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2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS)最新文献

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High-level design and synthesis of a MPEG-4 AAC IMDCT module MPEG-4 AAC IMDCT模块的高级设计与合成
2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2013-05-23 DOI: 10.1109/LASCAS.2013.6519061
R. C. Sampaio, P. Berger, R. Jacobi
{"title":"High-level design and synthesis of a MPEG-4 AAC IMDCT module","authors":"R. C. Sampaio, P. Berger, R. Jacobi","doi":"10.1109/LASCAS.2013.6519061","DOIUrl":"https://doi.org/10.1109/LASCAS.2013.6519061","url":null,"abstract":"This paper presents an architectural design space exploration of the MPEG-4 AAC Inverse Modified Cosine Transform (IMDCT) starting from an algorithmic C++ description. Using a High-level Synthesis tool, several alternative solutions were generated with different results in terms of area and throughput. All designs have been synthesized and tested with FPGAs and the final architecture has shown similar resources utilization to the obtained with an RTL design, but requiring much less development time. We present a comparison of the costs for the two approaches regarding the silicon area, speed and required DSP resources.","PeriodicalId":190693,"journal":{"name":"2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS)","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130008171","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
An application of the empirical mode decomposition to brain magnetic resonance images classification 经验模态分解在脑磁共振图像分类中的应用
2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2013-05-23 DOI: 10.1109/LASCAS.2013.6518997
S. Lahmiri, M. Boukadoum
{"title":"An application of the empirical mode decomposition to brain magnetic resonance images classification","authors":"S. Lahmiri, M. Boukadoum","doi":"10.1109/LASCAS.2013.6518997","DOIUrl":"https://doi.org/10.1109/LASCAS.2013.6518997","url":null,"abstract":"A new approach to distinguish normal from abnormal brain magnetic resonance (MR) images is presented. First, the empirical mode decomposition (EMD) is applied to brain MR images to obtain high frequency intrinsic mode functions (IMF) from which features are extracted. Then, an entropy-based selection process is used to identify the most informative and non redundant features from each IMF before classification by support vector machines (SVM). The validation of the approach with a MR image database consisting of Alzheimer's disease, glioma, herpes encephalitis, metastatic bronchogenic carcinoma, multiple sclerosis, and normal condition shows its effectiveness as well as slightly better classification efficiency in comparison to using discrete wavelet transform-based alternatives. However, the EMD approach is substantially more time consuming.","PeriodicalId":190693,"journal":{"name":"2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131095526","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
Codebook improvements for a CMOS imager with focal-plane vector quantization 具有焦平面矢量量化的CMOS成像仪的码本改进
2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2013-05-23 DOI: 10.1109/LASCAS.2013.6519052
R. D. M. E. Filho, J. Gomes, A. Petraglia
{"title":"Codebook improvements for a CMOS imager with focal-plane vector quantization","authors":"R. D. M. E. Filho, J. Gomes, A. Petraglia","doi":"10.1109/LASCAS.2013.6519052","DOIUrl":"https://doi.org/10.1109/LASCAS.2013.6519052","url":null,"abstract":"In previous works a 32 × 32 pixel CMOS image sensor featuring focal-plane image compression based on differential pulse-code modulation and vector quantization was presented. Images compressed with this imager were reconstructed at peak signal-to-noise ratios around 18 dB, for bit rates below 0.94 bit per pixel. In this work, we focus on the improvement of the vector quantization stage of the previously proposed imager. We use experimentally captured photographs to update the code-book that is used at the decoder side. With the new codebooks, we are able to reconstruct texture feature vectors with a mean squared error (MSE) that is consistently smaller than the MSE obtained with the originally designed codebook.","PeriodicalId":190693,"journal":{"name":"2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116277657","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
Implementation and evaluation of an adaptive method for reduce the respiration influence on Heart Rate Variability 一种降低呼吸对心率变异性影响的自适应方法的实现与评价
2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2013-05-23 DOI: 10.1109/LASCAS.2013.6519073
Raymundo Cassani, J. Sanchez, Raul Martinez
