Multi-path power switch scheme for functional block wakeup
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United States of America Patent
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Jul 22, 2014
Grant Date -
May 2, 2013
app pub date -
Oct 31, 2011
filing date -
Oct 31, 2011
priority date (Note) -
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Abstract
A multi-path power switch scheme for functional block wakeup is disclosed. The scheme may be applied to functional blocks of an integrated circuit. When a power on procedure is initiated within a given functional block, a first group of power switches in a functional block may be powered on, while a second group of power switches is inhibited from powering on. After a predetermined time has elapsed, activation of the second group of power switches is initiated. After initiation of a power up procedure for a given functional block, the powering up of a second functional block to be powered on may initially be inhibited. After a predetermined time has elapsed, the powering on of the second functional block may be initiated. Overlap between times when the first and second groups of switches are active may depend on process, voltage, and temperature variations.
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