Method and apparatus for determining load current in a CPU...

Details Method and apparatus for determining load current in a CPU... Method and apparatus for determining load current in a CPU...

2007-09-11

2007-09-11

Laxton, Gary L (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

C323S284000

Reexamination Certificate

active

11078034

ABSTRACT:
An apparatus and method for measuring output current and power in real-time is provided for a CPU core powered by a DC-to-DC power converter having active voltage positioning. In an embodiment of the invention, a switched mode power converter comprises at least one power switch operatively coupled to an input voltage source, an output filter operatively coupled to the at least one power switch to provide an output voltage and output current to a load, and a control circuit coupled to the at least one power switch. The control circuit activates the power switch with a duty cycle controlled to regulate at least one of the output voltage and the output current. The control circuit receives a first control signal defining a desired value for the output voltage, a second control signal defining a relationship between voltage input and current draw for the load, and a voltage sense signal corresponding to an actual value of the output voltage. The control circuit thereby provides a measurement of load current.

REFERENCES:
patent: 6995549 (2006-02-01), Walters
patent: 7042203 (2006-05-01), Van Der Horn et al.
patent: 2005/0149770 (2005-07-01), Koertzen et al.

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