{"title":"Implementation and evaluation of an adaptive method for reduce the respiration influence on Heart Rate Variability","authors":"Raymundo Cassani, J. Sanchez, Raul Martinez","doi":"10.1109/LASCAS.2013.6519073","DOIUrl":"https://doi.org/10.1109/LASCAS.2013.6519073","url":null,"abstract":"In this paper it is described the implementation and evaluation of an adaptive method that has as aim to cancel the influence of the respiratory signal over the Heart Rate Variability (HRV) signal in order to enhance the power estimation of its spectral components. The method consists in an Adaptive Noise Cancellation (ANC) structure that uses a Finite Impulse Response (FIR) filter together with the Normalized Least Mean Squares (NLMS) adaptation algorithm. Respiration and electrocardiogram (ECG) signals were obtained simultaneously using 240Hz sampling frequency. After data acquisition, tachogram was derived from ECG signal to obtain its HRV signal; then ANC filtering is applied, reducing variations due to respiration from HRV signal. This method was evaluated for spontaneous and for two controlled respiration frequencies. 6-minutes registers were taken form 10 people during the 3 different scenarios giving a total of 30 registers. Power Spectral Density (PSD) was estimated from the HRV signal before and after filtering and compared. At the results, it is observed that frequency components related to respiration are cancelled in the HRVs PSD, reaching an improved estimation of the control exerted by the Autonomic Nervous System (ANS) over the heart rate.","PeriodicalId":190693,"journal":{"name":"2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114745364","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
Designing MEMS pressure sensors with integrated circuitry on silicon for miscellaneous applications 基于硅的集成电路MEMS压力传感器的设计
2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2013-05-23 DOI: 10.1109/LASCAS.2013.6519006
W. Schreiber-Prillwitz, R. Job
{"title":"Designing MEMS pressure sensors with integrated circuitry on silicon for miscellaneous applications","authors":"W. Schreiber-Prillwitz, R. Job","doi":"10.1109/LASCAS.2013.6519006","DOIUrl":"https://doi.org/10.1109/LASCAS.2013.6519006","url":null,"abstract":"The performance of a co-integrated pressure sensor family with on-chip signal processing was optimized with regard to wide pressure ranges for miscellaneous applications. The sensor systems based on silicon and the piezoresistive effect. A systematical approach was developed to determine the electrical behavior of the piezoresistive pressure sensors. The constraint was that for cost efficiency a minimum number of masks of a product mask set should be used for a maximum number of applications. For a family of CMOS integrated pressure sensor systems, this goal could be reached, and wide pressure ranges were covered by just introducing one additional mask level for the implantation of piezoresistors on the pressure membrane.","PeriodicalId":190693,"journal":{"name":"2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132288344","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
8912-bit Montgomery multipliers using radix-8 booth encoding and coded-digit 8912位蒙哥马利乘法器使用基数8展位编码和编码数字
2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2013-05-23 DOI: 10.1109/LASCAS.2013.6519072
Claudia Patricia Renteria-Mejia, V. Trujillo-Olaya, Jaime Velasco-Medina
{"title":"8912-bit Montgomery multipliers using radix-8 booth encoding and coded-digit","authors":"Claudia Patricia Renteria-Mejia, V. Trujillo-Olaya, Jaime Velasco-Medina","doi":"10.1109/LASCAS.2013.6519072","DOIUrl":"https://doi.org/10.1109/LASCAS.2013.6519072","url":null,"abstract":"This paper presents the design of 8192-bit Montgomery multipliers based on radix-8 Booth encoding and coded-digit. Both multipliers use a systolic architecture and simultaneously carry out two multiplications. The designs are described in generic structural VHDL, synthesized on the EP4SGX230KF40C2 using Quartus II V.12, and verified using SignalTap. The hardware synthesis and performance results show that the designed multipliers present a good area-throughput trade-off and they are suitable for use into a hardware cryptoprocessor.","PeriodicalId":190693,"journal":{"name":"2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126281066","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: 3
Mixed-mode biquad filter employing single active element 采用单有源元件的混合模式双路滤波器
2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2013-05-23 DOI: 10.1109/LASCAS.2013.6518982
F. Kaçar, A. Kuntman, H. Kuntman
{"title":"Mixed-mode biquad filter employing single active element","authors":"F. Kaçar, A. Kuntman, H. Kuntman","doi":"10.1109/LASCAS.2013.6518982","DOIUrl":"https://doi.org/10.1109/LASCAS.2013.6518982","url":null,"abstract":"Mixed-mode filters are useful circuit blocks in modern microelectronic systems applications, such as controls and voice and data communications. In this paper, a mixed-mode biquad filter is proposed providing voltage, current, transconductance and transresistance operating modes. The proposed filter structure only uses a single fully differential current conveyor (FDCCII), two resistors and two capacitors. Moreover, the proposed biquad filter still enjoys,(i) employment only one active element, two capacitors and two resistors, (ii) grounded capacitors and resistors in all modes except voltage mode multi-input single-output filter for proposed filters and (iii) no requirement with the component choice conditions to realize specific filtering functions (iv) no need for inverting amplifiers for special input signals. We performed simulations with SPICE simulation program. Simulation results are found in close agreement with theoretical results.","PeriodicalId":190693,"journal":{"name":"2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121406433","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: 5
