Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means
Reexamination Certificate
2008-08-12
2011-10-18
Jackson, Stephen W (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Load shunting by fault responsive means
Reexamination Certificate
active
08040645
ABSTRACT:
A protection system implemented on one die of a multi-die package provides a discharge path for excess voltages incurred on one or more other die of the package. Ground paths are provided for certain circuitry in the package that have high noise-sensitivity, and ground paths are provided for certain circuitry in the package that have low noise-sensitivity relative to the high noise-sensitivity circuitry. The grounds of high noise-sensitivity circuitry of multiple die are shorted together, resulting in a common high noise-sensitivity ground. The grounds of low noise-sensitivity circuitry of multiple die are shorted together, resulting in a common low noise-sensitivity ground. A pre-designated removable path is included on the package external to the die, which shorts the common high noise-sensitivity ground and the common low noise-sensitivity ground. The removable path may be removed during manufacturing, if noise present on the shorted grounds results in unacceptable performance degradation.
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International Search Report & Written Opinion—PCT/US2009/053548, International Search Authority—European Patent Office—Nov. 11, 2009.
Dundigal Sreeker
Jalilizeinali Reza
Mohan Vivek
Gallardo Michelle
Jackson Stephen W
Pauley Nicholas J.
QUALCOMM Incorporated
Velasco Jonathan
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