Electrocardiac signals obtained using flexible organic differential amplifier:
(A) Conventional single-ended amplifier
(B) Differential amplifier developed in this study
(C) Electrocardiac signals obtained from a walking subject. In the electrocardiac signals obtained using a conventional single-ended amplifier, large noise caused by walking is included in the waveform. In contrast, such noise is removed from the waveform obtained using the developed flexible organic differential amplifier.