The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 2014
Filed:
Jun. 30, 2010
Paul Delucia, Baldwinsville, NY (US);
Paul Delucia, Baldwinsville, NY (US);
Welch Allyn, Inc., Skaneateles Falls, NY (US);
Abstract
A drive circuit for a light emitting diode, and applications thereof, are disclosed. In one example, the drive circuit includes an input voltage and a ground, and a current control block including a voltage supply connection, a ground connection, a first voltage sense connection, and a second voltage sense connection. The voltage supply connection electrically connects to the input voltage and the ground connection connected to the ground. The drive circuit includes a current sense resistor connected to the first voltage sense connection, a first current adjustment resistor connected between the current sense resistor and the second voltage sense connection, and a second current adjustment resistor connected between the second voltage sense connection and the input voltage. A light emitting diode can connect from a point between the current sense resistor and the first current adjustment resistor to the ground.