Power systems with current regulation
AssigneeO2Micro, Inc.
InventorsLaszlo Lipcsei, Serban-Mihai Popescu, Sorin Hornet
Life of this patent
Estimating the term…
Abstract
A power system includes a current regulator coupled to a load and for generating an output current having a substantially constant ripple magnitude, and for adjusting the output current according to a sense signal indicative of the output current. In addition, the power system includes a filter element coupled in parallel with the load and for passing an AC (alternating-current) portion of the output current. Furthermore, the power system includes a current sensor coupled between ground and the parallel-coupled filtering element and load, and for providing the sense signal indicative of the output current.
Claims28
A power system comprising:
- a current regulator coupled to a load and for generating an output current having a substantially constant ripple magnitude, and for adjusting said output current according to a sense signal indicative of said output current;
- a filter element coupled in parallel with said load and for passing an AC (alternating current) portion of said output current;
- and
- a current sensor coupled between ground and said parallel-coupled filtering element and load, and for providing said sense signal.
A method for powering a load, comprising:
- generating an output current having a substantially constant ripple magnitude;
- passing an AC (alternating current) portion of said output current by a filter element coupled in parallel with said load;
- providing a sense signal indicative of said output current by a current sensor coupled between ground and said parallel-coupled filter element and load;
- and
- adjusting said output current according to said sense signal.
A display system comprising:
- a plurality of light sources for emitting a mixed color;
- an intensity controller coupled to said light sources and for generating an adjust signal based on a plurality of intensity control signals, and for controlling a hue of said mixed color according to said adjust signal;
- and
- a current regulator coupled to said intensity controller and light sources and for generating an output current having a substantially constant ripple magnitude, and for adjusting said output current based on said adjust signal.
The display system as claimed in claim 21, wherein said intensity controller further comprises a digital-to-analog converter coupled to said multiplexer and for converting said selected intensity control signal to said adjust signal.
Dependencies are inferred from the claim text.