EMG3

Gain and filters sections:

front end

• subject protection is via 100K resistors on the 3 signals
• 3.3KHz differential filter, 16KHz common mode filter
• instrumentation amp with gain of 25, referenced to common

==first output stage

• 16 Hz high pass
• 300 Hz, 2nd order active LP with gain of 10.5
• stage output through 2K resistor and 800 Hz LP. 0.1uF bypass across output. Total gain 262x

==2nd output stage

• output of 2nd order LP goes to 16 Hz high pass
• followed by gain of 11 amplifier
• state output through 2K resistor and 800 Hz LP. 0.1uF bypass across output. Total gain ~2900x - resulting in +-9V EMG signals.