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检索条件"机构=Analog and Mixed-Signal Design Center Department of Electrical and Computer Engineering"

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Error analysis for time-interleaved analog channels

Error analysis for time-interleaved analog channels

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Baiying Yu W.C. Black Agere Systems Allentown PA USA Analog and Mixed-Signal Design Center Department of Electrical and Computer Engineering Iowa State University Ames IA USA

ISBN: (纸本)0780366859

Time-interleaved architectures are frequently employed in high-speed data converters and signal processing channels in order to achieve the highest possible speed. However, the performance of the combined channels is reduced if each channel is not well matched in terms of gain, converter offset and timing skew. In this paper, the errors introduced by gain and offset mismatch and timing skew is analyzed in detail. The digital spectra due to mismatch between channels is derived by applying digital signal processing theories and the closed-forms of signal-to-noise ratio (SNR) are derived and verified using Matlab/sup TM/.

关键词： Error analysis Timing signal to noise ratio Clocks Sampling methods signal processing Performance gain computer languages Equations signal design

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Linear cellular neural networks

Linear cellular neural networks

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： F. Lobato-Lopez J. Silva-Martinez E. Sanchez-Sinencio Mexico Center for Semiconductor Technology (MCST) Motorola Semiconductor Products Sector Department of Electrical Engineering Analog and Mixed Signal Center Texas A and M University College Station TX USA Department of Electrical Engineering Analog and Mixed Signal Center

ISBN: (纸本)0780366859

In this paper we introduce a new way of image processing based on CNN but whose activation function is a linear function. This fact enables us to develop gray-scale image processing; here we introduce the mathematical basis and the electrical model. In addition, some examples are presented and the properties of these networks are discussed.

关键词： Cellular neural networks Image processing Bayesian methods Lattices Low pass filters Gray-scale Mathematical model signal processing computer vision Pattern analysis

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design considerations for band-pass sigma delta modulators

Design considerations for band-pass sigma delta modulators

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： P.K. Singh F. Maloberti Analog & Mixed Signal Center Electrical Engineering Department Texas A and M University College Station TX USA

ISBN: (纸本)0780366859

The transition from the system level to the transistor level design of sigma delta modulator involves degradation in performance due to circuit imperfections, the extent of which depends on the architecture. A systematic understanding of the sensitivity is essential to accomplish a robust design. Smart behavioral modeling allows us to compare architectures and to derive minimum specifications for op-amp and system design.

关键词： Delta-sigma modulation Delta modulation Transfer functions Frequency Poles and zeros Circuits Multi-stage noise shaping Filtering theory Bandwidth Operational amplifiers

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design issues for UHF OTA-C filter realizations

Design issues for UHF OTA-C filter realizations

引用

Southwest Symposium on mixed-signal design (SSMSD)

作者： J. Silva-Martinez Department of Electrical Engineering Analog and Mixed-Signal Center Texas A and M University College Station TX USA

ISBN: (纸本)0780367421

design considerations for ultra-high frequency OTA-C filters are discussed. The effects of the OTA non-idealities on the precision of high-Q filters are accounted for. The parasitic capacitors produce center frequency deviations, and the finite OTA output resistance reduces the Q-factor while the parasitic poles introduce Q-enhancement. In this paper it is shown that the non-dominant pole effects are the most critical ones, hence the use of single-stage OTA's is a must. The effects of the parasitic capacitors on the filter's linearity are considered as well. Simulated results for a 2/sup nd/ order 500 MHz high-Q bandpass filter using a 0.35 /spl mu/m technology are reported.

关键词： Capacitors Band pass filters Frequency Harmonic distortion Transconductance Voltage Electric resistance Q factor Linearity Nonlinear filters

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System design considerations of wideband multi-standard receiver for 3rd generation mobile system applications

System design considerations of wideband multi-standard rece...

