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LED drive circuit and method for using same

  • US 8,708,900 B2
  • Filed: 01/25/2013
  • Issued: 04/29/2014
  • Est. Priority Date: 12/26/2007
  • Status: Active Grant
First Claim
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1. An LED drive circuit for a medical device comprising:

  • a first current mirror configured to supply a first current to activate a first LED of a sensor, wherein the first current mirror comprises a plurality of transistors, wherein one of the transistors of the first current mirror is coupled to a DAC output of a microcontroller.

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