This work illustrates an educational project flow of an electronic system. This system is develop... more This work illustrates an educational project flow of an electronic system. This system is developed to support applications in which there are the need to measure motion parameters and transmit them to a remote unit for real-time teleprocessing. In order to be useful in many operative contexts, the system is flexible, compact, and lightweight. It integrates a tri-axial inertial sensors, a GPS module, a wireless transceiver and can drive a pocket camera. Data acquisition and packetization are handled in order to increase data throughput on radio bridge and to minimize power consumption. A trajectory reconstruction algorithm, implementing the Kalman-filter technique, allows to obtain real-time body tracking using only inertial sensors. Thanks to a graphical user interface it is possible to remotely control the system operations and to display the motion data. Following this detailed design procedure it is possible to reproduce this platform easily adapting it to your own aim.
In this article the effects of radiations on discrete and complex electronic devices were analyze... more In this article the effects of radiations on discrete and complex electronic devices were analyzed. In the preliminary phase of this work the space environment was studied, referring to radiations and their effects on the matter and on electronic devices. The main radiation-hardening techniques were investigated, in particular the "by-layout" techniques. One of these rad-hard devices is the edgeless transistor (ELT). A static electrical characterization, before the irradiation (fresh condition), was conducted on these devices in order to evaluate their features with respect to the standard ones (STD). The measures have highlighted the differences between the ELT types, confirming the main features of ELTs, as shown in literature as well. Another investigation regarded the irradiation test of some 8Mbit TOPAZ flash memories using Boron ions. These test were conducted both in the active state (during the reading of memory cells) and in the passive state (in standby). Thanks ...
This paper describes the kinematic error model of Navi-Robot, a novel hybrid parallel/serial robo... more This paper describes the kinematic error model of Navi-Robot, a novel hybrid parallel/serial robotic system, designed to be used for several medical applications. This calibration technique allows modeling the stiffness of the structure taking into account the influence of non-perfect geometry of serial and parallel chains caused by manufacturing errors and mechanical tolerances. The experimentally identified errors have been used to predict, and compensate for, end-point errors as a function of configuration and loads applied, improving the system absolute accuracy. Experimental results show that the adopted methodology is able to effectively correct for the system errors with a significant improvement of robot accuracy. After calibration, the mean/maximum position errors on the end-effector are reduced from 0.743 mm/1.236 mm respectively, to 0.503 mm/0.902 mm.
We present an innovative approach to study the interaction between oblique solitons, using nonlin... more We present an innovative approach to study the interaction between oblique solitons, using nonlinear transmission lines, based on Cellular Neural Network (CNN) paradigm. A single transmission line consists of a 1D array of cells that interact with neighboring cells, through both linear and nonlinear connections. Each cell is controlled by a nonlinear Ordinary Differential Equation, in particular the Korteweg de Vries equation, which defines the cell status and behavior. Two typologies of CNN transmission lines are modelled: crisscross and ring lines. In order to solve KdV equations two different methods are used: 4th-order Runge-Kutta and Forward Euler methods. This is done to evaluate their accuracy and stability with the purpose of implementing CNN transmission lines on embedded systems such as FPGA and microcontrollers. Simulation/analysis Graphic User Interface platforms are designed to conduct numerical simulations and to display elaboration results. From this analysis it is po...
In this paper we present experimental evidence for single-electron phenomena in solid-state memor... more In this paper we present experimental evidence for single-electron phenomena in solid-state memories based on silicon nanocrystals as storage elements. The stepwise evolution of the channel current of a written memory cell biased in the subthreshold regime is monitored by means of a purposely designed low noise acquisition system with a bandwidth of 1 kHz. Each channel current step-up is ascribed to a single-electron emission from the silicon nanocrystal to the silicon substrate and each current step-down is ascribed to a single-electron capture from the silicon substrate into the silicon nanocrystal. The effect of the measurement system bandwidth on the detection of single-electron events is discussed and a procedure for extracting the threshold voltage shift associated to these events is proposed. It is shown that single-electron charging and discharging events in a memory cell with an area of 4.5 x 10(-10) cm2 can cause threshold voltage shift at room-temperature of the order of ...
