D. Cordova, P. Toledo, H. Klimach, S. Bampi, E. Fabris
{"title":"A 90 dB PSRR, 4 dBm EMI resistant MOSFET-Only Voltage Reference","authors":"D. Cordova, P. Toledo, H. Klimach, S. Bampi, E. Fabris","doi":"10.1109/LASCAS.2016.7451012","DOIUrl":"https://doi.org/10.1109/LASCAS.2016.7451012","url":null,"abstract":"Electromagnetic Interference (EMI) degrades the performance of voltage and current references, due to its finite Power Supply Rejection Ratio (PSRR). The design of a 90 dB PSRR, 4 dBm EMI resistant MOSFET-Only Voltage Reference is herein presented. The Voltage Reference is designed based on the Zero Temperature Coefficient (ZTC) transistor point. The high-PSRR is obtained using zero-VT transistors as active loads in the open and feedback loop of the circuit. The final circuit was designed in a 130 nm CMOS process and occupies around 0.014 mm2 of silicon area while consuming just 1.15 μW. Postlayout simulations present a 206 mV of Voltage Reference with a Temperature Coefficient of 321 ppm/° C, for the temperature range from -55 to 125 ° C. An EMI source of 4 dBm (1 Vpp) injected in the power supply, according to the Direct Power Injection (DPI) standard, yield in a maximum DC Shift and Peak-to-Peak ripple of -0.17 % and 822 μVpp, respectively.","PeriodicalId":129875,"journal":{"name":"2016 IEEE 7th Latin American Symposium on Circuits & Systems (LASCAS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123465743","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}
Amirhossein Kazemi, A. Ahmadi, S. Alirezaee, M. Ahmadi
{"title":"A modified synapse model for neuromorphic circuits","authors":"Amirhossein Kazemi, A. Ahmadi, S. Alirezaee, M. Ahmadi","doi":"10.1109/LASCAS.2016.7451011","DOIUrl":"https://doi.org/10.1109/LASCAS.2016.7451011","url":null,"abstract":"Nowadays, biological neural system modeling is extending to higher levels which have made it feasible to accomplish a better understanding of the brain behavior. In this regard, neurons, have been center of attention in terms of analysis and modeling. Synapses, on the other hand, are one of the most critical components in the central nervous system, which provide basis for the communication between neurons and are known as a main contributor to the system neuroplasticity. In this paper, we present a modified model for synaptic transmission (NMDA receptor) which is suitable for efficient simulations and also circuit implementations. To test integrity and validation of the simplified model, simulations results are presented. This model can be used for digital and/or analog implementations in large-scale biological neural system simulations. This approach provides advantage of higher speed and lower implementation costs yet demonstrating similar dynamic behaviors.","PeriodicalId":129875,"journal":{"name":"2016 IEEE 7th Latin American Symposium on Circuits & Systems (LASCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126330882","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":"Combined partial differential equation filtering and particle swarm optimization for noisy biomedical image segmentation","authors":"S. Lahmiri, M. Boukadoum","doi":"10.1109/LASCAS.2016.7451085","DOIUrl":"https://doi.org/10.1109/LASCAS.2016.7451085","url":null,"abstract":"This paper presents a sequential system to jointly denoise and segment an image contaminated with Gaussian noise. A fourth-order partial differential equation (PDE) filter is used for noise cancelling and particle swarm optimization (PSO) is used for segmentation. The system was tested on a chest X-ray image corrupted with different levels of Gaussian noise and, based on the Jaccard and Dice statistics, the proposed system outperformed nine other hybrid models that denoise and then segment the filtered image.","PeriodicalId":129875,"journal":{"name":"2016 IEEE 7th Latin American Symposium on Circuits & Systems (LASCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129168476","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":"MOS-only circuit design automation","authors":"Deniz Özenli, H. Kuntman","doi":"10.1109/LASCAS.2016.7451045","DOIUrl":"https://doi.org/10.1109/LASCAS.2016.7451045","url":null,"abstract":"This paper presents an approach to automate MOS-Only circuit design under the polynomial regression and surface fitting. The proposed scheme incorporates a unified model, which enables to improve simulation accuracy in standard SPICE and Cadence SPECTRE simulators during the MOS-Only