{"title":"Parametric analysis of helical resonators for resonant wireless power transmission links","authors":"A. Robichaud, Martin Boudreault, D. Deslandes","doi":"10.1109/NEWCAS.2012.6329042","DOIUrl":"https://doi.org/10.1109/NEWCAS.2012.6329042","url":null,"abstract":"This paper presents a parametric study of wireless power transmission links composed of two identical helical resonators. The effect of the helix radius, the pitch and the number of turns are studied in order to find the optimal geometry that maximizes the transmission efficiency. The product of the coupling coefficient and the quality factor is used as a figure of merit to compare the different structures. A practical validation is presented and it shows that the simulations predict accurately the frequency response of the link. We demonstrate that the best performance is achieved when the radius is equivalent to approximately 75% of the transmission distance.","PeriodicalId":122918,"journal":{"name":"10th IEEE International NEWCAS Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124985570","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}
Rajeev Narayanan, Alaeddine Daghar, M. Zaki, S. Tahar
{"title":"Using LCSS algorithm for circuit level verification of analog designs","authors":"Rajeev Narayanan, Alaeddine Daghar, M. Zaki, S. Tahar","doi":"10.1109/NEWCAS.2012.6328987","DOIUrl":"https://doi.org/10.1109/NEWCAS.2012.6328987","url":null,"abstract":"This paper relies on the longest closest subsequence (LCSS), a variant of the longest common subsequence (LCS), to account for process variation and mismatch in analog circuits. At circuit level, the effect of mismatch and process variation that results in offsets is analyzed by performing parametric and statistical techniques and then applying LCSS to estimate the probability of closest matching. The acceptance/rejection of a circuit is done using bounded hypothesis testing. The approach is illustrated on a Rambus ring oscillator circuit for a 90nm fabrication process. Advantages of the proposed methods are robustness and flexibility to account for a wide range of variations.","PeriodicalId":122918,"journal":{"name":"10th IEEE International NEWCAS Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121784060","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}
{"title":"An approach to localization scheme of wireless sensor networks based on artificial neural networks and Genetic Algorithms","authors":"Stephan H. Chagas, J. B. Martins, L. Oliveira","doi":"10.1109/NEWCAS.2012.6328975","DOIUrl":"https://doi.org/10.1109/NEWCAS.2012.6328975","url":null,"abstract":"Localization of nodes in wireless sensor networks without the use of GPS is important for applications such as military surveillance, environmental monitoring, robotics, domotics, animal tracking, and many others. Low cost and energy efficient sensors require methods that compute their position using indirect information such as RSSI (Received Signal Strength Indicator). This work presents an artificial neural networks (ANNs) approach to localization in wireless sensor networks through the adjustment of the ANNs structures using Genetic Algorithms. A population of feedforward ANNs containing their structure in a genetic code is evolved during 20 generations. Each individual is evaluated through the training of the artificial neural network and further calculation of its root mean square error for all the testing set. The RSSI measurements were used as the artificial neural networks inputs to localize the nodes. The approach was tested using the MATLAB-based Probabilistic Wireless Network Simulator (Prowler) to collect the artificial neural networks input data, under simulated static indoor network environment of 26×26 meters with 8 anchor nodes, i.e., nodes with awareness of their positions. The MATLAB's genetic algorithms and artificial neural networks toolboxes were used. Results using the best artificial neural network structure found after optimization had a root mean square error of 0.41 meters, a maximum error of 1.07 meters and a minimum error of 0.014 meters.","PeriodicalId":122918,"journal":{"name":"10th IEEE International NEWCAS Conference","volume":"273 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115599963","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}
D. DiTomaso, S. Laha, S. Kaya, D. Matolak, Avinash Karanth Kodi
