نتایج جستجو برای: ultra low cement
تعداد نتایج: 1270425 فیلتر نتایج به سال:
For a massive yet sustainable Internet-of-Things, ultra-low-power wireless communications are required without compromising connectivity. In the electronic circuits and systems (ECS) group, we pursue new solutions to this challenge with ultra-low-voltage RF integrated circuit (IC) and systemon-chip (SoC) design. Latest results feature a 0.55V IEEE 802.15.4a Impulse-Radio Ultra-Wideband (IR-UWB)...
We propose an architecture and circuit for temperature sensors integrated within systems on a chip. The circuit is based on special properties of devices when biased by a current with a particular dependence with temperature. We present results from a test circuit fabricated on a standard 0.8 μm CMOS technology which draws under 40 nA from a 1.6 V to 3.0 V supply at room temperature. Measuremen...
Low voltage high-efficiency DC-DC conversion circuits are integral components of battery operated portable systems. This paper presents the design of a pulse width modulated (PWM) controller for a milliwatt level DC-DC converter. Low power control circuitry is constructed by utilizing a delay line based PWM generator and low-resolution feedback. A IDC-DC converter has been fabricated which deli...
BACKGROUND The purpose of this study was to investigate whether ultra-low-dose chest computed tomography (CT) can be used for visual assessment of CT features in patients with pulmonary alveolar proteinosis (PAP) and to evaluate the relationship between the quantitative analysis of the ultra-low-dose CT scans and the pulmonary function tests (PFTs). METHODS Thirty-eight patients (mean [SD] ag...
Introduction: To achieve acceptable clinical performance, a ceramic veneer must be bonded to enamel by well-polymerized resin cement. Among different factors, thickness and translucency of the ceramic may affect the resin cement polymerization. Thus, the current study evaluated the effect of the thickness and translucency of lithium disilicate ceramic on light-cured resin cement bond strength t...
Stanford has been developing a low voltage CMOS technology which could have a signiicant impact on a wide range of products from personal digital assistants to volume silicon supercomputers. The technology achieves a unique combination of high performance and low energy per operation by combining aggressive voltage scaling with process optimization. The approach is based on the insight that the...
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