Boots – shoes – and leggings
Patent
1993-02-05
1996-03-05
Chan, Eddie P.
Boots, shoes, and leggings
364DIG1, 3642449, 326 38, 371 222, G06F 1310
Patent
active
054974755
ABSTRACT:
A configurable integrated circuit includes a first register having N EPROM cells, and a second register having N EPROM cells, each EPROM cell in the second register corresponding to a distinct one of the N EPROM cells in the first register. Register programming circuits store a set of N binary configuration values in the first register and store boolean complements of the N binary configuration values in the second register. N configuration value sensing circuits are used to read the EPROM cells and generate N configuration signals. Each configuration value sensing circuit is a set/reset latch coupled to one EPROM cell in the first register and the corresponding EPROM cell in the second register. Under normal operating conditions, the latch generates a configuration signal corresponding to the configuration value stored in the one EPROM cell in the first register. A strengthening circuit protects the sensing circuit from alpha particle radiation by applying a strengthening current to each latch after the latch has already reached a stable state. The configurable integrated circuit has a multiplicity of configurable circuits, each configurable circuit having at least one transistor that receives at least one of the N configuration signals and configures the configurable circuit in accordance therewith.
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Chan Eddie P.
National Semiconductor Corporation
Nguyen Hiep T.
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