引用

Southwest Symposium on mixed-signal design, SSMSD 2000

作者： Sheng, W. Sánchez-Sinencio, E. Analog and Mixed Signal Center Department of Electrical Engineering Texas A and M University College StationTX77843 United States

ISBN: (纸本)0780359755

Mobile communications systems will evolve towards a third generation at the beginning of the new millenium. Third generation is built on the backward compatibility with the second generation networks. Thus wideband multi-standard receivers, which are able to operate according to multiple mobile communication standards, will be required by the third generation system users. This paper presents a number of system issues and design considerations which are involved in the design of wideband multi-standard DCS1800/UMTS digital receiver, and in particular the analog-to-digital converter (ADC) technology requirements for the implementation is presented. © 2000 IEEE.

关键词： Mobile telecommunication systems

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Rank-order filter using multiple-winners-take-all

Rank-order filter using multiple-winners-take-all

引用

43rd Midwest Circuits and Systems Conference (MWSCAS-2000)

作者： Dake, Tuli L.E. Cilingiroglu, Ugur Analog and Mixed Signal Center Electrical Engineering Department Texas A and M University College Station TX 77843 United States

We present an analog VLSI Rank Order Filter (ROF), capable of ranking a wide array of inputs. Implementation is achieved using two multiple-winners-take-all blocks that compute in parallel. Circuit architecture and simulations, show good speed, resolution, area and supply voltage performance. design also offers for a variable rank of filter, which can be programmed at high speeds digitally.

关键词： Electric filters

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CMOS dynamic linking networks for real-time human face tracking

CMOS dynamic linking networks for real-time human face track...

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： R.G. Spencer Analog & Mixed Signal Center and Department of Electrical Engineering Texas A and M University College Station TX USA

Dynamic linking networks are very effective in locating human faces, as they are invariant to changes in position, orientation, scale, deformation, and partial lighting. Additionally, these networks are well suited for analog VLSI using very simple CMOS circuits such as programmable ring oscillators, strongly coupled diffusion lattices, and AC-coupled Hebbian synapses. Dynamic linking networks are orders of magnitude faster than digital computers, thus they provide a fast, efficient, and robust means of tracking faces in real-time. Transistor-level simulation results are presented for the .5 /spl mu/m TSMC CMOS technology with 3-volt supply.

关键词： Joining processes Humans Face CMOS technology Very large scale integration CMOS analog integrated circuits Ring oscillators Coupling circuits Lattices computer networks

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Rank-order filter using multiple-winners-take-all

Rank-order filter using multiple-winners-take-all

引用

Midwest Symposium on Circuits and Systems (MWSCAS)

作者： T.L.E. Dake U. Cilingiroglu Analog & Mixed Signal Center Electrical Engineering Department Texas A and M University College Station TX USA

We present an analog VLSI Rank Order Filter (ROF), capable of ranking a wide array of inputs. Implementation is achieved using two multiple-winners-take-all blocks that compute in parallel. Circuit architecture and simulations show good speed, resolution, area and supply voltage performance. design also offers for a variable rank of filter, which can be programmed at high speeds digitally.

关键词： Nonlinear filters Voltage signal processing computer architecture Circuit simulation Image processing Biomedical signal processing signal design Control systems Capacitors

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System design considerations of wideband multi-standard receiver for 3rd generation mobile system applications

System design considerations of wideband multi-standard rece...

引用

Southwest Symposium on mixed-signal design (SSMSD)

作者： W. Sheng E. Sanchez-Sinencio Analog & Mixed Signal Center Department of Electrical Engineering Texas A and M University College Station TX USA

关键词： Wideband Receivers 3G mobile communication Multiaccess communication Frequency Mobile communication Telecommunication standards GSM signal generators Communication standards

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Matching performance of current mirrors with arbitrary parameter gradients through the active devices

Matching performance of current mirrors with arbitrary param...

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Mao-Feng Lan R. Geiger Analog and Mixed-Signal VLSI Design Center Department of Electrical and Computer Engineering Iowa State University Ames IA USA

Effects of threshold gradients at any angle across a die and through active devices on the matching characteristics of current mirrors are discussed. Results show a major improvement but also an unreported limitation in performance of common-centroid layouts. A CAD tool that predicts performance of arbitrary layouts under arbitrary parameter gradients is introduced.

关键词： Mirrors Threshold voltage Differential amplifiers Predictive models Semiconductor device modeling Very large scale integration mixed analog digital integrated circuits Statistical analysis Linear circuits Geometry

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