Hi everybody!
I have to design ECG monitor for my study and I have the same circuit like KEANE2097 so i will attach it to post one more time for comfort.
1)So, how i have understood somehow 1-2mV ECG RA and LA differential signal have been centred to 2.5V and then go to A1, A2, A3 and A4 amplifiers. If is it so could somebody explain me where does this happen in circuit? In INA326? Then i do not understand how.
2)i counted the amplification coefficient for A3 part and made calculation for F0 frequency (which should be 100 Hz from picture) by my own and i got cut off frequency F=43.73Hz. By cut off frequency i think frequency when K=0.707Kmax (how i understand this frequency should characterise filter) . Where is mistake?
i attached my calculation and ina326 data-sheet
i would be grateful for any advise !
I have to design ECG monitor for my study and I have the same circuit like KEANE2097 so i will attach it to post one more time for comfort.
1)So, how i have understood somehow 1-2mV ECG RA and LA differential signal have been centred to 2.5V and then go to A1, A2, A3 and A4 amplifiers. If is it so could somebody explain me where does this happen in circuit? In INA326? Then i do not understand how.
2)i counted the amplification coefficient for A3 part and made calculation for F0 frequency (which should be 100 Hz from picture) by my own and i got cut off frequency F=43.73Hz. By cut off frequency i think frequency when K=0.707Kmax (how i understand this frequency should characterise filter) . Where is mistake?
i attached my calculation and ina326 data-sheet
i would be grateful for any advise !
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