Calibration of current sources and sinks in a stimulating medical device

摘要

A stimulating medical device, comprising a plurality of electrodes, and a current source and a current sink connected to each one of the electrodes. The medical device also comprises a calibration arrangement configured to compare the current provided by a selected one of the current sources to the current sunk by a selected one of the current sinks, and configured to adjust an operational parameter of at least one of the source and sink based on said comparison such that the current provided by the selected current source is substantially the same as the current sunk by the current sink.

主权项

1. A stimulating medical device, comprising:
a plurality of electrodes; a plurality of current sources and a plurality of current sinks, wherein each one of the electrodes is connected to at least one of the plurality current sources and to at least one of the plurality of current sinks; a calibration arrangement configured to compare the current sourced by a selected one of the plurality of current sources to the current sunk by a selected one of the plurality of current sinks; and a processor configured to:
based on the comparison, iteratively adjust an operational parameter of either the selected current source or the selected current sink until the current sourced by the selected current source is substantially the same as the current sunk by the selected current sink, andstore a value representing an amount by which the operational parameter of the either the selected current source or the selected current sink was adjusted to make the sourced and sunk currents substantially the same.