Pub Date : 2015-06-25DOI: 10.1109/MIXDES.2015.7208567
M. Frankiewicz, M. Jableka, K. Boron, Patryk Urban, Janusz Guzdzik, A. Ryszko, George Jiang
The paper describes methodology for modelling and simulative estimation of sensitivity and range of ISM band Remote Keyless Entry transmitter-receiver system for automotive applications. The method is based on electrical simulation including PCB extraction data and parameters statistical distribution to evaluate best- and worst case scenarios. Both transmitter and receiver circuits are considered, as well as link environmental conditions. Examples of results are given for presented methodology.
{"title":"Method for 315/433 MHz Remote Keyless Entry sensitivity and range statistical analysis for automotive applications","authors":"M. Frankiewicz, M. Jableka, K. Boron, Patryk Urban, Janusz Guzdzik, A. Ryszko, George Jiang","doi":"10.1109/MIXDES.2015.7208567","DOIUrl":"https://doi.org/10.1109/MIXDES.2015.7208567","url":null,"abstract":"The paper describes methodology for modelling and simulative estimation of sensitivity and range of ISM band Remote Keyless Entry transmitter-receiver system for automotive applications. The method is based on electrical simulation including PCB extraction data and parameters statistical distribution to evaluate best- and worst case scenarios. Both transmitter and receiver circuits are considered, as well as link environmental conditions. Examples of results are given for presented methodology.","PeriodicalId":188240,"journal":{"name":"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133386083","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}
Pub Date : 2015-06-25DOI: 10.1109/MIXDES.2015.7208588
P. Górecki
In this paper project and measured characteristics of the laptop's power supply station with photovoltaic module are presented. This device consists of two switch-mode voltage regulators, photovoltaic module and the lead-acid battery. In the following sections step-down and step-up switch-mode voltage regulators are described and the measured by the author characteristics of voltage regulators and the whole power supply station are presented.
{"title":"Voltage regulators for the laptop's power supply station with photovoltaic modules","authors":"P. Górecki","doi":"10.1109/MIXDES.2015.7208588","DOIUrl":"https://doi.org/10.1109/MIXDES.2015.7208588","url":null,"abstract":"In this paper project and measured characteristics of the laptop's power supply station with photovoltaic module are presented. This device consists of two switch-mode voltage regulators, photovoltaic module and the lead-acid battery. In the following sections step-down and step-up switch-mode voltage regulators are described and the measured by the author characteristics of voltage regulators and the whole power supply station are presented.","PeriodicalId":188240,"journal":{"name":"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133411967","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}
Pub Date : 2015-06-25DOI: 10.1109/MIXDES.2015.7208528
A. Hera, O. Boncalo, Constantina-Elena Gavriliu, A. Amaricai, V. Savin, D. Declercq, Ghaffari Fakhreddine
This paper presents an analysis of existing stopping criteria for layered architecture used for quasi-cyclic (QC) LDPC decoders. Furthermore, it proposes a novel imprecise method for early termination in layered decoders. The analysis is performed under the same framework in order to provide a fair and accurate comparison between existing methods, and our new solution. The developed hardware modules have been designed independently from the decoder architecture, with the only constraint that the decoder scheduling is layered. Synthesis estimates for Xilinx Virtex-7 devices and the decoding performance analysis indicate that the new stopping criterion presents the best cost/performance trade-off for most of the considered LDPC codes.
{"title":"Analysis and implementation of on-the-fly stopping criteria for layered QC LDPC decoders","authors":"A. Hera, O. Boncalo, Constantina-Elena Gavriliu, A. Amaricai, V. Savin, D. Declercq, Ghaffari Fakhreddine","doi":"10.1109/MIXDES.2015.7208528","DOIUrl":"https://doi.org/10.1109/MIXDES.2015.7208528","url":null,"abstract":"This paper presents an analysis of existing stopping criteria for layered architecture used for quasi-cyclic (QC) LDPC decoders. Furthermore, it proposes a novel imprecise method for early termination in layered decoders. The analysis is performed under the same framework in order to provide a fair and accurate comparison between existing methods, and our new solution. The developed hardware modules have been designed independently from the decoder architecture, with the only constraint that the decoder scheduling is layered. Synthesis estimates for Xilinx Virtex-7 devices and the decoding performance analysis indicate that the new stopping criterion presents the best cost/performance trade-off for most of the considered LDPC codes.","PeriodicalId":188240,"journal":{"name":"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130556364","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}
Pub Date : 2015-06-25DOI: 10.1109/MIXDES.2015.7208598
D. Kacperski, Michal Wlodarczyk, K. Grabowski
The first galvanometer motors were developed at the beginning of 20th century. However, due to various design limitations, initially they were mainly used as indicating or recording devices. Later, after new construction concepts were introduced, it become possible to use them for other more advanced purposes. They have become a very important element of various precise positioning systems, where both high accuracy and big motor's speed was required. Unfortunately, off-the-shelf solutions are designed mainly for laser beam controlling systems. For this reason it is not easy to apply them for inverse problem, such as imaging field projection. This paper presents the design and development process of a specific galvanometric system for image field controlling.
