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Current control for electrotransport drug delivery

  • US 8,428,709 B1
  • Filed: 06/11/2012
  • Issued: 04/23/2013
  • Est. Priority Date: 06/11/2012
  • Status: Expired due to Fees
First Claim
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1. An electrotransport drug delivery system having a constant current supply, the system comprising:

  • a power source;

    a first patient contact connected to power source;

    a second patient contact connected to a current control transistor; and

    a sensing circuit configured to measure voltage at the transistor, wherein the sensing circuit is configured to provide feedback controlling power at the first patient contact, wherein the second patient contact is connected to the sensing circuit only through the current control transistor so that the second patient contact is electrically isolated from the sensing circuit.

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