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Battery protection and zero-volt battery recovery system for an implantable medical device

  • US 9,687,663 B2
  • Filed: 05/03/2011
  • Issued: 06/27/2017
  • Est. Priority Date: 12/07/2005
  • Status: Active Grant
First Claim
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1. A circuit for an implantable medical device, comprising:

  • a rechargeable battery with a battery terminal and a grounded terminal, the battery terminal configured to produce a battery voltage;

    a first charging path, wherein the first charging path comprises at least one first diode directly connected to a first node and the battery terminal, wherein the at least one first diode is forward biased along the first charging path from the first node to the battery terminal;

    a second charging path, wherein the second charging path comprises a gateable first switch configured to connect a second node to the battery terminal; and

    at least one second diode directly connected to the first node and the second node, wherein the at least one second diode is forward biased from the first node to the second node.

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