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A nonlinear signal-specific ADC for efficient neural recording 用于高效神经记录的非线性信号专用ADC
2010 Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2010-11-03 DOI: 10.1109/BIOCAS.2010.5709560
Mohsen Judy, A. M. Sodagar, R. Lotfi
{"title":"A nonlinear signal-specific ADC for efficient neural recording","authors":"Mohsen Judy, A. M. Sodagar, R. Lotfi","doi":"10.1109/BIOCAS.2010.5709560","DOIUrl":"https://doi.org/10.1109/BIOCAS.2010.5709560","url":null,"abstract":"A bandwidth-efficient technique for nonlinearly converting analog neural signals into digital is presented to be used in implantable neural recording microsystems. It is shown that the choice of a proper nonlinear quantization function helps reduce the outgoing bit rate carrying the recorded neural data. Another major benefit of digitizing neural signals using a proper nonlinear analog-to-digital converter (ADC) is the improvement in the signal-to-noise ratio (SNR) of the signal. The 8-b nonlinear anti-logarithmic ADC reported in this paper digitizes large action potentials with 10b resolution, while quantizing the small background noise with a resolution of as low as 3b. The circuit was designed and simulated in a 0.18-um CMOS process. According to the experimental results, SNR of the neural signal increases from 5.11 before digitization to 22 after being digitized using the proposed ADC approach.","PeriodicalId":440499,"journal":{"name":"2010 Biomedical Circuits and Systems Conference (BioCAS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130616372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
An ultra low-power peak-instant detector for a peak picking cochlear implant processor 一种用于峰值拾取人工耳蜗处理器的超低功耗峰值瞬时检测器
2010 Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2010-11-01 DOI: 10.1109/BIOCAS.2010.5709611
C. Sawigun, W. Ngamkham, W. Serdijn
{"title":"An ultra low-power peak-instant detector for a peak picking cochlear implant processor","authors":"C. Sawigun, W. Ngamkham, W. Serdijn","doi":"10.1109/BIOCAS.2010.5709611","DOIUrl":"https://doi.org/10.1109/BIOCAS.2010.5709611","url":null,"abstract":"This paper presents the design of a sub-threshold CMOS peak-instant detector to be used in a phase-locking peak-picking (PL-PP) bionic ear (BE) processor. The detector is formed by a current sample and hold circuit and a voltage comparator to perform the detection of occurrences of maximum and minimum values of the input. Circuit simulation results using CMOS 0.35 μm AMIS technology confirm that the proposed detector can be operated from a 1.2 V supply and consumes less than 1μW static power for detecting a 5kHz input signal (maximum frequency of the processor). For lower input frequencies the power consumption can be scaled down to further reduce the BE processor's power consumption.","PeriodicalId":440499,"journal":{"name":"2010 Biomedical Circuits and Systems Conference (BioCAS)","volume":"10 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120857227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Massively parallel processor array for mid-/back-end ultrasound signal processing 用于中/后端超声信号处理的大规模并行处理器阵列
2010 Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2010-11-01 DOI: 10.1109/BIOCAS.2010.5709624
D. Truong, B. Baas
{"title":"Massively parallel processor array for mid-/back-end ultrasound signal processing","authors":"D. Truong, B. Baas","doi":"10.1109/BIOCAS.2010.5709624","DOIUrl":"https://doi.org/10.1109/BIOCAS.2010.5709624","url":null,"abstract":"Ultrasound remains a popular imaging modality due to its mobility and cost-effectiveness. As general purpose computing and DSPs are entering an era of multi-core architectures, the potential for parallel performance gains are significant when used properly. This work explores the possibility of using a massively parallel processor array to meet realtime throughputs for mid-/back-end ultrasound processing. A many-core array of simple DSP cores, shared memories, and an FFT processor is shown to dissipate 87.79 mW for B-mode, 33.20 mW for color flow, and 29.24 mW for spectral doppler, while achieving a frame rate of 37.6 fps for B-mode and 12.5 fps for color flow.","PeriodicalId":440499,"journal":{"name":"2010 Biomedical Circuits and Systems Conference (BioCAS)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129880859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
On-chip feature extraction for spike sorting in high density implantable neural recording systems 高密度植入式神经记录系统中脉冲分选的片上特征提取
2010 Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2010-11-01 DOI: 10.1109/BIOCAS.2010.5709559
M. K. Awais, J. M. Andrew
