Non-Contact Electrocardiogram Dry Electrode Design

We present a gel-free, non-contact dry electrode based on a PCB for electrocardiogram(ECG) recording. We designed the electrode as a 1.5-inch round plate. The fabricated electrode has an amplifier with low power consumption and high-impedance input and a high-frequency filter circuit. Integrated circuit of the fabricated electrode can reduce noise pickup and increase gain. Through this experiment we compared the ECG obtained from a disposable wet electrode and the ECG obtained from dry electrode, and both of all can see clear ECG recorded signals.