Other Parts Discussed in Thread: TINA-TI, INA128, ,
Tool/software: TINA-TI or Spice Models
Hi.
I'm developing an ECG with a analog first stage. I mean, i'm using defibrillation protection circuitry, INA128 with G=6 and an anti-aliasing filter placed on 153 Hz.
1) Is it necessary to use the INA? I take several problems of understanding how can I amplify the differencial signal to generate the I, II and III derivations.
2) Now for ADS1298, for derivation I, should I put the single-ended output at the IN1P and the ground at the IN2N? And the same with II, that is, using IN2P and IN2N, generating III by software?
3) Is it applicable to use fully differential amplifiers? I never heard about this possibility but I know that the CMRR isn't desirable at all.
Best regards from Brazil. Thanks!