{"title":"An Overview of Automatic Antenna Impedance Matching for Mobile Communications","authors":"D. Lauder, Yichuang Sun","doi":"10.1109/ECCTD49232.2020.9218350","DOIUrl":"https://doi.org/10.1109/ECCTD49232.2020.9218350","url":null,"abstract":"This paper reviews recent developments in automatic impedance matching and antenna tuning for wireless and mobile communications. UHF Tunable Matching Network (TMN) topologies are considered together with electronic device technologies for tuning a TMN and automatic tuning algorithms. Integrated Power Amplifier (PA) matching/antenna tuning, downlink (receive only) antenna tuning and antenna tuning for Multiple Input Multiple Output (MIMO) are also included.","PeriodicalId":336302,"journal":{"name":"2020 European Conference on Circuit Theory and Design (ECCTD)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123801879","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}
Iosif-Angelos Fyrigos, V. Ntinas, Michail-Antisthenis I. Tsompanas, Stavros Kitsios, G. Sirakoulis, D. Tsoukalas, A. Adamatzky
{"title":"Implementation and Optimization of Chemical Logic Gates Using Memristive Cellular Automata","authors":"Iosif-Angelos Fyrigos, V. Ntinas, Michail-Antisthenis I. Tsompanas, Stavros Kitsios, G. Sirakoulis, D. Tsoukalas, A. Adamatzky","doi":"10.1109/ECCTD49232.2020.9218330","DOIUrl":"https://doi.org/10.1109/ECCTD49232.2020.9218330","url":null,"abstract":"By utilizing biologically inspired approaches, a wide range of complex and computationally intensive problems can be transformed to simpler and more appropriate forms to be easily solved by unconventional computing systems. A well-known computing platform with such characteristics is the Cellular Automata paradigm, where a spatial-extended network of nodes, with local interactions, exhibit emerging computations. In such CA networks, the application of nanodevices, like memristors, with inherent novel abilities, like memory storing and computing capabilities, together with nonlinear interactions is promising for the advancement of computation. In this work, a memristor-based Cellular Automaton (MemCA) is developed for the implementation and optimization of topological chemical logic gates. The proposed MemCA is inspired by the behaviour of the biological organism Physarum Polycephalum that firstly spreads to reach nutrients in its environment and afterwards shrinks to optimize its energy requirements, while performing biochemical oscillations to accomplish these tasks. In a similar way, the MemCA simulates Physarum's spreading to perform the spatial operation of the chemical logic gate, while Physarum's shrinking was utilised to further optimise the required area of the gate.","PeriodicalId":336302,"journal":{"name":"2020 European Conference on Circuit Theory and Design (ECCTD)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124481759","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":"Integer Convolutional Neural Networks with Boolean Activations: The BoolHash Algorithm","authors":"Grigor Gatchev, V. Mollov","doi":"10.1109/ECCTD49232.2020.9218306","DOIUrl":"https://doi.org/10.1109/ECCTD49232.2020.9218306","url":null,"abstract":"Improving the efficiency of convolutional neural networks (CNN) often relies on integer-only algorithms. Using boolean activations can bring further inference speed gain, and can make easier the design of CNN-specific ASICs. A convolutional algorithm called BoolHash that we propose here can additionally increase the inference speed several times, and permits functionalities that usually require more complex processing. A CNN model with 16-bit input weights, 8-bit filter weights and 1-bit activations was used to compare the speed of BoolHash to that of a classic weight-adder convolutional algorithm.","PeriodicalId":336302,"journal":{"name":"2020 European Conference on Circuit Theory and Design (ECCTD)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122792059","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":"Improving Aliasing Rejection by Inserting Additional Zeros into Folding Bands Using Simple Filters","authors":"G. Jovanovic-Dolecek, L. Dolecek","doi":"10.1109/ECCTD49232.2020.9218403","DOIUrl":"https://doi.org/10.1109/ECCTD49232.2020.9218403","url":null,"abstract":"This paper presents a novel multiplierless two-stage comb-based decimation filter with an improved aliasing rejection, in comparison with the original comb filter. This is achieved by inserting additional zeros into comb folding bands provided by additional comb filters of different lengths in the second stage, and the cascaded modified combs in the first stage. The parameters of design are the same as in two-stage comb, i.e. the decimation factors of the first and second stages and the order of comb. The efficient structures are also discussed. Finally, the comparisons with the methods from literature are presented. The proposed method is convenient for the decimation factors which can be presented as a product of two integers.","PeriodicalId":336302,"journal":{"name":"2020 European Conference on Circuit Theory and Design (ECCTD)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131411742","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":"Multylayer perceptron representation by index matrices with elements in a fixed interval","authors":"Krassimir Atanasov, S. Sotirov","doi":"10.1109/ECCTD49232.2020.9218374","DOIUrl":"https://doi.org/10.1109/ECCTD49232.2020.9218374","url":null,"abstract":"Classical neural networks have transfer functions in their structures. These functions are different in solving different tasks and in different types of neural networks. In this paper, the authors use the tools of indexed matrices and one of the operators to change the properties of neural networks.","PeriodicalId":336302,"journal":{"name":"2020 