{"title":"Custom design of galvanometric motor for large mirror","authors":"D. Kacperski, Michal Wlodarczyk, K. Grabowski","doi":"10.1109/MIXDES.2015.7208598","DOIUrl":"https://doi.org/10.1109/MIXDES.2015.7208598","url":null,"abstract":"The first galvanometer motors were developed at the beginning of 20th century. However, due to various design limitations, initially they were mainly used as indicating or recording devices. Later, after new construction concepts were introduced, it become possible to use them for other more advanced purposes. They have become a very important element of various precise positioning systems, where both high accuracy and big motor's speed was required. Unfortunately, off-the-shelf solutions are designed mainly for laser beam controlling systems. For this reason it is not easy to apply them for inverse problem, such as imaging field projection. This paper presents the design and development process of a specific galvanometric system for image field controlling.","PeriodicalId":188240,"journal":{"name":"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122397254","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}
Pub Date : 2015-06-25DOI: 10.1109/MIXDES.2015.7208591
R. Wojtyna
In CMOS electronics using differential pairs, input signals are usually supplied to gate terminals of MOS transistors creating the pair. Then, the tail terminal of the pair is used to ensure the required bias needed for proper operation of the transistors. In this paper, we show that roles of the gate and tail terminals can be changed. This implies, among others, that the tail can be used as a terminal delivering the input signal. In such a case, new possibilities of decreasing the circuit power consumption occur, especially when making use of current mode techniques. This is because the power consumption can drop to zero if the input signal disappears. Combining current mode technique with the differential one enables to achieve important circuit advantages like the required small headroom and simplicity of realizing signal summation with the ability of a considerable reduction of common-mode effects, characteristic of differential methods. The last feature allows us to process even very weak signals, like it is the case at input stages of the popular differential amplifiers. Necessary conditions for successful implementation of the proposed idea have been explained. Example of a simple CMOS circuit operating according to theoretical predictions made is also presented.
{"title":"Differential-pair-based current-mode analog signal processing","authors":"R. Wojtyna","doi":"10.1109/MIXDES.2015.7208591","DOIUrl":"https://doi.org/10.1109/MIXDES.2015.7208591","url":null,"abstract":"In CMOS electronics using differential pairs, input signals are usually supplied to gate terminals of MOS transistors creating the pair. Then, the tail terminal of the pair is used to ensure the required bias needed for proper operation of the transistors. In this paper, we show that roles of the gate and tail terminals can be changed. This implies, among others, that the tail can be used as a terminal delivering the input signal. In such a case, new possibilities of decreasing the circuit power consumption occur, especially when making use of current mode techniques. This is because the power consumption can drop to zero if the input signal disappears. Combining current mode technique with the differential one enables to achieve important circuit advantages like the required small headroom and simplicity of realizing signal summation with the ability of a considerable reduction of common-mode effects, characteristic of differential methods. The last feature allows us to process even very weak signals, like it is the case at input stages of the popular differential amplifiers. Necessary conditions for successful implementation of the proposed idea have been explained. Example of a simple CMOS circuit operating according to theoretical predictions made is also presented.","PeriodicalId":188240,"journal":{"name":"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125998495","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}
Pub Date : 2015-06-25DOI: 10.1109/MIXDES.2015.7208527
T. Talaśka, R. Dlugosz
The paper presents a new, mixed analog-digital, circuit for analog sorting signals. In comparison to other circuits of this type the proposed solution offers large versatility. The main objective is its application in Neural Gas (NG) learning algorithm used to train unsupervised neural networks (NNs). However, the circuit can also be used in nonlinear processing of analog signals. It is capable of performing simultaneously several typical nonlinear operations that include Min, Max and Median filtering. The circuit offers high accuracy, however the difference between signals that can be distinguished depends on the steepness of a reference ramp signal. For example, the circuit it able to distinguish signals that differ by 10 nA if the assumed time is larger than 1 μs. Since a typical number of neurons in the NN exceeds 100-200, the circuit has been designed to sort so many input signals. The sorting operation provides us values of particular output signals, as well as the information which inputs signals deliver particular output signals. This second feature is used in case of the application of the circuit in NN. The system was implemented in the TSMC 180nm CMOS technology and verified in the HSpice environment. For 8 inputs varying in between 1 to 10 μA the circuit dissipates an average power of 250 μW.