{"title":"On-chip feature extraction for spike sorting in high density implantable neural recording systems","authors":"M. K. Awais, J. M. Andrew","doi":"10.1109/BIOCAS.2010.5709559","DOIUrl":"https://doi.org/10.1109/BIOCAS.2010.5709559","url":null,"abstract":"Modern microelectrode arrays acquire neural signals from hundreds of neurons in parallel that are subsequently processed for spike sorting. It is important to identify, extract and transmit appropriate features that allow accurate spike sorting while using minimum computational resources. This paper describes a new set of spike sorting features, explicitly framed to be computationally efficient and shown to outperform PCA based spike sorting. A hardware friendly architecture, feasible for implantation, is also presented for detecting neural spikes and extracting features to be transmitted for off chip spike classification.","PeriodicalId":440499,"journal":{"name":"2010 Biomedical Circuits and Systems Conference (BioCAS)","volume":"356 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115898273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 29
Multiplexing pH and temperature in a molecular biosensor 在分子生物传感器中复用pH值和温度
2010 Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2010-11-01 DOI: 10.1109/BIOCAS.2010.5709592
S. Carrara, Michele Daniel Torre, A. Cavallini, D. De Venuto, G. De Micheli
{"title":"Multiplexing pH and temperature in a molecular biosensor","authors":"S. Carrara, Michele Daniel Torre, A. Cavallini, D. De Venuto, G. De Micheli","doi":"10.1109/BIOCAS.2010.5709592","DOIUrl":"https://doi.org/10.1109/BIOCAS.2010.5709592","url":null,"abstract":"Robust and reliable measurements in electrochemical biosensing of molecules are crucial for personalized medicine. Electrochemical sensors based on cytochrome P450 can detect the large majority of drugs commonly used in pharmacological treatments. The same cytochrome can detect different substrates; each of them changes the electrochemical response of the enzyme in a specific manner. Our system exploits the measure of electrical potential to identify the drug type, while current measurements decode the drug concentration. Since potential and current are affected by pH and temperature, and since variations occur in the patient samples, we propose a novel design for multiplexing biosensing with pH and temperature control, which ensures more precise measurements for drugs identification and their quantification.","PeriodicalId":440499,"journal":{"name":"2010 Biomedical Circuits and Systems Conference (BioCAS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123920816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 28
Motion-tracking adaptive persistence and adaptive-size median filter for color Doppler processing in ultrasound systems on multicore platform 多核平台超声系统彩色多普勒处理的运动跟踪自适应持久性和自适应中值滤波器
2010 Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2010-11-01 DOI: 10.1109/BIOCAS.2010.5709570
Cheng-Zhou Zhan, Kai Chang, Yu-Hao Chen, Pai-Chi Li, A. Wu
{"title":"Motion-tracking adaptive persistence and adaptive-size median filter for color Doppler processing in ultrasound systems on multicore platform","authors":"Cheng-Zhou Zhan, Kai Chang, Yu-Hao Chen, Pai-Chi Li, A. Wu","doi":"10.1109/BIOCAS.2010.5709570","DOIUrl":"https://doi.org/10.1109/BIOCAS.2010.5709570","url":null,"abstract":"Color Doppler processing in the ultrasound imaging systems is mainly used to observe the blood flow in the region of interest. The desired blood signal will be greatly affected by the speckle noises, and the major design issues are to eliminate these kinds of noises effectively. In this work, we propose the time-domain (1) motion-tracking adaptive persistence and spatial-domain (2) adaptive-size median filter for effectively eliminating the speckle noises, respectively. The proposed two filters have individually 2~3 dB better performance than the referenced algorithms, and the proposed adaptive de-speckle filters can also work together in the same system to obtain even better performances. At last, the proposed signal-processing algorithms are implemented on the multi-core platform, and the property of parallel processing significantly accelerates the computation.","PeriodicalId":440499,"journal":{"name":"2010 Biomedical Circuits and Systems Conference (BioCAS)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125991874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Biologically inspired image sampling for electronic eye 电子眼的生物启发图像采样
2010 Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2010-11-01 DOI: 10.1109/BIOCAS.2010.5709617
F. Robert-Inacio, Rémy Scaramuzzino, Q. Stainer, Edith Kussener-Combier