designs. Furthermore, a piecewise polynomial regressive model of transconductance (gm) of the MOS transistors is presented in terms of VDS, channel width (W) and channel length (L) to increase automation efficiency. Exemplary results are given at high frequency operation to validate our model in both Cadence Spectre and LT-Spice as well.","PeriodicalId":129875,"journal":{"name":"2016 IEEE 7th Latin American Symposium on Circuits & Systems (LASCAS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117274605","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":"RNS reverse converters for moduli sets with dynamic ranges of 9n-bit","authors":"H. Pettenghi, R. Matos, A. S. Molahosseini","doi":"10.1109/LASCAS.2016.7451030","DOIUrl":"https://doi.org/10.1109/LASCAS.2016.7451030","url":null,"abstract":"In this paper, we extend the traditional 3-moduli set {2n, 2n - 1, 2n+1}, with an equivalent 3n-bit dynamic range, and propose a moduli set extension with a maximum dynamic range of 9n and improve the parallelism according to the requirements. This paper also introduces a novel moduli set to design efficient reverse converters by using modular operations of the form 26n - 1 in order to achieve at most 9n-bit. Experimental results suggest that area reductions up to 65.61% and speed up of 2.38 can be obtained with our proposal in comparison with the best solutions existing in the state-of-the-art with the same DR. The proposed converter allows fewer bits per channel in comparison with the most efficient solutions with smaller dynamic ranges.","PeriodicalId":129875,"journal":{"name":"2016 IEEE 7th Latin American Symposium on Circuits & Systems (LASCAS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121151913","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}
Nicolás Calarco, F. P. Quintian, A. Lutenberg, J. Lipovetzky
{"title":"Photoresponse and color dependent crosstalk in an annular imager for an NDB optical encoder","authors":"Nicolás Calarco, F. P. Quintian, A. Lutenberg, J. Lipovetzky","doi":"10.1109/LASCAS.2016.7451006","DOIUrl":"https://doi.org/10.1109/LASCAS.2016.7451006","url":null,"abstract":"In this work we introduce the full characterization of an Application-Specific Integrated Circuit (ASIC) sensor. The chip, fabricated in a standard 0.5μm channel length CMOS process, implements a light sensor having a programmable non-uniform detectivity. The response of the chip was studied for three different wavelengths. Also, a color dependent crosstalk analysis was carried out. This design is intended for a non-diffractive beam optical encoder, but the ideas presented in this work could be used in other custom light sensors. The crosstalk analysis improves the comprehension of this phenomenon in CMOS sensors.","PeriodicalId":129875,"journal":{"name":"2016 IEEE 7th Latin American Symposium on Circuits & Systems (LASCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115354325","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":"Matching networks for maximum efficiency in two and three coil wireless power transfer systems","authors":"Pablo Pérez-Nicoli, F. Silveira","doi":"10.1109/LASCAS.2016.7451048","DOIUrl":"https://doi.org/10.1109/LASCAS.2016.7451048","url":null,"abstract":"This work carries out a thorough study of the advantages of using general load matching networks in two and three coil systems. The presented theoretical analysis helps to understand the impact and application of each of the following approaches: adjusting the impedance seen from the load, using additional resonant coils or using both techniques together. A proof of concept system was optimized using a matching network and simulated, showing that the efficiency is improved compared to the case of commonly used resonating structures.","PeriodicalId":129875,"journal":{"name":"2016 IEEE 7th Latin American Symposium on Circuits & Systems (LASCAS)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117025243","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}
Daniel Marolt, J. Scheible, Göran Jerke, Vinko Marolt
