Dear TI experts:
Hi, I'm designing an wearable sensor for ECG detection.
I want to measure 2-electrode ECG and respiration without a third electrode.
I connected RLDOUT after the input ac-coupling capacitors with resistors to cancel common-mode voltage.
And, I placed RC filter on the channel input to reject common-mode voltage and high-frequency noise.
1. I'm not sure this RLD buffer can cancel the common-mode voltage on both ECG and respiration channels.
2. I want to know how to decide the values of R3 and R4 resistors.
3. Are R2 and R6 necessary to protect patient? There is already R1 and R5.
Here is my schematic:
If you have additional recommendations, please notice me.
Best regards,