Implantable Stimulator Device Having Small DC-Blocking Capacitors
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United States of America Patent
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Issued Date -
May 26, 2016
app pub date -
Oct 9, 2015
filing date -
Oct 9, 2015
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Abstract
Improved circuitry for an Implantable Pulse Generator (IPG) is disclosed that allows much smaller-value DC-blocking capacitors to be used with supported electrodes—with capacitance values orders of magnitude smaller than those used in traditional IPGs. Such improved circuitry operates by alternating the direction of the current through the DC-blocking capacitor during the provision of a therapeutic current pulse. Such smaller-value DC-blocking capacitors do not take up significant space in the IPG, or surface area on the IPG's PCB. Additionally, the improved circuitry includes the ability to measure the current amplitude provided to selected electrodes—for example, to ensure that the sources are actually providing a prescribed current amplitude to the patient's tissue—and to provide for perfect active charge recovery.
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