{"title":"Analog layout automation via self-organization: Enhancing the novel SWARM approach","authors":"Daniel Marolt, J. Scheible, Göran Jerke, Vinko Marolt","doi":"10.1109/LASCAS.2016.7451008","DOIUrl":"https://doi.org/10.1109/LASCAS.2016.7451008","url":null,"abstract":"This paper enhances SWARM, a novel deterministic analog layout automation approach based on the idea of cellular automata. SWARM implements a decentralized interaction model in which responsive layout modules, covering basic circuit types, autonomously move, rotate and deform themselves to let constraint-compliant, compact layout solutions emerge from a synergetic flow of self-organization. With the ability to consider design constraints both implicitly and explicitly, SWARM joins the layout quality of procedural generators with the flexibility of optimization algorithms, combining these two kinds of automation into a “bottom-up meets top-down” flow. The new enhancements are demonstrated in an OTA example, depicting the power of SWARM and its enormous potential for future developments.","PeriodicalId":129875,"journal":{"name":"2016 IEEE 7th Latin American Symposium on Circuits & Systems (LASCAS)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125760728","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. L. Oliveira, Felipe Tuyama De Faria Barbosa, T. Curtinhas, L. Faria, J. F. Sousa
{"title":"A design flow for locally-clocked XBM asynchronous state machines using synchronous CAD tools","authors":"D. L. Oliveira, Felipe Tuyama De Faria Barbosa, T. Curtinhas, L. Faria, J. F. Sousa","doi":"10.1109/LASCAS.2016.7451057","DOIUrl":"https://doi.org/10.1109/LASCAS.2016.7451057","url":null,"abstract":"Controllers based on Synchronous Finite State Machines (SFSM) are widely used in the control unit design of complex digital systems. These systems can present serious problems related to the global clock. In this context, the asynchronous paradigm shows interesting features that fit as an alternative for the design, despite of the difficulties of the application of asynchronous logic. An interesting architecture for the Asynchronous Finite State Machines Asynchronous (AFSM) is based on local clock, because it reduces the requirements of asynchronous logic. This paper proposes a new architecture of local clock to AFSMs, which is described by a popular specification known as Extended Burst-Mode (XBM). This architecture has a better cycle time when compared to other local clock architectures. Also, the paper proposes a \"necessary and sufficient\" condition for the local clock AFSMs on the proposed architecture to be synthesized completely by the use of conventional tools. Through a case study, we present the architecture, its robustness, the synthesis procedure and compare it with other local clock architectures, highlighting its advantages.","PeriodicalId":129875,"journal":{"name":"2016 IEEE 7th Latin American Symposium on Circuits & Systems (LASCAS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128196361","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}
R. Conceição, Giovanni Avila, G. Corrêa, M. Porto, B. Zatt, L. Agostini
{"title":"Rate-distortion-complexity analysis for prediction unit modes in 3D-HEVC depth coding","authors":"R. Conceição, Giovanni Avila, G. Corrêa, M. Porto, B. Zatt, L. Agostini","doi":"10.1109/LASCAS.2016.7451066","DOIUrl":"https://doi.org/10.1109/LASCAS.2016.7451066","url":null,"abstract":"3D-HEVC achieves significant compression efficiency thanks to the addition of several tools and features for multiview and 3D video content on top of those already available in HEVC. However, such gains come at the cost of large increases in the encoding computational complexity, which is a problem for computationally and battery-constrained devices. As the use of each tool or feature yields different compression efficiency, those that do not contribute significantly should be the first to be disabled in a complexity-constrained system with limited computational resources. Thus, this paper presents two major analyses on the use of Prediction Unit (PU) modes in 3D-HEVC: a preliminary, statistical study and a Rate-Distortion-Complexity (RDC) analysis. The first study observed the occurrence of asymmetric and rectangular PU modes in depth maps, while the RDC analysis evaluated the impact caused by the deactivation of the least used modes during the encoding of depth maps, based on the results found in the preliminary study. Experimental results have shown that a computational complexity reduction of 9% can be achieved with a negligible rate-distortion penalty (0.1%) if the least used modes are disabled.","PeriodicalId":129875,"journal":{"name":"2016 IEEE 7th Latin American Symposium on Circuits & Systems (LASCAS)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133155784","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}