European Conference on Circuit Theory and Design (ECCTD)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125674522","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":"A Low-Power Wide Supply Range Delay-Line Based IC for Amperometric Measurement","authors":"A. Nag, R. Dahiya, S. Mitra","doi":"10.1109/ECCTD49232.2020.9218415","DOIUrl":"https://doi.org/10.1109/ECCTD49232.2020.9218415","url":null,"abstract":"A novel Delay Line based bidirectional readout IC is proposed for Potentiostatic measurement which allows time-domain analysis of sensor current and offers highly linear (R2=0.9998), low noise and low power implementation. The architecture is implemented in 0.18μm process and can operate for two distinct input range (IR) ±10nA/±10μA, while the Delay Line consumes 3.6μW/150.7μW power, respectively. Due to its digital intensive nature, the architecture supports a wide variation in supply voltage 0.6V-1.8V, while ensuring little deviation of sensitivity.","PeriodicalId":336302,"journal":{"name":"2020 European Conference on Circuit Theory and Design (ECCTD)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121869127","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":"A Flipping Active-Diode Rectifier for Piezoelectric-Vibration Energy-Harvesting","authors":"Wan-Ling Wu, Ching-Yuan Yang, Dung-An Wang","doi":"10.1109/ECCTD49232.2020.9218313","DOIUrl":"https://doi.org/10.1109/ECCTD49232.2020.9218313","url":null,"abstract":"In the paper, we discuss piezoelectric-vibration energy-harvesting flipping active-diode rectifiers, including the full bridge rectifier (FBR), the active diode rectifier, the switch only rectifier (SOR), and the flipping-capacitor rectifier (FCR). The energy harvesting circuits were implemented in 0.35-μm CMOS process. Compared to the transferred-power ability of the conventional FBR, the simulation improved factors of an active diode rectifier, SOR and FCR can reach up to 2x, 3.2x and 4.6x at an excitation frequency of 100 Hz, respectively.","PeriodicalId":336302,"journal":{"name":"2020 European Conference on Circuit Theory and Design (ECCTD)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124819921","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}
T. Addabbo, A. Fort, Riccardo Moretti, M. Mugnaini, Hadis Takaloo, V. Vignoli
{"title":"Design of Area-Efficient Physical Unclonable Functions Derived From CNNs: Trade-Offs and Optimization","authors":"T. Addabbo, A. Fort, Riccardo Moretti, M. Mugnaini, Hadis Takaloo, V. Vignoli","doi":"10.1109/ECCTD49232.2020.9218316","DOIUrl":"https://doi.org/10.1109/ECCTD49232.2020.9218316","url":null,"abstract":"We discuss the design of an area-efficient CMOS analog core-cell implementing a PUF derived from a two-neurons Cellular Neural Network (CNN). The study is based on both theoretical modeling and numerical simulations, proposing circuit solutions in which the area consumption is strongly reduced by eliminating state capacitors and relying on distributed parasitic capacitances only.","PeriodicalId":336302,"journal":{"name":"2020 European Conference on Circuit Theory and Design (ECCTD)","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129723048","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":"A Simulation Tool for Analysis of Oscillator Ensembles Defined by Kuramoto Model","authors":"M. Gourary, S. Rusakov","doi":"10.1109/ECCTD49232.2020.9218382","DOIUrl":"https://doi.org/10.1109/ECCTD49232.2020.9218382","url":null,"abstract":"The paper proposes a tool for the numerical simulation of the behavior of coupled oscillators based on Kuramoto model. The approach is based on constructing electrical circuit model for which Kirchhoff equations coincide with Kuramoto equations of the oscillator ensemble. A procedure to generate Spice netlist for the circuit has been developed. The procedure is based on the initial description of the Kuramoto model in the form of Matlab data structures.","PeriodicalId":336302,"journal":{"name":"2020 European Conference on Circuit Theory and Design (ECCTD)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130078349","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}
P. Bisiaux, E. Blokhina, Eugene Koskin, T. Siriburanon, D. Galayko
{"title":"Design of a 1.5 GHz Low jitter DCO Ring in 28 nm CMOS Process","authors":"P. Bisiaux, E. Blokhina, Eugene Koskin, T. Siriburanon, D. Galayko","doi":"10.1109/ECCTD49232.2020.9218352","DOIUrl":"https://doi.org/10.1109/ECCTD49232.2020.9218352","url":null,"abstract":"The immunity of jitter with respect to supply voltage is one of the desirable characteristics of digitally controlled oscillators (DCO) for clocking applications. This paper presents a design of such an oscillator with a high frequency resolution and small area in 28 nm technology. In order to reduce the dependence of the oscillator frequency on its voltage supply, differential amplifiers are used as inverters (delay cells) and a bias circuit with a stable voltage output is employed to bias the oscillator. From post-layout simulations, this DCO achieves a dynamic range from 1.13 to 1.54 GHz with the use of differential delay cells, the variation of the output frequency is less than 4.5% over all the frequency range, for VDD variation of 10%. The frequency control has 9.2 bits, giving an average frequency step of 722 kHz. This DCO achieves a phase noise of -74 dBc/Hz@1MHz or an jitter equivalence of 2.3 ps. The maximal power consumption of this DCO at maximum frequency is 840 μW, which is a low figure comparing to the state-of-the-art implementation with typical power of sub-milliwatts for the similar frequency range.","PeriodicalId":336302,"journal":{"name":"2020 European Conference on Circuit Theory and Design (ECCTD)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126747351","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}