Bruce Swanson

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Today's chip designs are getting smaller and bigger. Feature sizes are moving into nanometer geometries, and gate counts are pushing towards the 100M gate mark. Semiconductor companies creating these nanometer designs are struggling with many issues that result from this shrinking yet increasingly complex design environment. One issue growing in importance(More)
With the advent of nanometer technologies, the design size of integrated circuits is getting larger and the operation speed is getting faster. As a consequence, test cost is becoming unbearable with traditional test methods. The big challenge for design and test engineers is how to guarantee the required high levels of test quality and yield while keeping(More)
Copublished by the IEEE CS and the IEEE CASS September–October 2003 17 IC MANUFACTURING TEST is changing, with an increased emphasis on at-speed testing to maintain test quality for larger, more complex chips and new fabrication processes. Growing gate counts and increasing timing defects with small fabrication technologies force improvements in test(More)
A fusion enzyme consisting of UDP-galactose 4-epimerase and galactose-1-P uridylyltransferase with an intervening Ala3 linker was constructed by in-frame fusion of E. coli gene galT to the 3'-terminus of the E. coli gene galE that had been extended with the coding sequence for three alanine residues, all contained within a high-expression plasmid. The(More)
The role of lysine 153 in the action of UDP-galactose 4-epimerase from Escherichia coli has been investigated by site specific mutagenesis and kinetic and spectrophotometric analysis of the mutant enzymes. The crystal structure of UDP-galactose 4-epimerase shows that the binding of NAD+ to the coenzyme site includes the hydrogen bonded interaction of the(More)
Cytochrome P-450cam reacts with phenyldiazene (PhN = NH), or less efficiently with phenylhydrazine, to give a catalytically inactive complex with an absorption maximum at 474 nm. The prosthetic group extracted anaerobically from the inactivated protein has the spectroscopic properties of a sigma phenyl-iron complex and rearranges, on exposure to air and(More)
The reactions of cytochromes P450 IA1, IIB1, IIB2, and IIE1 with phenyldiazene yield complexes with absorption maxima at either 474 or 480 nm. Anaerobic extraction of the prosthetic group from the phenyldiazene-treated proteins followed by its exposure to oxygen and strong acid produces an equal mixture of the four possible N-phenylprotoporphyrin IX(More)
In order to generate correct at-speed scan patterns, the effect of timing exceptions and constraints needs to be considered during test generation. A path-oriented approach to handle timing exception paths during atspeed ATPG has been presented in [1][2]. The new method has been applied to and tested on many example circuits at Semiconductor Technology(More)