Data processing: measuring – calibrating – or testing – Testing system – Of circuit
Reexamination Certificate
2000-12-13
2003-06-03
Assouad, Patrick (Department: 2857)
Data processing: measuring, calibrating, or testing
Testing system
Of circuit
C713S340000
Reexamination Certificate
active
06574577
ABSTRACT:
BACKGROUND
The invention generally relates to a circuit to indicate the status of a supply voltage.
A typical computer system includes a power supply that provides and regulates various supply voltages that are used by the components of the computer system. As examples, the computer system may provide and regulate supply voltages for 5 volt (V), 3.3 V, 2.5 V, 1.8 V and 1.5 V supply lines, or power planes, of the computer system.
One component that receives supply voltages from the voltage planes of the system is a microprocessor. The microprocessor may be encoded with a voltage identification (VID) number, a number that identifies a specific supply voltage to be furnished to the core circuitry of the microprocessor. In this manner, at powerup of the computer system, circuitry of the microprocessor other than its core circuitry may receive a supply voltage for purposes of communicating an indication of the VID number to an external voltage regulator. This voltage regulator then generates the supply voltage for the core circuitry of the microprocessor based on the indicated VID number.
REFERENCES:
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Intel VRM 8.3 DC-DC Converter Design Guidelines cited by Voit (′180 B1) above with filing date Feb. 26, 1999.
Boland Bernard W.
Dickerson John A.
Olsen Jeffery J.
Stapleton Michael A.
Assouad Patrick
Intel Corporation
Trop Pruner & Hu P.C.
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