Analysis of process variations' impact on a 2.4 GHz 90 nm CMOS LNA 工艺变化对2.4 GHz 90 nm CMOS LNA的影响分析
2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2013-05-23 DOI: 10.1109/LASCAS.2013.6519087
J. L. G. Rios, J. C. Cruz, D. Vázquez, A. Rueda
{"title":"Analysis of process variations' impact on a 2.4 GHz 90 nm CMOS LNA","authors":"J. L. G. Rios, J. C. Cruz, D. Vázquez, A. Rueda","doi":"10.1109/LASCAS.2013.6519087","DOIUrl":"https://doi.org/10.1109/LASCAS.2013.6519087","url":null,"abstract":"This work presents the analysis of a 90 nm CMOS LNA under process variations. The main parameters charactering the performance of this kind of devices are analyzed. It shows how the performance degradation is mainly derived from the resonant frequency shifting due to the output matching passive network. A way to partially compensate the degradation is presented. Preliminary results are shown.","PeriodicalId":190693,"journal":{"name":"2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122524139","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
ACO approach in static routing for network-on-chips with 3D mesh topology 三维网格拓扑片上网络静态路由中的蚁群算法
2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2013-05-23 DOI: 10.1109/LASCAS.2013.6519038
Luneque Silva Junior, N. Nedjah, Luiza de Macedo Mourelle
{"title":"ACO approach in static routing for network-on-chips with 3D mesh topology","authors":"Luneque Silva Junior, N. Nedjah, Luiza de Macedo Mourelle","doi":"10.1109/LASCAS.2013.6519038","DOIUrl":"https://doi.org/10.1109/LASCAS.2013.6519038","url":null,"abstract":"With increasing integration capability of integrated systems, today we see numerous systems based on a set of processing elements. One example is multi-core processors. An efficient connection of these elements can be obtained with use of interconnection networks. This approach is similar to traditional computer networks. However, this paradigm is not restricted to multi-processors. In fact, it is possible to interconnect several dedicated devices. Such systems are said NoC based, because of the use of network-on-chip platform. Like other networks, NoCs can be arranged in different topologies, such as ring, mesh and torus. Because several data packets can be transmitted simultaneously through the network, an efficient routing strategy must be used in order to avoid congestion delays. Ant colony algorithms have proves effective in static routing in systems designed to perform a fixed set of tasks, or where the communication pattern is known. In this paper, we study the performance of ACO-based routing in NoC with 3D mesh topology. The results are compared with other types of routing, such as deterministic or with use of randomness.","PeriodicalId":190693,"journal":{"name":"2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS)","volume":"25 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120906425","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: 7
A voltage-mode boost DC-DC converter with a constant-duty-cycle pulse control 具有恒定占空比脉冲控制的电压型升压DC-DC变换器
2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS) Pub Date : 2013-05-23 DOI: 10.1109/LASCAS.2013.6518983
Chinder Wey, Chung-Hsien Hsu, Tai-Wei Chang
{"title":"A voltage-mode boost DC-DC converter with a constant-duty-cycle pulse control","authors":"Chinder Wey, Chung-Hsien Hsu, Tai-Wei Chang","doi":"10.1109/LASCAS.2013.6518983","DOIUrl":"https://doi.org/10.1109/LASCAS.2013.6518983","url":null,"abstract":"The conventional voltage-mode hysteretic buck converters have the merit of fast response and yet stable operation. However, such merits cannot be extended to its counterpart boost converters. This is so simply because the waveforms of the input current and output voltage of buck version are in-phase, but they are out-of-phase in the boost version. Due to the design simplicity, this study presents a voltage-mode boost converter design. With the simple structure, the proposed converter achieves a good power efficiency, ranged from 85% to 93.52% for the load currents from 50mA to 300mA, and fast transient response, 6 μs for the load currents which are switched from 100 mA to 300 mA and from 300 mA to 100 mA.","PeriodicalId":190693,"journal":{"name":"2013 IEEE 4th Latin American Symposium on Circuits and Systems (LASCAS)","volume":"45 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114323992","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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