Technical Digest. Summaries of Papers Presented at the Conference on Lasers and Electro-Optics. Conference Edition. 1998 Technical Digest Series, Vol.6 (IEEE Cat. No.98CH36178), 1998
This work illustrates an educational project flow of an electronic system. This system is develop... more This work illustrates an educational project flow of an electronic system. This system is developed to support applications in which there are the need to measure motion parameters and transmit them to a remote unit for real-time teleprocessing. In order to be useful in many operative contexts, the system is flexible, compact, and lightweight. It integrates a tri-axial inertial sensors, a GPS module, a wireless transceiver and can drive a pocket camera. Data acquisition and packetization are handled in order to increase data throughput on radio bridge and to minimize power consumption. A trajectory reconstruction algorithm, implementing the Kalman-filter technique, allows to obtain real-time body tracking using only inertial sensors. Thanks to a graphical user interface it is possible to remotely control the system operations and to display the motion data. Following this detailed design procedure it is possible to reproduce this platform easily adapting it to your own aim.
In this article the effects of radiations on discrete and complex electronic devices were analyze... more In this article the effects of radiations on discrete and complex electronic devices were analyzed. In the preliminary phase of this work the space environment was studied, referring to radiations and their effects on the matter and on electronic devices. The main radiation-hardening techniques were investigated, in particular the "by-layout" techniques. One of these rad-hard devices is the edgeless transistor (ELT). A static electrical characterization, before the irradiation (fresh condition), was conducted on these devices in order to evaluate their features with respect to the standard ones (STD). The measures have highlighted the differences between the ELT types, confirming the main features of ELTs, as shown in literature as well. Another investigation regarded the irradiation test of some 8Mbit TOPAZ flash memories using Boron ions. These test were conducted both in the active state (during the reading of memory cells) and in the passive state (in standby). Thanks ...
This paper describes the kinematic error model of Navi-Robot, a novel hybrid parallel/serial robo... more This paper describes the kinematic error model of Navi-Robot, a novel hybrid parallel/serial robotic system, designed to be used for several medical applications. This calibration technique allows modeling the stiffness of the structure taking into account the influence of non-perfect geometry of serial and parallel chains caused by manufacturing errors and mechanical tolerances. The experimentally identified errors have been used to predict, and compensate for, end-point errors as a function of configuration and loads applied, improving the system absolute accuracy. Experimental results show that the adopted methodology is able to effectively correct for the system errors with a significant improvement of robot accuracy. After calibration, the mean/maximum position errors on the end-effector are reduced from 0.743 mm/1.236 mm respectively, to 0.503 mm/0.902 mm.
We present an innovative approach to study the interaction between oblique solitons, using nonlin... more We present an innovative approach to study the interaction between oblique solitons, using nonlinear transmission lines, based on Cellular Neural Network (CNN) paradigm. A single transmission line consists of a 1D array of cells that interact with neighboring cells, through both linear and nonlinear connections. Each cell is controlled by a nonlinear Ordinary Differential Equation, in particular the Korteweg de Vries equation, which defines the cell status and behavior. Two typologies of CNN transmission lines are modelled: crisscross and ring lines. In order to solve KdV equations two different methods are used: 4th-order Runge-Kutta and Forward Euler methods. This is done to evaluate their accuracy and stability with the purpose of implementing CNN transmission lines on embedded systems such as FPGA and microcontrollers. Simulation/analysis Graphic User Interface platforms are designed to conduct numerical simulations and to display elaboration results. From this analysis it is po...
In this paper we present experimental evidence for single-electron phenomena in solid-state memor... more In this paper we present experimental evidence for single-electron phenomena in solid-state memories based on silicon nanocrystals as storage elements. The stepwise evolution of the channel current of a written memory cell biased in the subthreshold regime is monitored by means of a purposely designed low noise acquisition system with a bandwidth of 1 kHz. Each channel current step-up is ascribed to a single-electron emission from the silicon nanocrystal to the silicon substrate and each current step-down is ascribed to a single-electron capture from the silicon substrate into the silicon nanocrystal. The effect of the measurement system bandwidth on the detection of single-electron events is discussed and a procedure for extracting the threshold voltage shift associated to these events is proposed. It is shown that single-electron charging and discharging events in a memory cell with an area of 4.5 x 10(-10) cm2 can cause threshold voltage shift at room-temperature of the order of ...
Technical Digest. Summaries of Papers Presented at the Conference on Lasers and Electro-Optics. Conference Edition. 1998 Technical Digest Series, Vol.6 (IEEE Cat. No.98CH36178), 1998
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