The invention relates to a receiver device (D6) with an intracorporeal current (Id), comprising means (IE2, 0E2) for collecting, by means of capacitive coupling, an alternating signal based on a current that has crossed all or part of the body of a subject, means (40, 100) for extracting data from the collected alternating signal, and means (40, 100) for extracting, from the alternating signal, a biological signal (BS) generated by the body of the subject and modulating the amplitude of the alternating signal.