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Low power discriminators with input offsets correction for fast multichannel recording ASIC

Low power discriminators with input offsets correction for f...

引用

International Conference on Mixed Design of Integrated Circuits and Systems, MIXDES 2006

作者： Gryboś, P. Idzik, M. Maj, P. Świentek, K. AGH University of Science and Technology Poland Faculty of Physics and Applied Computer Science AGH UST Al. Mickiewicza 30 30-059 Krakow Poland Faculty of Electrical Engineering Automatics Computer Science and Electronics AGH UST Al. Mickiewicza 30 30-059 Krakow Poland

ISBN: (纸本)8392263219

A multichannel ASIC for digital X-ray imaging requires one or more discriminators in each recording channel. The critical parameters of these discriminators are low power consumption and low offset spreads from channel to channel. In the readout electronics dedicated to work with high rates of input pulses the charge sensitive amplifier, filter stages and discriminators are often DC coupled. Such approach generates additional channel to channel spread of DC level at discriminators inputs. In this paper we present the structure of discriminators pair, which allows to select pulses according to their amplitudes and can work effectively in multichannel fast readout ASIC due to additional correction circuits implemented in each channel. We present the architecture of the discriminators, the results of Monte Carlo simulations of input offsets spreads and the measurement results of such structures which were implemented in 64-channel ASIC fabricated in 0.35 μm CMOS technology. Copyright © 2006 by Department of Microelectronics & computer Science, Technical University of Lodz.

关键词： Application specific integrated circuits

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Electromagnetic Influence between Electro-Energetic Group Components

Electromagnetic Influence between Electro-Energetic Group Co...

引用

EMC Europe 2006 Barcelona, International Symposium on Electromagnetic Compatibility

作者： P. M. Nicolae I. D. Nicolae Department of Electrical Engineering Faculty of Electrotechnics University of Craiova Department of Software Engineering Faculty of Automatics Computer Science and Electronics University of Craiova

ISBN: (纸本)8468994383

At large energetic groups, interference problems can appear between different components, mainly due to the inductive and resistive couplings. An original analysis algorithm that uses Fast Fourier Transform (EFT) is used. Two data acquisition systems were employed to record the electric nature signals from various points of the studied energetic group. The quality factors were computed and presented, along with the powers flow between the auxiliary generator and the fully-controlled rectifier with thyristors and respectively between the main generator and the power system. There are estimated the electromagnetic interdependencies as a consequence of some influences between different components of the group. Implications of these influences over other zones (monitoring and protection systems) from the energetic group are also presented. Conclusions are drawn with respect to the electromagnetic biocompatibility in what is concerning the noise due to the electromagnetic interference.

关键词： Harmonic analysis Generators Power harmonic filters Rectifiers Electromagnetics Stator windings Voltage Shafts Recording Protection

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DEDIX - Development of fully integrated multichannel ASIC for high count rate digital x-ray imaging systems

DEDIX - Development of fully integrated multichannel ASIC fo...

引用

2006 IEEE Nuclear Science Symposium, Medical Imaging Conference and 15th International Workshop on Room-Temperature Semiconductor X- and Gamma-Ray Detectors, Special Focus Workshops, NSS/MIC/RTSD

作者： Grybos, P. Maj, P. Szczygiel, R. Ramello, L. Idzik, M. Swientek, K. Stobiecki, T. Faculty of Electrical Engineering Automatics Computer Science and Electronics Department of Measurement and Instrumentation AGH University of Science and Technology Al. Mickiewicza 30 30-059 Cracow Poland Dip. Scienze e Tecnologie Avanzate Universita del Piemonte Orientale INFN Alessandria Italy Faculty of Physics and Applied Computer Science AGH University of Science and Technology Al. Mickiewicza 30 30-059 Cracow Poland Faculty of Electrical Engineering Automatics Computer Science and Electronics Department of Electronics AGH University of Science and Technology Al. Mickiewicza 30 30-059 Cracow Poland

