BMIN-DC
Joined: 27 Oct 2009
Posts: 1
Location: canada
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 27 Oct 2009 19:15 ECG schematic design |
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hi. can anyone show or explain to me how to design a 1mv pulse, lead selector switch, lead fault indicator, preamp isolation, dc offset, analog to digital conversion, diagnostic /monitoring modes, heart rate meter, peak detector or upper and lower alarm limits for an ecg.  any help would be great
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amalarus
Joined: 05 Nov 2009
Posts: 1
Location: Ca
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05 Nov 2009 22:05 Re: how to design 1mv pulse, lead selector-ECG schematic des |
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bumping this topic for further input. from the perspective of another fellow designer of an ecg project.
i will suggest simply coming up with a hardwire design for lead selection using a rotary switch. i'm sure you are aware of this method. IC seems very unnecessary if that's what you are considering.
presumably you'd want to use a comparator for the peak detection triggering at the amplitude of the R wave, obviously same for fault detection and alarms.
feed your peak detection to beats/min, but what would we use here?
what do you mean by preamp isolation? buffering the bioelectric signal, voltage protection?
i'm at an in-pass with dc offset, it's relatively easy to design by adjusting your offset voltage, however using a pot seems problematic in regards to adjusting above and below our reference point.
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