Post History
CMRR design is key to rejecting grid e-fields that impose noise onto EMG, EKG,EEG amplifiers. This includes all series Zs of cable balance and Amp CMRR. For this reason >100 dB CMRR are requ...
Answer
#2: Post edited
by
TonyStewart
·
2023-08-29T00:37:07Z (over 1 year ago)
- CMRR design is key to rejecting grid e-fields that impose noise onto EMG, EKG,EEG amplifiers. This includes all series Zs of cable balance and Amp CMRR. For this reason >100 dB CMRR are required using INA's and not OA's with 1% R's (-40dB error).
The same CMRR matching is required on 60/50 Hz LPF components on the signal conditioners.
- CMRR design is key to rejecting grid e-fields that impose noise onto EMG, EKG,EEG amplifiers. This includes all series Zs of cable balance and Amp CMRR. For this reason >100 dB CMRR are required using INA's and not OA's with 1% R's (-40dB error).
- The same CMRR matching is required on 60/50 Hz LPF components on the signal conditioners.
- RLD feedback is commonly used to improve CMRR by creating a virtual ground from CM signal error feedback.
#1: Initial revision
by
TonyStewart
·
2023-08-29T00:35:29Z (over 1 year ago)
CMRR design is key to rejecting grid e-fields that impose noise onto EMG, EKG,EEG amplifiers. This includes all series Zs of cable balance and Amp CMRR. For this reason >100 dB CMRR are required using INA's and not OA's with 1% R's (-40dB error). The same CMRR matching is required on 60/50 Hz LPF components on the signal conditioners.