ISBN: (纸本)1424405610

We present the development of a 64 channel readout ASIC called DEDIX for high count rate position-sensitive measurements using semiconductor detectors. The ASIC is designed in 0.35 μm CMOS process and its total area is 3400×5000 μm2. The DEDIX has a binary readout architecture. Each channel is built of a charge sensitive amplifier (CSA) with a pole-zero cancellation circuit, a shaper, two independent discriminators and two independent 20-bit counters. The size of the input device in CSA has been optimized for a detector capacitance in the range of 1-3 pF per strip. An equivalent noise charge of 110 el rms has been achieved for a total detector capacitance of 1 pF at the shaper peaking time of 160 ns. Internal correction DAC implemented in each channel independently ensures the low spread of effective threshold of discriminators at 0.4 mV on one sigma level. The mean gain in the multichannel ASIC is 54 μV/el, with a good uniformity from channel to channel (sd/mean = 0.8%). Low noise performance and high rate capability have been demonstrated by the measurement up to and above 1 MHz of average rate of input signals. © 2006 IEEE.

关键词： Imaging systems

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Design, functionality and testability of a multi-channel ASIC for digital X-ray imaging

Design, functionality and testability of a multi-channel ASI...

引用

International Conference on Mixed Design of Integrated Circuits and Systems, MIXDES 2006

作者： Gryboś, P. Idzik, M. Maj, P. Świentek, K. AGH University of Science and Technology Poland Faculty of Physics and Applied Computer Science AGH University of Science and Technology Al Mickiewicza 30 30-059 Kraków Poland Faculty of Electrical Engineering Automatics Computer Science and Electronics AGH University of Science and Technology Al Mickiewicza 30 30-059 Kraków Poland

ISBN: (纸本)8392263219

This paper presents the design and results of first measurements of a fast binary readout architecture ASIC aimed for digital X-ray imaging. The ASIC called DEDIX includes 64 readout channels, a number of DACs for different bias and threshold settings, voltage reference, temperature sensor circuit, calibration circuit, I/O circuit and a control logic circuit. Each readout channel consists of charge amplifier, PZC circuit, shaper, two discriminators and two 20-bit counters. The DEDIX is supposed to work in a relatively complex systems featuring several hundred detector channels. For this reason particular attention was paid to general system solutions and the circuit testability. This paper is essentially dedicated to these aspects of DEDIX operation. The circuit was implemented in a 3.3 V 0.35 μm CMOS technology. First tests confirm full functionality of the ASIC. Copyright © 2006 by Department of Microelectronics & computer Science, Technical University of Lodz.

关键词： Application specific integrated circuits

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Pole-Zero Cancellation Circuit for Charge Sensitive Amplifier with Pile-up Pulses Tracking System

Pole-Zero Cancellation Circuit for Charge Sensitive Amplifie...

引用

IEEE Symposium on Nuclear Science (NSS/MIC)

作者： P. Grybos Faculty of Electrical Engineering Automatics Computer Science and Electronics Department of Measurement and Instrumentation AGH University of Science and Technology Poland

The pole-zero cancellation circuit with pile-up pulses tracking system is discussed. The CSA uses a MOS transistor biased in a triode region to continuous discharge the integration capacitance. The low noise requirements of the front-end electronics place the feedback CSA resistance in hundreds of the MOmega range. However, the high rate of input pulses generates a DC voltage shift at the CSA output and this influences the active feedback circuit. We propose a novel circuit to bias transistors in the feedback of the CSA and in the PZC circuit which tracks the mentioned above voltage shift at the CSA output and ensures the proper cancellation of the CSA feedback pole. We present measurements of a test structure for the continuous CSA feedback discharge and the implementation of this circuit in a fast multichannel ASIC fabricated in the 0.35 mum CMOS technology.

关键词： Pulse amplifiers Pulse circuits Feedback circuits Voltage Output feedback Circuit testing CMOS technology MOSFETs Capacitance Circuit noise

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Low Power Discriminators With Input Offsets Correction For Fast Multichannel Recording ASIC

Low Power Discriminators With Input Offsets Correction For F...

