Now showing items 1-2 of 2

    • Multi-channel constant current source and illumination source 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Ji, Shu; Wu, Haoran (United States Patent and Trademark Office, 2013-12-03)
      A multi-channel circuit having respective channels powered through transformers having primary windings connected in series allows substantially equal constant currents to be provided through all channels by cross-regulation ...
    • Multi-channel two-stage controllable constant current source and illumination source 

      Virginia Tech Intellectual Properties, Inc.; Lee, Fred C.; Feng, Weiyi (United States Patent and Trademark Office, 2015-04-07)
      A multi-channel constant current source particularly suitable for driving an array of light-emitting diodes as an illumination apparatus provides a power source stage voltage regulator for providing a variable voltage using ...