banter

Post by mctom »

L67GS wrote:
Wed Jun 22, 2022 5:10 am
That could potentially help to smooth out a wave, like help pwm look more like a sine.
Perhaps my circuit description wasn't clear , but that's definitely a high pass filter. AKA "AC Couple" because it doesn't pass DC at all. :)
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