Challenges of Physiological Signal Measurements Using Electrodes: Fudamentals to Understand the Instrumentation

When designing readout circuits for physiological signal measurement, one needs to understand that applications define the required signal quality and the circuit architecture. In addition, a clear understanding of electrode interface is as important as the circuit design since it is first and an integral part of the readout circuits. It is also necessary to be aware of signal aggressors so that they can be removed properly. The readout circuits are part of the overall system; therefore, various challenges and issues can be addressed in other parts of the system.