A system comprising: a sound processor; a plurality of electrodes (112, 404); and a cochlear implant communicatively coupled to the sound processor and configured to apply electrical stimulation via one or more electrodes of the plurality of electrodes at one or more cochlear stimulation sites, the cochlear implant including a current generation circuit including one or more current sources (406, 410); a capacitor in series with the current generation circuit, and a voltage measurement circuit; wherein the sound processor is configured to direct the cochlear implant to enable the current generation circuit for a time interval, the enablement of the current generation circuit causing current to flow from the current generation circuit to the capacitor during the time interval, direct the cochlear implant to use the voltage measurement circuit to measure a voltage change across the capacitor that occurs during the time interval, and determine, based on the measured voltage change and on a duration of the time interval, a current level of the current that flows from the current generation circuit to the capacitor; and wherein the one or more current sources (406, 410) is/are connected to an electrode of the plurality of electrodes by way of an isolation switch and a DC blocking capacitor, which isolation switch is configured to be opened to prevent current from flowing to the electrode while the current generation circuit is enabled while an accuracy of the current generation circuit is being measured. a sound processor; a plurality of electrodes (112, 404); and a cochlear implant communicatively coupled to the sound processor and configured to apply electrical stimulation via one or more electrodes of the plurality of electrodes at one or more cochlear stimulation sites, the cochlear implant including a current generation circuit including one or more current sources (406, 410); a capacitor in series with the current generation circuit, and a voltage measurement circuit; a current generation circuit including one or more current sources (406, 410); a capacitor in series with the current generation circuit, and a voltage measurement circuit; wherein the sound processor is configured to direct the cochlear implant to enable the current generation circuit for a time interval, the enablement of the current generation circuit causing current to flow from the current generation circuit to the capacitor during the time interval, direct the cochlear implant to use the voltage measurement circuit to measure a voltage change across the capacitor that occurs during the time interval, and determine, based on the measured voltage change and on a duration of the time interval, a current level of the current that flows from the current generation circuit to the capacitor; and direct the cochlear implant to enable the current generation circuit for a time interval, the enablement of the current generation circuit causing current to flow from the current generation circuit to the capacitor during the time interval, direct the cochlear implant to use the voltage measurement circuit to measure a voltage change across the capacitor that occurs during the time interval, and determine, based on the measured voltage change and on a duration of the time interval, a current level of the current that flows from the current generation circuit to the capacitor; and wherein the one or more current sources (406, 410) is/are connected to an electrode of the plurality of electrodes by way of an isolation switch and a DC blocking capacitor, which isolation switch is configured to be opened to prevent current from flowing to the electrode while the current generation circuit is enabled while an accuracy of the current generation circuit is being measured.