EMG signal acquisition

Anonymous · ‎Apr 22, 2015

hello every one,

I want to know exactly what i have to put like a parameter in the Instrumentation amplifier to get a signal in the output .

i specify that i use a mesure of biceps muscle .

so please help me gays

DennisS_46 · ‎Apr 22, 2015

First you have to know the size of your signal. ECG signals are in the range of 0.5 to 2.0 Vpp. EMG signals are ususally smaller.

Set your PGAs gain of 50. Don't use the differential to single ended converter. The system will work better if you go directly from the PGA outputs to the differential input of a 16 bit ADC_Delsig. You will almost certainly want to put two or three poles of passive filter on the inputs to set a band limit to a few hundred Hz. The pole locations should be carefully matched in order to preserve the common-mode rejection. At EMG frequencies (less than 100 Hz), the signal filtering (after the input filtering) is best done in software, not analog hardware.

---- Dennis, PSoC Apps

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EMG signal acquisition

EMG signal acquisition

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