Investigate why a EEG or ECG device with a common rejection system is convinient.

Expert Solution

A EEG or ECG device with a common rejection system is convenient because to reduce common mode signals, it is necessary to use instrumentation amplifier having greater than 80?dB common mode rejection ratio( CMRR). This is important for high sound to noise ratio (SNR )signal

acquisition.

The performance of the bio-signal measurement system depends on the electrodes, electronic circuitry, and recording conditions. Choosing the correct electrode and successful electronic design strategy are essential to acquire EEG signals, properly.

In EEG recordings, as the other bio-signal measurements, one of the major problems is the 50 (or 60) Hz noise due to power lines. Between power lines and the subject there are capacitances . So to reduce the effect of surrounding signal a common rejection system having amplifier with higher CMRR is used.

Manojponduru answered 2 years ago

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