{"title":"Analog sorting circuit for the application in self-organizing neural networks based on neural gas learning algorithm","authors":"T. Talaśka, R. Dlugosz","doi":"10.1109/MIXDES.2015.7208527","DOIUrl":"https://doi.org/10.1109/MIXDES.2015.7208527","url":null,"abstract":"The paper presents a new, mixed analog-digital, circuit for analog sorting signals. In comparison to other circuits of this type the proposed solution offers large versatility. The main objective is its application in Neural Gas (NG) learning algorithm used to train unsupervised neural networks (NNs). However, the circuit can also be used in nonlinear processing of analog signals. It is capable of performing simultaneously several typical nonlinear operations that include Min, Max and Median filtering. The circuit offers high accuracy, however the difference between signals that can be distinguished depends on the steepness of a reference ramp signal. For example, the circuit it able to distinguish signals that differ by 10 nA if the assumed time is larger than 1 μs. Since a typical number of neurons in the NN exceeds 100-200, the circuit has been designed to sort so many input signals. The sorting operation provides us values of particular output signals, as well as the information which inputs signals deliver particular output signals. This second feature is used in case of the application of the circuit in NN. The system was implemented in the TSMC 180nm CMOS technology and verified in the HSpice environment. For 8 inputs varying in between 1 to 10 μA the circuit dissipates an average power of 250 μW.","PeriodicalId":188240,"journal":{"name":"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123196782","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}
Pub Date : 2015-06-25DOI: 10.1109/MIXDES.2015.7208600
Lukasz Dykcik, D. Kacperski, P. Sekalski
This paper describes design and construction of a laser projector. Laser projectors are perfect for displaying graphics that need to catch our attention. In this paper we present the novel approach to animation which can later displayed by the self-made laser projector. The laser projector presented in paper is composed of galvanometer mirrors, green laser, microcontroller and a dedicated software running on it. Galvanometer mirrors are responsible for reflecting the incoming green laser beam in a precise way that will project a picture on the screen. The microcontroller synchronizes mirror movements with signals from its built-in digital-to-analogue converter. Additionally, it reads and processes a file containing picture that will be shown.
{"title":"Mirror galvanometer-based laser projector","authors":"Lukasz Dykcik, D. Kacperski, P. Sekalski","doi":"10.1109/MIXDES.2015.7208600","DOIUrl":"https://doi.org/10.1109/MIXDES.2015.7208600","url":null,"abstract":"This paper describes design and construction of a laser projector. Laser projectors are perfect for displaying graphics that need to catch our attention. In this paper we present the novel approach to animation which can later displayed by the self-made laser projector. The laser projector presented in paper is composed of galvanometer mirrors, green laser, microcontroller and a dedicated software running on it. Galvanometer mirrors are responsible for reflecting the incoming green laser beam in a precise way that will project a picture on the screen. The microcontroller synchronizes mirror movements with signals from its built-in digital-to-analogue converter. Additionally, it reads and processes a file containing picture that will be shown.","PeriodicalId":188240,"journal":{"name":"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115561899","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}
Pub Date : 2015-06-25DOI: 10.1109/MIXDES.2015.7208562
C. Widemann, Harry Weber, S. Schatz, W. Mathis
In this contribution, two different approaches to the analysis of nonlinear analog circuits in the frequency domain using scattering variables are examined, the nonlinear scattering parameters (S-parameters) based on the Volterra series and the X-parameters. After the theoretical backgrounds are shortly recapitulated, the benefits and drawbacks of each method are outlined. Both methods are applied to an exemplary weak nonlinear circuit and the obtained results are compared. As a result, it is concluded that the X-parameter approach can be expanded in order to increase the accuracy of the approach in dependency of the small signal.
