05531774 is referenced by 135 patents and cites 12 patents.

An implantable cochlear stimulator (ICS) has eight output stages (212), each having a programmable current source (212B) connected to a pair of electrodes, designated "A" and "B", through respective output coupling capacitors and an electrode switching matrix (212C). An indifferent electrode is connected to each output stage by way of an indifferent electrode switch (212D). An output mode register (208) controls the switching matrix of each stage, as well as the indifferent electrode switch, to configure the electrodes for: (1) bipolar stimulation (current flow between the pair of electrodes of the output stage), (2) monopolar A stimulation (current flow between the "A" electrode of the output stage and the indifferent electrode), (3) monopolar B stimulation (current flow between the "B" electrode of the output stage and the indifferent electrode), or (4) multipolar stimulation (current flow between the "A" or "B" electrode of one output stage and the "A" or "B" electrode of another output stage). The mode register is set by way of a command word, transmitted to the ICS from an external wearable system (10) as part of a data frame. The voltage at the "A" and "B" electrode of each output stage may be selectively telemetered to the wearable system, as may the current flow through the indifferent electrode, thereby facilitating a measurement of the electrode impedance. The "A" and "B" electrodes of each output stage may be selectively shorted through a high or low resistance in order to discharge the output coupling capacitors.

Title
Multichannel implantable cochlear stimulator having programmable bipolar, monopolar or multipolar electrode configurations
Application Number
411563
Publication Number
5531774
Application Date
October 12, 1994
Publication Date
July 2, 1996
Inventor
James H Wolfe
Canyon Country
CA, US
David I Whitmoyer
Los Angeles
CA, US
Primoz Strojnik
Granada Hills
CA, US
John C Gord
Venice
CA, US
Joseph H Schulman
Santa Clarita
CA, US
Agent
Fitch Even Tabin & Flannery
Assignee
Alfred E Mann Foundation For Scientific Research
CA, US
IPC
H04R 25/00
A61N 1/32
A61N 1/36
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