1,721,155 research outputs found
Qi yi de cha qu.
No full text奧泥爾[歐奈爾]著 ; 王實味譯.Translation of: Strange interlude.九幕劇.Aoni'er [Ounai'er] zhu ; Wang Shiwei yi.Jiu mu ju
Bureaucraties chinoises (textes rassemblés par R. Lew et F. Thierry) ; contributions de Guilhem Fabre, Paul Galard, Hua Linshan, Roland Lew, Jean-Louis Margolin, Yves Plasseraud, Georges Tan Eng Bok, Wang Shiwei et Pierre-Etienne Will, 1986
No full textCabestan Jean-Pierre. Bureaucraties chinoises (textes rassemblés par R. Lew et F. Thierry) ; contributions de Guilhem Fabre, Paul Galard, Hua Linshan, Roland Lew, Jean-Louis Margolin, Yves Plasseraud, Georges Tan Eng Bok, Wang Shiwei et Pierre-Etienne Will, 1986. In: Études chinoises, vol. 6, n°1, Printemps 1987. pp. 162-166
Peak-triggered sampling circuitry for a fine-structure-aware cochlear implant
No full textThis paper presents a peak-triggered sampling scheme for future cochlear implants that aim to reserve temporal fine structure in the neural stimulation pulses. To address the low-power and small-area challenge for such application, the asynchronous delta modulation techniques are used to implement the scheme in VLSI circuitry. Simulation results show that the proposed circuitry achieves the required stimulation encoding function with less than 7μW power consumption and only 0.004mm2 area occupation, which makes it a promising candidate to implement future fine-structure-aware cochlear implant stimulation strategy
Asynchronous event-driven encoder with simultaneous temporal envelope and phase extraction for cochlear implants
No full textConventional cochlear implants using periodic sampling are power consuming and incapable of capturing the amplitude and phase of the input acoustic signal simultaneously. This paper presents an asynchronous event-driven encoder chip for cochlear implants capable of extracting the temporal fine structure. The chip architecture is based on asynchronous delta modulation (ADM) where the signal peak/trough crossing events are captured and digitized intrinsically, which has the advantages of significantly reduced power consumption, reduced circuit area, and the elimination of dedicated data compression circuitry. An 8-channel prototype chip was fabricated in 0.18 μm 1P6M CMOS process, occupying an area of 0.125 × 1.7 mm2 and has a power consumption of 36.2 μW from a 0.6V supply. A 16-channel stimulation encoding system was built by integrating two test chips, capable of processing the entire audible frequency range from 100 Hz to 10 kHz. Experimental characterization using the human voice is provided to corroborate functionality in the application environment
An FPGA-based adaptive tuning control for a cochlea-mimicking filter channel
No full textThis paper presents the design and experimental results of an FPGA-based cochlea filter tuning control block that emulates the active nonlinear behaviour of outer hair cells (OHC) in the cochlea. The tuning block uses data measured from physiological experiments which are mapped into adaptive voltage bias of a CMOS cochlea-mimicking filter channel to tune it. It extracts signal level from inputs to the cochlea channel and feedforwards the corresponding voltage bias to the tuning stage of the filter channel. A level-dependent control of the filter gain and quality factor was observed in the measurement results. The tuning control block nonlinearly compressed wide range of audio input distinctively into about 20 dB, which is the active gain inherent in the sample cochlea channel used. Based on this work, we will be able to build an intelligent audio front-end for future machine hearing systems that is able to adaptively process sound and cope with wide dynamic sound input like the cochlea does
Review of the multi-Input Single-Inductor Multi-Output (MISIMO) energy harvesting interface applied in wearable electronics
No full textAlong with the industrialization and popularization of the wearable electronics, an increasing number of the wireless sensor nodes (WSNs) are deployed. Nevertheless, the conventional battery-based power supply system has no longer satisfied the requirement of large-scale WSNs in terms of battery life, which emerges the energy harvesting (EH) technique. In order to combine various of energy sources and drive multiloads, the multi-input single-inductor multi-output (MISIMO) EH interface applied to wearable electronics is spotlighted. In this mini-review article, the solutions for improving power conversion efficiency (PCE) and output quality in MISIMO EH interface are summarized. Furthermore, the future trends of MISIMO EH interface are also presented
On low-leakage CMOS switches
No full textContinuing CMOS process scaling to favor the design of high-performance digital systems has resulted in many issues for precision analog design, and one of which is the detrimental transistor leakage. This paper focuses on the analysis and design of low-leakage switches. Specifically, transistor leakage mechanisms and the evolution of low-leakage switch design techniques are revisited. Different schemes to achieve transistor channel and body leakage reduction are discussed. In addition,we propose a low-leakage switch that can operate for a wide temperature range. At 200 ◦C, it achieves 130× and 8× lower leakage than the transmission gate and the popular analog Tswitch, respectively
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