Adaptive bus voltage positioning for two-stage voltage...

Details Adaptive bus voltage positioning for two-stage voltage... Adaptive bus voltage positioning for two-stage voltage...

2007-01-09

2007-01-09

Easthom, Karl (Department: 2838)

Electricity: power supply or regulation systems

Output level responsive

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

C323S282000

Reexamination Certificate

active

10781931

ABSTRACT:
Alteration of voltage input to a voltage regulator output stage from a Vbusregulator stage in a two-stage voltage regulator provides optimal Vbusvoltage placement for a wide range of current loads to increase voltage regulator efficiency and is particularly suited to CPUs having power-saving sleep modes of operation. An optimal voltage is selected or developed in response to information concerning operational mode or current consumption of the powered device. As a perfecting feature of one embodiment of the invention in which a discrete Vbusvoltage is selected based on operational mode, the selected voltage is adjusted to further optimize the matching of the Vbusvoltage placement to the load and provides a continuous range of voltages. In a second embodiment the entire Vbuspositioning function is performed in response to current load information. A feed-forward arrangement is provided to avoid transient spikes as the Vbusvoltage placement is altered.

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Paul Kingsepp, Powering carrier-grade systems, Jun. 2001, CompactPCI Systems.

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