G. S. Gajani, F. Boschetti, D. Negrini, Raffaele Martellaccio, Giorgio Milanese, F. Bizzarri, A. Brambilla
{"title":"A lumped model of lymphatic systems suitable for large scale simulations","authors":"G. S. Gajani, F. Boschetti, D. Negrini, Raffaele Martellaccio, Giorgio Milanese, F. Bizzarri, A. Brambilla","doi":"10.1109/ECCTD.2015.7300034","DOIUrl":"https://doi.org/10.1109/ECCTD.2015.7300034","url":null,"abstract":"Even though the importance of the lymphatic System in the active regulation of body fluid balance, in the immune system and in cancer dissemination is well known, large scale models of its behaviour are still lacking. Specifically, while several distributed and lumped models of single elements of the lymphatic system have been proposed, models that can be used as subsystems to describe behaviour of large lymphatic networks using general purpose simulators are not yet available. In this paper we propose a lumped model, based on data available in current literature, that is implemented using standard mixed mode circuit representation syntax. This allows to build large and complex lymphatic networks and simulate their transient and steady state behaviour. The model presented in this paper is limited to the element known as lymphangion that is one of the main components in lymph transport. Since we do not have yet data regarding larger networks, we will limit for the time being our discussion to a short chain of lymphangions.","PeriodicalId":148014,"journal":{"name":"2015 European Conference on Circuit Theory and Design (ECCTD)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122831562","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":"System scenario framework evaluation on EFM32 using the H264/AVC encoder control structure","authors":"Y. H. Yassin, P. G. Kjeldsberg, F. Catthoor","doi":"10.1109/ECCTD.2015.7300121","DOIUrl":"https://doi.org/10.1109/ECCTD.2015.7300121","url":null,"abstract":"Hand held battery powered devices are becoming increasingly complex, with embedded applications that regularly demonstrate very dynamic behavior and requiring advanced functionality. To avoid prohibitively high power consumption, novel techniques are needed to handle the increased dynamicity and complexity, e.g., through use of system scenario based design. In this paper a framework for system scenario resource management is presented and evaluated with the H264/AVC encoder control structure on an EFM32 microcontroller. By using DFS as a system knob, we obtain significant power reductions for different system scenarios occurring dynamically while the application is running. The framework overhead is negligible.","PeriodicalId":148014,"journal":{"name":"2015 European Conference on Circuit Theory and Design (ECCTD)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130343063","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":"Linearization of synthesizable VCO-based ADCs using delta modulation","authors":"Vishnu Unnikrishnan, M. Vesterbacka","doi":"10.1109/ECCTD.2015.7300003","DOIUrl":"https://doi.org/10.1109/ECCTD.2015.7300003","url":null,"abstract":"VCO-based ADC is an attractive candidate for the synthesis of all-digital ADCs using standard cells. However, the non-linearity of a synthesizable VCO requires digital postprocessing to obtain good performance. We propose another solution where the input analog signal is pre-coded into a delta-modulated pulse stream which is used to drive a VCO-based converter. This causes the oscillator to operate at two distinct frequencies thereby eliminating the VCO non-linearity from the converter transfer function. A circuit is proposed that consists of a synthesized digital block realizing all the active parts of the circuit and a passive RC net used as an integrator. Spectre simulation of the netlist synthesized using a 65 nm standard cell library shows a performance of 8.2 bit ENOB over a 3 MHz bandwidth without using any digital post-processing.","PeriodicalId":148014,"journal":{"name":"2015 European Conference on Circuit Theory and Design (ECCTD)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128190212","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":"On fixed-point implementation of symmetric matrix inversion","authors":"Carl Ingemarsson, O. Gustafsson","doi":"10.1109/ECCTD.2015.7300068","DOIUrl":"https://doi.org/10.1109/ECCTD.2015.7300068","url":null,"abstract":"In this work we explore the trade-offs between established algorithms for symmetric matrix inversion for fixed-point hardware implementation. Inversion of symmetric positive definite matrices finds applications in many areas, e.g. in MIMO detection and adaptive filtering. We explore computational complexity and show simulation results where numerical properties are analyzed. We show that LDLT decomposition combined with equation system solving are the most promising algorithm for fixed-point hardware implementation. We further show that simply counting the number of operations does not establish a valid comparison between the algorithms as the required word lengths differ significantly.","PeriodicalId":148014,"journal":{"name":"2015 European Conference on Circuit Theory and Design (ECCTD)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117265995","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":"Multiconductor transmission line model with frequency dependent parameters in time domain","authors":"A. Wardzinska, W. Bandurski","doi":"10.1109/ECCTD.2015.7300004","DOIUrl":"https://doi.org/10.1109/ECCTD.2015.7300004","url":null,"abstract":"In the paper, we present a fast and effective method of modeling a coupled interconnect in the SPICE simulator by means of S-parameters. The paper presents an approach based on the method of successive approximations, but taking into account the dependence on the frequency of line parameters. The concept is to use a rational approximation of the matrix of per-unit-length parameter of the line calculated for each frequency. In our approach, we implemented the scattering parameters of the transmission line in the SPICE simulator.","PeriodicalId":148014,"journal":{"name":"2015 European Conference on Circuit Theory and Design (ECCTD)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123443811","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}