{"title":"Biologically inspired image sampling for electronic eye","authors":"F. Robert-Inacio, Rémy Scaramuzzino, Q. Stainer, Edith Kussener-Combier","doi":"10.1109/BIOCAS.2010.5709617","DOIUrl":"https://doi.org/10.1109/BIOCAS.2010.5709617","url":null,"abstract":"In biomedical field, electronic eyes are of a great interest to provide visual information to blind people. Some of them are built to be plugged to the optical nerve and others to the visual cortex itself. In our case the electronic eye processes images in order to reproduce the retina behavior, as well as some of the visual cortex abilities. The main task presented in this paper deals with data acquisition and restitution. In other words the image acquired by a classical CCD is re-sampled in order to reproduce cone acquisition. Cones are small photo-receptors located on the retina perpendicularly to the visual axis. As cones are dedicated to color perception the presented method shows how to process color data in order to obtain a radial-sampled image. In this way the amount of data decreases considerably and the image processing to be achieved later is fastened up.","PeriodicalId":440499,"journal":{"name":"2010 Biomedical Circuits and Systems Conference (BioCAS)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130223479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Respiration monitoring based on magnetic induction using a single coil 基于单线圈磁感应的呼吸监测
2010 Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2010-11-01 DOI: 10.1109/BIOCAS.2010.5709565
D. Teichmann, J. Foussier, S. Leonhardt
{"title":"Respiration monitoring based on magnetic induction using a single coil","authors":"D. Teichmann, J. Foussier, S. Leonhardt","doi":"10.1109/BIOCAS.2010.5709565","DOIUrl":"https://doi.org/10.1109/BIOCAS.2010.5709565","url":null,"abstract":"Respiratory activity correlates with the conductivity distribution within the thorax. The change in conductivity can be monitored by impedance measurements based on eddy current induction without any need for contact between instrumentation and body. A system for magnetic induction measurements of the thorax using a single sensor-coil is presented. In contrast to most other known single coil respiration monitoring systems, the signal is amplitude and not frequency modulated. This renders the possibility of measuring with constant excitation frequencies.","PeriodicalId":440499,"journal":{"name":"2010 Biomedical Circuits and Systems Conference (BioCAS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126391476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
Towards a next generation neural interface: Optimizing power, bandwidth and data quality 迈向下一代神经接口:优化功率、带宽和数据质量
2010 Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2010-11-01 DOI: 10.1109/BIOCAS.2010.5709586
A. Eftekhar, Sivylla E. Paraskevopoulou, T. Constandinou
{"title":"Towards a next generation neural interface: Optimizing power, bandwidth and data quality","authors":"A. Eftekhar, Sivylla E. Paraskevopoulou, T. Constandinou","doi":"10.1109/BIOCAS.2010.5709586","DOIUrl":"https://doi.org/10.1109/BIOCAS.2010.5709586","url":null,"abstract":"In this paper, we review the state-of-the-art in neural interface recording architectures. Through this we identify schemes which show the trade-off between data information quality (lossiness), computation (i.e. power and area requirements) and the number of channels. We further extend these tradeoffs by band-limiting the signal through reducing the front-end amplifier bandwidth. We therefore explore the possibility of band-limiting the spectral content of recorded neural signals (to save power) and investigate the effect this has on subsequent processing (spike detection accuracy). We identify the spike detection method most robust to such signals, optimize the threshold levels and modify this to exploit such a strategy.","PeriodicalId":440499,"journal":{"name":"2010 Biomedical Circuits and Systems Conference (BioCAS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133403275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 40
A reconfigurable neural spike recording channel with feature extraction capabilities 具有特征提取功能的可重构神经尖峰记录通道
2010 Biomedical Circuits and Systems Conference (BioCAS) Pub Date : 2010-11-01 DOI: 10.1109/BIOCAS.2010.5709585
A. Rodríguez-Pérez, J. Ruiz-Amaya, Oscar Guerra, M. Delgado-Restituto
{"title":"A reconfigurable neural spike recording channel with feature extraction capabilities","authors":"A. Rodríguez-Pérez, J. Ruiz-Amaya, Oscar Guerra, M. Delgado-Restituto","doi":"10.1109/BIOCAS.2010.5709585","DOIUrl":"https://doi.org/10.1109/BIOCAS.2010.5709585","url":null,"abstract":"This paper describes the architecture of a neural spike recording channel with feature extraction capabilities and presents the design of one of its key elements, a reconfigurable 8-bit ADC. The ADC can be programmed for different conversion rates and embeds a 0–18dB programmable gain amplifier with discrete gain steps of 3dB. Simulation results from extracted layout of the ADC, designed in a 130nm CMOS technology, obtain almost 8-bit ENOB at 22.2kS/s and 90kS/s, with a power consumption of 500nW and 1.8μW, respectively.","PeriodicalId":440499,"journal":{"name":"2010 Biomedical Circuits and Systems Conference (BioCAS)","volume":"569 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113998164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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