{"title":"Energy efficient modulation for a wireless network-on-chip architecture","authors":"D. DiTomaso, S. Laha, S. Kaya, D. Matolak, Avinash Karanth Kodi","doi":"10.1109/NEWCAS.2012.6329063","DOIUrl":"https://doi.org/10.1109/NEWCAS.2012.6329063","url":null,"abstract":"As both power consumption and leakage currents will limit the scalability of future massively integrated computational systems, research into emerging technologies and devices to replace traditional metallic interconnects has become critical. In this paper we propose an initial implementation for a hybrid wireless network-on-chip (WiNoC) interconnect architecture, named iWISE, for current chip multiprocessors (CMPs). iWISE combines wired interconnects with wireless links that use both frequency and time division multiplexing to offer a balanced, flexible, orthogonal wireless data transfer among cores. We provide a basic description of the iWISE architecture and describe a practical solution for the implementation of wireless interconnects based on an on-off keying (OOK) modulator using ultra-compact Double Gate (DG) CMOS devices. The proposed OOK modulator takes advantage of DG-CMOS devices especially in building compact modulation and tunable amplification circuitry. Real applications from the benchmark suite PARSEC as well as synthetic traffic show an improvement in performance as well as a savings in power.","PeriodicalId":122918,"journal":{"name":"10th IEEE International NEWCAS Conference","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114655548","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}
{"title":"Broadband microwave biosensing based on interdigitated capacitor for Lab-on-Chip applications","authors":"D. Dubuc, K. Grenier, M. Poupot, J. Fournié","doi":"10.1109/NEWCAS.2012.6329073","DOIUrl":"https://doi.org/10.1109/NEWCAS.2012.6329073","url":null,"abstract":"This paper presents an innovative biosensing technique based on the interaction between biomaterial and microwave electromagnetic (EM) waves, which probes the bio-parameters of investigated biological samples. Thanks to microtechnologies, this approach is able to sense biomaterials down to living cells size without invasivity. Broadband dielectric spectroscopy of living cells suspension is consequently demonstrated sketching a rich EM signature. Capacitive contrasts of 4% and 12% between cells suspension and pure medium are measured at 20 and 40GHz respectively. This analyzing technique consequently represents a promising integrated solution compatible with Lab-on-Chip (LoC) applications.","PeriodicalId":122918,"journal":{"name":"10th IEEE International NEWCAS Conference","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114871624","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}
J. Schell, J. Kammerer, L. Hébrard, E. Breton, D. Gounot, L. Cuvillon, M. Mathelin
{"title":"CMOS 3D Hall probe for magnetic field measurement in MRI scanner","authors":"J. Schell, J. Kammerer, L. Hébrard, E. Breton, D. Gounot, L. Cuvillon, M. Mathelin","doi":"10.1109/NEWCAS.2012.6329070","DOIUrl":"https://doi.org/10.1109/NEWCAS.2012.6329070","url":null,"abstract":"This paper presents a 3D Hall probe integrated in a 0.35μm CMOS technology and dedicated to the measurement of the magnetic field gradients in a MRI scanner. It features a 3D Hall device and three instrumentation chains which suppress the MRI main magnetic field and amplify dedicated magnetic field gradients. The unique relationship between the space coordinates in the scanner bore and the magnetic field gradients allows determining accurately the location of the Hall probe inside the bore. First experimental results show that the proposed 3D Hall probe could be used for a MRI tracking system with a sub-millimeter spatial resolution. It is a first step towards the instrumentation of MRI-compatible minimally-invasive surgical tools.","PeriodicalId":122918,"journal":{"name":"10th IEEE International NEWCAS Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124713740","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}
Joseph P. Davis, J. Carletta, R. Veillette, L. Du, J. Zhe
{"title":"Instrumentation circuitry for an inductive wear debris sensor","authors":"Joseph P. Davis, J. Carletta, R. Veillette, L. Du, J. Zhe","doi":"10.1109/NEWCAS.2012.6329066","DOIUrl":"https://doi.org/10.1109/NEWCAS.2012.6329066","url":null,"abstract":"The design of instrumentation circuitry for an inductive sensor to detect small metal particles is presented. The sensor, designed for counting and characterizing wear debris particles in lubrication oil, detects changes in the inductance of a small coil as metal particles pass through it. A change in inductance produces a differential voltage at the output of a Maxwell-Wien bridge, which is then amplified and rectified to produce a DC voltage pulse detectable using standard data acquisition components. For iron particles approximately 75μm and 150μm in diameter, the circuit produces output voltage pulses of 381mV and 693mV, respectively.","PeriodicalId":122918,"journal":{"name":"10th IEEE International NEWCAS Conference","volume":"219 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123005249","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}
