Method and apparatus for soft start power gating with automatic voltage level detection

A method and apparatus for selectively charging a secondary voltage rail includes selectively and partially charging a secondary voltage rail using at least one soft start power gate switch and using an initial power control indicator. The partially charged secondary voltage rail is selectively char...

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Bibliographic Details
Main Authors ROWHANI OMID, ROSS VINCENT
Format Patent
LanguageEnglish
Published 06.09.2011
Subjects
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PHYSICS
PULSE TECHNIQUE
SEMICONDUCTOR DEVICES
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Summary:A method and apparatus for selectively charging a secondary voltage rail includes selectively and partially charging a secondary voltage rail using at least one soft start power gate switch and using an initial power control indicator. The partially charged secondary voltage rail is selectively charged, using at least one main power gate switch, based on the initial power control indicator and a detected voltage on the secondary voltage rail. When the initial power control indicator is in a state representative of an initial power up command and when the detected voltage is greater than or equal to a predetermined voltage level, at least one main power gate switch is closed thereby charging the secondary voltage rail.
Bibliography:Application Number: US20060469153