The Experts below are selected from a list of 6762 Experts worldwide ranked by ideXlab platform
G.e. Taylor - One of the best experts on this subject based on the ideXlab platform.
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Testing mixed signal ASICs through the use of supply current monitoring
Proceedings ETC 93 Third European Test Conference, 1Co-Authors: K.r. Eckersall, P.l. Wrighton, I.m. Bell, B.r. Bannister, G.e. TaylorAbstract:The authors investigate testing of mixed signal integrated circuits. Several approaches are proposed, most requiring careful partitioning of the Analogue and digital Sections. However, the use of supply current monitoring is applicable to both digital and Analogue Sections. Digital testing has been widely investigated, concentrating on quiescent I/sub ddq/ testing. Using pseudo-random binary test signals with supply current testing, high fault coverage of both catastrophic FET faults and gate oxide shorts in the Analogue Section is shown to be obtainable. Use of on-chip supply sensors has also been investigated. >
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IOLTW - Robust data compression for Analogue test outputs
Proceedings of the Eighth IEEE International On-Line Testing Workshop (IOLTW 2002), 1Co-Authors: A. Rankov, G.e. Taylor, J. WebsterAbstract:Ohletz [1991] described a mixed signal circuit architecture which can be reconfigured to allow built-in-self-test of both Analogue and digital parts. In testing the Analogue Section an on board test signal can be generated from digital components, the Analogue test output fed through an A-D converter and the resulting digital bit stream used as the input to a digital signature analyser. Clearly such a test strategy has a number of advantages, but particular issues arise in using signature analysis in this way due to the tolerance bands associated with Analogue signals. Such tolerances complicate the process of A-D conversion and lead to possible differences in the bit stream between two good devices with the danger of classifying good devices as faulty. The paper describes and evaluates a method for overcoming this problem by illustrating it with a number of circuits.
J. Webster - One of the best experts on this subject based on the ideXlab platform.
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IOLTW - Robust data compression for Analogue test outputs
Proceedings of the Eighth IEEE International On-Line Testing Workshop (IOLTW 2002), 1Co-Authors: A. Rankov, G.e. Taylor, J. WebsterAbstract:Ohletz [1991] described a mixed signal circuit architecture which can be reconfigured to allow built-in-self-test of both Analogue and digital parts. In testing the Analogue Section an on board test signal can be generated from digital components, the Analogue test output fed through an A-D converter and the resulting digital bit stream used as the input to a digital signature analyser. Clearly such a test strategy has a number of advantages, but particular issues arise in using signature analysis in this way due to the tolerance bands associated with Analogue signals. Such tolerances complicate the process of A-D conversion and lead to possible differences in the bit stream between two good devices with the danger of classifying good devices as faulty. The paper describes and evaluates a method for overcoming this problem by illustrating it with a number of circuits.
H. Afarideh - One of the best experts on this subject based on the ideXlab platform.
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Application of Computers in Experiments Design, Building and Evaluation of a New Generation of Multichannel Analyzers Implemented in Xilinx ZYNQ-7020
Instruments and Experimental Techniques, 2019Co-Authors: V. Esmaeili Sani, M. Mohamadian, I. Alizadeh, H. AfaridehAbstract:Recently, SoCs (System on a Chip) are the serious competitors and even more efficient systems than CPUs and other data processing systems based on FPGA and computer. Also, the Multi-Channel Analyzer (MCA) is one of the main components of the nuclear electronics system that determines many of the radiation measurement parameters. A prototype of the proposed new generation of MCA systems, based on SoCs, is presented which is very small, compact, and at the same time, has the full functionality of a data acquisition board. It also has many features for analyzing output data and making changes to the overall system structure through software. The designed board uses ZYNQ to provide substrate and main infrastructure to add more peripherals for any specific application. The proposed system is in fact a multi-purpose system that can simultaneously provide the functionalities of an oscilloscope, computer-independent spectrum demonstration, and even any desired application for inaccessible radiation fields thanks to its low cost, lightness and compact size. In addition, the designed Analogue Section in this system, besides the digital Section, facilitates making the system more compact and flexible in order to fully customize, match and remove some conversional Analogue parts.
Laurent Denis - One of the best experts on this subject based on the ideXlab platform.
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High dynamic range, Interferences Tolerant, Digital Receivers for Radioastronomy: Results and Projects at Paris and Nanay Observatory
Symposium - International Astronomical Union, 2002Co-Authors: Carlo Rosolen, Alain Lecacheux, E. Gerard, Vincent Clerc, Laurent DenisAbstract:Radio astronomy in the decameter to centimeter wavelength range is facing new challenges because of man made interferences due to increasing needs in telecommunications. At the Radioastronomy department of Paris Meudon Observatory, we have been working since four years on high dynamic range digital receivers based on Digital Signal Processors (DSP). The first achievement is a digital spectro- polarimeter devoted to spectroscopy of astrophysical radiation in decameter range, now in operation at the Nancay Decameter array. The block diagram of the receiver includes a high dynamic range Analogue Section followed by a 12 bits Analogue to digital converter. The digital part makes use of high power, programmable digital circuits for signal processing, arranged in a dedicated parallel architecture, able to compute in real time the power spectrum and the correlation of the input signals. This receiver was also used, as spectrometer backend, at Nancay decimetric radiotelescope and has performed very well in the presence of very strong interferences. We are presently working on a new digital receiver with broader bandwidth. The objective is 2 × 25 MHz band with at least 60 dB dynamic range. This new receiver will use additional computation power in order to recognise and avoid man made interferences which corrupt the radio astronomical signal. At the Nancay Radioastronomy Observatory, we have started to develop a new digital configurable receiver with 8 times 25 MHz band and ten thousand channels. For low frequency radioastronomy, direct spectrum computation technique is really powerful and offers new capabilities for real time interferences excision. Fig. 1 shows pulsar observations in the presence of interference made with the DSP receiver on the UTR-2 radiotelescope. Fig. 2 shows the effect of satellite interfernce on OH observations made with the Nancay telescope. Fig. 3 shows the block diagram of the DSP system and demonstrates how offline excision of interference in the frequency time-domain enables recovery of the signal. The final spectrum had 960 minutes integration on and off source and took 8045 minutes of procession on a 450 MHz Pentium II.
M. Maddiotto - One of the best experts on this subject based on the ideXlab platform.
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Design and realisation of digital radio transceiver using software radio architecture
VTC2000-Spring. 2000 IEEE 51st Vehicular Technology Conference Proceedings (Cat. No.00CH37026), 1Co-Authors: A.m. Bada, M. MaddiottoAbstract:An extremely flexible hardware architecture of a base transceiver station (BTS) using software radio (SWR) technologies has been studied and an experimental prototype has been implemented in our R&D labs. It has been developed for the GSM system, has a bandwidth of 10 MHz and is able to provide up to sixteen carriers. The very flexible wideband solution allows a drastic reduction of the Analogue circuitry in the system because it does not need any antenna branching, tuning filters, synthesiser on the local oscillator, implying lower costs, sizes, complexity, while reliability and repeatability are increased, than in a narrowband solution. Thanks to the reprogrammability of the parameters, the wideband approach and the remarkable reduction of the Analogue Section, the SWR architecture is well suited for the design of present and future generations of cellular mobile radio systems. In addition, the SWR technique is especially appropriate to be used together with an array antenna for the realisation of digital adaptive beamforming (smart antennas).