引用

International Conference on Mixed Design of Integrated Circuits and Systems (MIXDES)

作者： P. Grybo M. Idzik P. Maj K. Swientek Faculty of Physics and Applied Computer Science AGH University of Science and Technology Kraków Poland Faculty of Electrical Engineering Automatics Computer Science and Electronics Kraków Poland

Multichannel ASIC for digital X-ray imaging requires one or more discriminators in each recording channel. The critical parameters of these discriminators are low power consumption and low offset spreads from channel to channel. In the readout electronics dedicated to work with high rates of input pulses the charge sensitive amplifier, filter stages and discriminators are often DC coupled. Such approach generates additional channel to channel spread of DC level at discriminators inputs. In this paper we present the structure of discriminators pair, which allows to select pulses according to their amplitudes and can work effectively in multichannel fast readout ASIC due to additional correction circuits implemented in each channel. We present the architecture of the discriminators, the results of Monte Carlo simulations of input offsets spreads and the measurement results of such structures which were implemented in 64-channel ASIC fabricated in 0.35 mum CMOS technology

关键词： Disk recording Application specific integrated circuits Pulse amplifiers CMOS technology X-ray imaging Digital recording Energy consumption Readout electronics Filters Coupling circuits

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Integrated Charge Sensitive Amplifier with Pole-Zero Cancellation Circuit for High Rates

Integrated Charge Sensitive Amplifier with Pole-Zero Cancell...

引用

Proceedings of 2006 IEEE International Symposium on Circuits and Systems,Volume 4

作者： Pawel Grybos Marek Idzik Krzysztof Swientek Piotr Maj Faculty of Physics and Applied Computer Science AGH University of Science and Technology Cracow Poland Faculty of Electrical Engineering Automatics Computer Science and Electronics AGH University of Science and Technology Cracow Poland

We report on design and preliminary measurements of integrated charge sensitive amplifier dedicated to work with asynchronous high rate input signals. In this paper we discuss the trade-off between high rate operation of CSA and its noise, taking into account the negative effects of pile-up pulses in readout electronics. The key element in the presented fast CSA is a pole-zero cancellation circuit The architecture of the PZC circuit implemented in 0.35 μm CMOS technology is discussed in detailed. The first tests of high rate operation of CSA with PZC circuit up to 2 MHz of input signals are reported.

关键词： Pulse amplifiers Capacitive sensors Voltage CMOS technology Feedback circuits Integrated circuit technology Noise generators Pulse generation Readout electronics Pulse shaping methods

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Implementation of 4-channel image transmultiplexer in FPGA

Implementation of 4-channel image transmultiplexer in FPGA

引用

International Conference on Signals and Electronic Systems, ICSES'06

作者： Sypka, Przemyslaw Rajda, Pawel J. Sudól, Martin Department of Electronics AGH University of Science and Technology al. Mickiewicza 30 30-059 Kraków Poland Faculty of Electrical Engineering Automatics Computer Science and Electronics AGH University of Science and Technology al. Mickiewicza 30 30-059 Kraków Poland

A transmultiplexer combines several images into one image to be sent through a single communication channel is presented. The paper presents the implementation of such system in Field Programmable Gate Arrays. The pro... 详细信息

ISBN: (纸本)8392117263

关键词： Field programmable gate arrays (FPGA)

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Pulse Radiation by Acoustic Rototron

Pulse Radiation by Acoustic Rototron

引用

International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)

作者： Olexa Piddubniak Nadia Piddubniak Faculty of Process and Environmental Engineering Technical University of Lodz Lodz Poland Institute of Computer Technology Automatics and Metrology National University 'Lviv Polytechnica' Lviv Ukraine

The sound pulse radiation from a rotating elastic circular cylinder immersed in water (acoustic rototron) is studied. The transition and resonance characteristics of acoustic signals for the cases of radiator made fro... 详细信息

关键词： Acoustic pulses Angular velocity Engine cylinders Fourier transforms Resonance Acoustic materials Frequency Acoustical engineering Metrology Stress

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Transition and Resonance Processes in the Material of an Acoustic Rototron

Transition and Resonance Processes in the Material of an Aco...

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International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)

作者： Olexa Piddubniak Nadia Piddubniak Institute of Computer Technology Automatics and Metrology National University 'Lviv Polytechnica' Lviv Ukraine Faculty of Process and Environmental Engineering Technical University of Lodz Lodz Poland

The pulse stress-strain state of an elastic circular cylinder of infinite length rotating about its axis (acoustic rototron) in water is investigated. The transition and resonance characteristics of acoustic rototrons... 详细信息

关键词： Resonance Acoustic materials Engine cylinders Angular velocity Acoustic pulses Fourier transforms Stress Acoustical engineering Metrology Spectral analysis

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