1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027), 1999
Nonlinear propagation is recognized as an important aspect of ultrasonic medical imaging. In part... more Nonlinear propagation is recognized as an important aspect of ultrasonic medical imaging. In particular, rigorous estimates of tissue bioeffects must include it. Regulatory standards rely on measurements in water to estimate effects in lossy tissue, but nonlinearity confuses the relationship. To help clarify the connection the authors complement laboratory hydrophone data with computer simulations of acoustic pulses in water and
Recently, 65 nm technology-based microprocessors have been introduced into high-end products such... more Recently, 65 nm technology-based microprocessors have been introduced into high-end products such as games processors and high- performance servers [1]. As technology development in the modern-day relies more and more on non-traditional performance- leverage elements, there is an enhanced need to tighten the coupling between development, modeling, and design. We discuss the key challenges in the inter-related tasks of CMOS-technology
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine, 1999
Water can generate extreme waveform distortion compared to tissue, as indicated by the Goldberg n... more Water can generate extreme waveform distortion compared to tissue, as indicated by the Goldberg number for water, which is 20 times larger than that of tissue at typical diagnostic ultrasound levels. This result was demonstrated by using tofu as a tissue mimicking material. By adjusting transducer voltage drive levels in water to match the peak rarefactional pressures in water to those of waveforms in tofu, a close correspondence was obtained for the peak compressional pressure and time average intensity with depth. A poorer correspondence was found by comparing tofu waveforms with water waveforms that were compensated for broadband attenuation and driven at the same voltage level as tofu. A simplified broadband derating factor, allowing for band-width adjustment, was shown to be more accurate than the standard monochromatic derating. Several new indicators for quantifying the degree of observed nonlinearity are suggested: a field based nonlinearity parameter, a peak pressure ratio ...
Design for Manufacturability through Design-Process Integration, 2007
It is generally assumed that achieving a narrow distribution of physical gate length (Lpoly) for ... more It is generally assumed that achieving a narrow distribution of physical gate length (Lpoly) for the poly conductor layer helps improve power performance metrics of modern integrated circuits. However, in advanced 90 nm technologies, there are other drivers of chip performance. In this paper we show that a global optimization of all variables is necessary to achieve the optimum performance
It is well established that semiconductor device design must account for AC performance and leaka... more It is well established that semiconductor device design must account for AC performance and leakage on individual devices and small circuits when optimizing DC FET power-performance [1]. Small circuits of identical stages, wired to form a ring oscillator (RO) are commonly ...
Unique hybrid approach employing both model-based layout optimization and process improvement was... more Unique hybrid approach employing both model-based layout optimization and process improvement was successfully developed for reducing rapid thermal anneal (RTA) driven intra die variations. It has been applied to multiple bulk and SOI designs. The model developed herein enables fast estimation of broad-band reflectance of a random layout in 65 nm, 45 nm, and 32 nm nodes and guides reflectance
1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027), 1999
Nonlinear propagation is recognized as an important aspect of ultrasonic medical imaging. In part... more Nonlinear propagation is recognized as an important aspect of ultrasonic medical imaging. In particular, rigorous estimates of tissue bioeffects must include it. Regulatory standards rely on measurements in water to estimate effects in lossy tissue, but nonlinearity confuses the relationship. To help clarify the connection the authors complement laboratory hydrophone data with computer simulations of acoustic pulses in water and
Recently, 65 nm technology-based microprocessors have been introduced into high-end products such... more Recently, 65 nm technology-based microprocessors have been introduced into high-end products such as games processors and high- performance servers [1]. As technology development in the modern-day relies more and more on non-traditional performance- leverage elements, there is an enhanced need to tighten the coupling between development, modeling, and design. We discuss the key challenges in the inter-related tasks of CMOS-technology
Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine, 1999
Water can generate extreme waveform distortion compared to tissue, as indicated by the Goldberg n... more Water can generate extreme waveform distortion compared to tissue, as indicated by the Goldberg number for water, which is 20 times larger than that of tissue at typical diagnostic ultrasound levels. This result was demonstrated by using tofu as a tissue mimicking material. By adjusting transducer voltage drive levels in water to match the peak rarefactional pressures in water to those of waveforms in tofu, a close correspondence was obtained for the peak compressional pressure and time average intensity with depth. A poorer correspondence was found by comparing tofu waveforms with water waveforms that were compensated for broadband attenuation and driven at the same voltage level as tofu. A simplified broadband derating factor, allowing for band-width adjustment, was shown to be more accurate than the standard monochromatic derating. Several new indicators for quantifying the degree of observed nonlinearity are suggested: a field based nonlinearity parameter, a peak pressure ratio ...
Design for Manufacturability through Design-Process Integration, 2007
It is generally assumed that achieving a narrow distribution of physical gate length (Lpoly) for ... more It is generally assumed that achieving a narrow distribution of physical gate length (Lpoly) for the poly conductor layer helps improve power performance metrics of modern integrated circuits. However, in advanced 90 nm technologies, there are other drivers of chip performance. In this paper we show that a global optimization of all variables is necessary to achieve the optimum performance
It is well established that semiconductor device design must account for AC performance and leaka... more It is well established that semiconductor device design must account for AC performance and leakage on individual devices and small circuits when optimizing DC FET power-performance [1]. Small circuits of identical stages, wired to form a ring oscillator (RO) are commonly ...
Unique hybrid approach employing both model-based layout optimization and process improvement was... more Unique hybrid approach employing both model-based layout optimization and process improvement was successfully developed for reducing rapid thermal anneal (RTA) driven intra die variations. It has been applied to multiple bulk and SOI designs. The model developed herein enables fast estimation of broad-band reflectance of a random layout in 65 nm, 45 nm, and 32 nm nodes and guides reflectance
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