Regulation of electrical current through a resistive load

Details Regulation of electrical current through a resistive load Regulation of electrical current through a resistive load

2006-06-12

2010-11-09

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S224000, C315S247000

Reexamination Certificate

active

07830101

ABSTRACT:
In one embodiment, an electrical system having an LED array, a first current source connected to provide a first current to the LED array, a current-sense resistor connected to the LED array, a second current source connected to provide a second current to the current-sense resistor, a control processor, and a voltage sensor adapted to provide a corresponding sensor signal to the control processor, wherein the control processor is adapted to control the first and second current sources based on the sensor signal. The first current source having a diode with first and second sides, an inductor connected between a first reference voltage source and a first side of a diode, a capacitor connected between a second side of the diode and a second reference voltage, and a transistor connected between the first side of the diode and the second reference voltage.

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