David L. Harris

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Domino circuits are widely used in high-performance CMOS microprocessors. However, textbook domino pipelines suffer significant timing overhead from clock skew, latch delay, and the inability to borrow time. To eliminate this overhead, some designers provide multiple overlapping clock phases such that domino gates are always ready for evaluation by the time(More)
SRT dividers are common in modern floating point units. Higher division performance is achieved by retiring more quotient bits in each cycle. Previous research has shown that realistic stages are limited to radix-2 and radix-4. Higher radix dividers are therefore formed by a combination of low-radix stages. In this paper, we present an analysis of the(More)
OBJECTIVES To develop a psychometrically robust and widely applicable short form of the Derriford Appearance Scale, (DAS59), which (1) will reliably and validly assess the distress and difficulties experienced in living with problems of appearance, (2) is acceptable to clinical and non-clinical populations, and (3) facilitates research and clinical(More)
Aesthetic plastic surgery has been long practiced for primarily psychological rather than physical benefit to patients. However, evaluation of the psychological impact of aesthetic plastic surgery has often been of limited methodological rigor in both study design and appropriate measurement. This study is intended to evaluate the psychological impact of(More)
Clock skew is an increasing concern for high-speed circuit designers. Circuit designers use transparent latches and skew-tolerant domino circuits to hide clock skew from the critical path and take advantage of shared portions of the clock network to budget less skew between nearby elements than across the entire die, but current timing analysis algorithms(More)
A coustic energy can precisely and accurately eject a droplet of liquid from a reservoir, enabling delivery of picoliter and nanoliter volumes low nanoliter volumes between microplates using focused acousticsdautomation considerations. Acoustic droplet ejection has been shown to be extremely precise (coefficients of variation !2%) over a wide range of(More)
This letter demonstrates optical 3R regeneration in 10-Gb/s nonreturn-to-zero field transmission. The 3R regenerator utilizes semiconductor-optical-amplifier-based Mach–Zehnder interferometer wavelength converters, a synchronous modulator, and a Fabry–Pérot filter to realize optical 3R regeneration including all-optical clock recovery. The cascadablity of(More)
Masaki Funabashi, Zuqing Zhu, Zhong Pan, Bo Xiang, and S. J. B. Yoo Department of Electrical and Computer Engineering, University of California, Davis, CA 95616, USA Email: yoo@ece.ucdavis.edu David L. Harris Advanced Technology Labs, Sprint, Burlingame, CA 94010, USA Email: david.l2.harris@sprint.com Loukas Paraschis Optical Networking Advanced Technology(More)
This paper describes the input/output subsystem that is provided with the Hawk operating system kernel and the SANDAC V computer. Hawk and the SANDAC V were designed for embedded hard real-time applications. The IOS is a hierarchically organized set of modules t h a t can be configured to match the requirements of a specific real-time application. It was(More)