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Efficient dynamic stimulation in an implanted device

  • US 8,423,132 B2
  • Filed: 12/11/2003
  • Issued: 04/16/2013
  • Est. Priority Date: 12/12/2002
  • Status: Active Grant
First Claim
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1. Apparatus for stimulating tissue having a capacitance, comprising:

  • charge circuitry which is adapted to apply a stimulation current to the tissue, causing a voltage to develop across the capacitance of the tissue; and

    discharge circuitry which is adapted to inject a discharge current to the tissue so as to discharge the capacitance, such that, while the discharge current is being injected into the tissue, a value of the discharge current is substantially independent of the voltage across the capacitance,the discharge circuitry being adapted to measure the voltage across the capacitance, and to halt injection of the discharge current to the tissue when the voltage is substantially zero.

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