Biometric analysis using multipurpose electrodes

A system for biometric analysis, the system comprising:

• a wearable device being configured to be worn on a wrist of a user, the wearable device comprising:
• a hub, the hub comprising a wrist-facing surface;
• a plurality of electrodes disposed on the wrist-facing surface;
• and
• a gesture control processing circuit, the gesture control processing circuit being configured to receive and process biopotential signals from a plurality of channels defined by the plurality of electrodes and to convert the received biopotential signals to biopotential data for use in gesture control;
• an electrocardiogram (ECG) processing circuit, the ECG processing circuit being configured to generate ECG data for use in analyzing a user's heart rhythms;
• wherein the plurality of electrodes comprises at least one common electrode configured to provide signals to both the gesture control processing circuit and the ECG processing circuit;
• wherein the system is configured to:
• at a first time, enter a gesture control state;
• while the system is in the gesture control state, obtain first biopotential signals using at least the common electrode, transmit the first biopotential signals to the gesture control processing circuit, and convert the first biopotential signals to first biopotential data for use in gesture control;
• at a second time, transition from the gesture control state to an ECG state;
• and
• while the system is in the ECG state, obtain second biopotential signals using at least the common electrode, transmit the second biopotential signals to the ECG processing circuit, and convert the second biopotential signals to ECG data for use in analyzing a user's heart rhythms;
• wherein in the gesture control state, the common electrode is paired with a second electrode to obtain the first biopotential signals for transmission to the gesture control processing circuit;
• and
• wherein in the ECG state, the common electrode is paired with a third electrode to obtain the second biopotential signals for transmission to the ECG processing circuit.