{"title":"Integrated transmission lines for complementary cross-coupled bandpass filters in ΣΔ modulators","authors":"A. Zahabi, M. Anis, M. Ortmanns","doi":"10.1109/NEWCAS.2012.6329001","DOIUrl":"https://doi.org/10.1109/NEWCAS.2012.6329001","url":null,"abstract":"In this paper, the properties of various types of transmission lines (TLs) intended for an integrated RF TL based sigma delta modulator (ITLSDM) are extracted. The EM simulator is used to achieve accurate models for TLs in a 180nm CMOS technology. The effects of TL parameters are compared and studied in order to achieve the guidelines, which save the area and power consumption of the modulator. The results are verified with an architecture, which is based on complementary cross-coupled bandpass filter (C-BPF) with an auxiliary negative transconductance (ANG). This filter is employed in a 9.6GHz 4th order fs/4 bandpass SDM tuned at a center frequency of 2.4GHz.","PeriodicalId":122918,"journal":{"name":"10th IEEE International NEWCAS Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122560683","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}
{"title":"Efficient hardware implementation of threshold neural networks","authors":"B. Zamanlooy, M. Mirhassani","doi":"10.1109/NEWCAS.2012.6328941","DOIUrl":"https://doi.org/10.1109/NEWCAS.2012.6328941","url":null,"abstract":"Area and Noise to Signal Ratio (NSR) are two main factors in hardware implementation of neural networks. Despite attempts to reduce the area of sigmoid and hyperbolic tangent activation functions, they cannot achieve the efficiency of threshold activation function. A new NSR efficient architecture for threshold networks is proposed in this paper. The proposed architecture uses different number of bits for weight storage in different layers. The optimum number of bits for each layer is found based on the mathematical derivation using stochastic model. Network training is done using the recently introduced learning algorithm called Extreme Learning Machine (ELM). A 4-7-4 network is considered as a case study and its hardware implementation for different weight accuracies is investigated. The proposed design is more efficient considering area × NSR as a performance metric. VLSI implementation of the proposed architecture using a 0.18 μm CMOS process is presented which shows 44.16%, 58.04 % and 67.30% improvement for total number of bits equal to 16, 20 and 24.","PeriodicalId":122918,"journal":{"name":"10th IEEE International NEWCAS Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125382484","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}
{"title":"Efficient signal reconstruction scheme for time-interleaved ADCs","authors":"A. K. M. Pillai, H. Johansson","doi":"10.1109/NEWCAS.2012.6329030","DOIUrl":"https://doi.org/10.1109/NEWCAS.2012.6329030","url":null,"abstract":"Time-interleaved analog-to-digital converters (ADCs) exhibit offset, gain, and time-skew errors due to channel mismatches. The time skews give rise to a nonuniformly sampled signal instead of the desired uniformly sampled signal. This introduces the need for a digital signal reconstructor that takes the “nonuniform samples” and generates the “uniform samples”. In the general case, the time skews are frequency dependent, in which case a generalization of nonuniform sampling applies. When the bandwidth of a digital reconstructor approaches the whole Nyquist band, the computational complexity may become prohibitive. This paper introduces a new scheme with reduced complexity. The idea stems from recent multirate-based efficient realizations of linear and time-invariant system . However, a time-interleaved ADC (without correction) is a time-varying system which means that these multirate-based techniques cannot be used straightforwardly but need to be appropriately analyzed and extended for this context.","PeriodicalId":122918,"journal":{"name":"10th IEEE International NEWCAS Conference","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131105856","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}