{"title":"A comparison of the Volterra series-based nonlinear S-parameters and X-parameters","authors":"C. Widemann, Harry Weber, S. Schatz, W. Mathis","doi":"10.1109/MIXDES.2015.7208562","DOIUrl":"https://doi.org/10.1109/MIXDES.2015.7208562","url":null,"abstract":"In this contribution, two different approaches to the analysis of nonlinear analog circuits in the frequency domain using scattering variables are examined, the nonlinear scattering parameters (S-parameters) based on the Volterra series and the X-parameters. After the theoretical backgrounds are shortly recapitulated, the benefits and drawbacks of each method are outlined. Both methods are applied to an exemplary weak nonlinear circuit and the obtained results are compared. As a result, it is concluded that the X-parameter approach can be expanded in order to increase the accuracy of the approach in dependency of the small signal.","PeriodicalId":188240,"journal":{"name":"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131155091","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}
Pub Date : 2015-06-25DOI: 10.1109/MIXDES.2015.7208552
Filipe Araújo, Miguel D. Fernandes, J. Pinto, L. Oliveira, J. Oliveira
A wideband CMOS receiver front-end for radio applications operating between 300 MHz and 900 MHz is presented. In order to obtain channel selection with image-rejection and out-of-band interferers attenuation, both low-noise amplifier (LNA) and mixer incorporate a N-Path signal processing technique. The effectiveness of this N-Path filtering is investigated by comparing distinct combinations of clock phases and respective duty cycle. Using a standard 130 nm CMOS technology and a supply voltage of 1.2 V, it was possible to obtain a voltage gain greater than 28 dB, a noise figure (NF) lower than 6.05 dB and IIP3 > -1.54 dBm.
{"title":"Wideband CMOS RF front-end receiver with integrated filtering","authors":"Filipe Araújo, Miguel D. Fernandes, J. Pinto, L. Oliveira, J. Oliveira","doi":"10.1109/MIXDES.2015.7208552","DOIUrl":"https://doi.org/10.1109/MIXDES.2015.7208552","url":null,"abstract":"A wideband CMOS receiver front-end for radio applications operating between 300 MHz and 900 MHz is presented. In order to obtain channel selection with image-rejection and out-of-band interferers attenuation, both low-noise amplifier (LNA) and mixer incorporate a N-Path signal processing technique. The effectiveness of this N-Path filtering is investigated by comparing distinct combinations of clock phases and respective duty cycle. Using a standard 130 nm CMOS technology and a supply voltage of 1.2 V, it was possible to obtain a voltage gain greater than 28 dB, a noise figure (NF) lower than 6.05 dB and IIP3 > -1.54 dBm.","PeriodicalId":188240,"journal":{"name":"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130660953","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}
Pub Date : 2015-06-25DOI: 10.1109/MIXDES.2015.7208572
A. Borys
In this paper, it is shown that a description of mildly nonlinear circuits with an operator o introduced in a paper entitled “Distortion in variable-capacitance diodes” by R. G. Meyer and M. L. Stephens is not correct. The error occurring in this article was then replicated in publications of Palumbo and Pennisi on harmonic distortion calculation in integrated CMOS amplifiers, and recently in a paper about “Distortion analysis of a three-terminal MOS-based discrete-time parametric amplifier” by H. Shrimali and S. Chatterjee. In this paper, we derive a correct form of the discussed description.
本文证明了R. G. Meyer和M. L. Stephens在“变电容二极管的畸变”一文中引入的带有算子0的轻度非线性电路的描述是不正确的。本文中出现的错误随后在Palumbo和Pennisi关于集成CMOS放大器谐波失真计算的出版物中得到了重复，最近在H. Shrimali和S. Chatterjee关于“基于mos的三端离散时间参数放大器的失真分析”的论文中也得到了重复。在本文中，我们导出了所讨论的描述的一种正确形式。
{"title":"Strange history of an operator o","authors":"A. Borys","doi":"10.1109/MIXDES.2015.7208572","DOIUrl":"https://doi.org/10.1109/MIXDES.2015.7208572","url":null,"abstract":"In this paper, it is shown that a description of mildly nonlinear circuits with an operator o introduced in a paper entitled “Distortion in variable-capacitance diodes” by R. G. Meyer and M. L. Stephens is not correct. The error occurring in this article was then replicated in publications of Palumbo and Pennisi on harmonic distortion calculation in integrated CMOS amplifiers, and recently in a paper about “Distortion analysis of a three-terminal MOS-based discrete-time parametric amplifier” by H. Shrimali and S. Chatterjee. In this paper, we derive a correct form of the discussed description.","PeriodicalId":188240,"journal":{"name":"2015 22nd International Conference Mixed Design of Integrated Circuits & Systems (MIXDES)","volume":"225 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127209151","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}
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