O. Z. Batur, Naci Pekcokguler, Günhan Dündar, M. Koca
{"title":"A high resolution and low jitter linear delay line for IR-UWB template pulse synchronization","authors":"O. Z. Batur, Naci Pekcokguler, Günhan Dündar, M. Koca","doi":"10.1109/ECCTD.2015.7300117","DOIUrl":"https://doi.org/10.1109/ECCTD.2015.7300117","url":null,"abstract":"In this paper, we present a very low jitter reconfigurable shunt capacitor delay line. The delay line produces configurable linear delay for pulse synchronization of high data rate coherent template based IR-UWB receivers. The delay line is composed of coarse and fine synchronization delay stages. The delay values of 52 pS/step, 17.5 pS/step and 4.5 pS/step and their combinations are possible with 32 control steps. 5 bit up/down counters with asynchronous reset are employed to achieve minimum pin number as well as fast configuration on the delay line. The maximum frequency of the input signal is 600 MHz. Incremental control steps can be configured in less than 1 nS. Long time additive jitter is measured as 2.3 pS.","PeriodicalId":148014,"journal":{"name":"2015 European Conference on Circuit Theory and Design (ECCTD)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121939866","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}
Razvan Puscasu, Pavel Brinzoi, L. Creosteanu, G. Brezeanu
{"title":"A high voltage current sense amplifier with extended input common mode range based on a low voltage operational amplifier cell","authors":"Razvan Puscasu, Pavel Brinzoi, L. Creosteanu, G. Brezeanu","doi":"10.1109/ECCTD.2015.7300078","DOIUrl":"https://doi.org/10.1109/ECCTD.2015.7300078","url":null,"abstract":"This paper presents a current sense amplifier (CSA) capable of performing measurements at high input common mode (CM) voltages independent of the power supply rail. The proposed circuit employs a fully low voltage amplifier cell, a correction block for maintaining the linearity of the input stage over the entire input CM and a protection circuit against high differential input voltages (DIFF). Furthermore, a trimming procedure that enables the use of typical polysilicon gain resistors without losing accuracy and precision is discussed. The proposed architecture has been implemented in a standard 0.25μm BCD technology and its performances have been confirmed by both simulations and measurements.","PeriodicalId":148014,"journal":{"name":"2015 European Conference on Circuit Theory and Design (ECCTD)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129797079","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":"On negative resistance oscillators as modified multi-vibrators","authors":"E. Lindberg, K. Murali, A. Tamasevicius","doi":"10.1109/ECCTD.2015.7300072","DOIUrl":"https://doi.org/10.1109/ECCTD.2015.7300072","url":null,"abstract":"A tutorial discussion of negative resistance oscillators based on simple RLC circuits is presented. Two cases are based on parallel RLC circuits and two cases are based on series RLC circuits. Distortion is minimized by introducing symmetry in the movement of the complex pole-pair of the small signal model.","PeriodicalId":148014,"journal":{"name":"2015 European Conference on Circuit Theory and Design (ECCTD)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128280679","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}
A. Kartci, U. E. Ayten, N. Herencsar, R. Sotner, J. Jerabek, K. Vrba
{"title":"Application possibilities of VDCC in general floating element simulator circuit","authors":"A. Kartci, U. E. Ayten, N. Herencsar, R. Sotner, J. Jerabek, K. Vrba","doi":"10.1109/ECCTD.2015.7300064","DOIUrl":"https://doi.org/10.1109/ECCTD.2015.7300064","url":null,"abstract":"In this study, a low-voltage design of a new general floating element simulator circuit for realizing floating frequency dependent negative resistor (FDNR), floating inductor (FI), floating capacitor (FC), and floating resistor (FR) simulator, depending on the selection of passive circuit elements, is described. The circuit employs two voltage differencing current conveyors (VDCCs) at low voltage levels (±0.45 V) and three passive components. It does not require any passive element matching. Moreover, the new general floating element simulator can be electronically controllable by changing the bias currents of the VDCCs or can be controlled through the grounded resistor or capacitors. Finally, using one of the described floating element simulator, i.e. FDNR, a fourth-order Butterworth characteristic band-pass filter is simulated via PSPICE using 90 nm, level 7 PTM CMOS technology parameters. The simulations agree with the theoretical analysis.","PeriodicalId":148014,"journal":{"name":"2015 European Conference on Circuit Theory and Design (ECCTD)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125604053","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":"Modelling squeeze film damping in packaged energy harvesters","authors":"F. Ohlsson, Erik Svensson, C. Rusu","doi":"10.1109/ECCTD.2015.7300115","DOIUrl":"https://doi.org/10.1109/ECCTD.2015.7300115","url":null,"abstract":"We investigate the effects of fluidic damping on MEMS packaged energy harvesters using numerical simulations in COMSOL Multiphysics. In particular, we compare two models for including squeeze film damping in the case where the harvester is operating close to a wall; an equivalent mass damping based on approximate modal coefficients and the numerical solution of the Reynolds equation in the air gap between the wall and the structure. The models are evaluated on a bridge design harvester intended for automotive applications.","PeriodicalId":148014,"journal":{"name":"2015 European Conference on Circuit Theory and Design (ECCTD)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123817723","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}