issue about electrocardiogram

4electros said:

Ron H said:

They have a free one-time download (I actually can't remember the exact restrictions). I downloaded it, but it was over a megabyte, so probably couldn't be attached. I didn't attempt to help the OP because the file quality was poor (photocopy), and because the question was much too general, considering the size of the document.

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if you want , i'll download file as part that means three or four attachmets to reduce the size but you said that the quality was poor so we won't gain anything of that..

may i give another suggestion?! we could discuss about each title or paragraph in that issue as its title that doesn't required you to see and read it.

your comments?!
best regards!

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I don't think discussing the entire article is realistic. Surely you understand some of it. Perhaps if you post the parts you don't understand (maybe one at a time, and redrawn), we could tackle that.

Ron H said:

I don't think discussing the entire article is realistic. Surely you understand some of it. Perhaps if you post the parts you don't understand (maybe one at a time, and redrawn), we could tackle that.

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you're right about discussing the entire article , it's not realisatic! actaully I've previously read the article and couldn't understand most of it but also I forgot most of what i've read :? so I have to read again then post here again.

thanks for your advise, with all my repects!

This writing from my issue:
(A two-electrode biopotential amplifier design is presented with a high
common mode rejection ratio(CMRR), HIGHT INPUT VOLTAGE TOLERANCE , and standard first-order high pass characteristic.)

i want to ask about CMRR why do we need it to be of high value or actually what's the purpose of instrumentational amplifier in biomedical science

(the most widely used circuits for biosignal amplifiers are based on the three-operational amplifier configuration, or instrumentaion amplifier, followed by additional AC-coupled stage)
(usually, the classic amplifier gain is split between the instrumentation amplifier and the stage after the high-pass decoupling filter. the first stage gain is set to low values , because of electrode polarisation potentials.)

i couldn't understand well , could we discuss about these subjects!

best regards!

**broken link removed** is an article that might help you. For the answer to your particular question, see page 82.