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Demultiplexer circuit for neural stimulation

United States Patent

October 9, 2012
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A demultiplexer circuit is disclosed which can be used with a conventional neural stimulator to extend the number of electrodes which can be activated. The demultiplexer circuit, which is formed on a semiconductor substrate containing a power supply that provides all the dc electrical power for operation of the circuit, includes digital latches that receive and store addressing information from the neural stimulator one bit at a time. This addressing information is used to program one or more 1:2.sup.N demultiplexers in the demultiplexer circuit which then route neural stimulation signals from the neural stimulator to an electrode array which is connected to the outputs of the 1:2.sup.N demultiplexer. The demultiplexer circuit allows the number of individual electrodes in the electrode array to be increased by a factor of 2.sup.N with N generally being in a range of 2-4.
Wessendorf; Kurt O. (Albuquerque, NM), Okandan; Murat (Edgewood, NM), Pearson; Sean (Albuquerque, NM)
Sandia Corporation (Albuquerque, NM)
12/ 502,698
July 14, 2009
GOVERNMENT RIGHTS This invention was made with Government support under Contract No. DE-AC04-94AL85000 awarded by the U.S. Department of Energy (DOE), and under cooperative research and development agreement (CRADA) No. ORNL01-0625 with Second Sight Medical Products, Inc. The Government has certain rights in the invention.