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Efficient algorithms for the calculation of arithmetic spectrum from OBDD and synthesis of OBDD from arithmetic spectrum for incompletely specified Boolean functions

Efficient algorithms for the calculation of arithmetic spect...

引用

ieee International symposium on circuits and systems (ISCAS)

作者： B.J. Falkowski Chip-Hong Chang School of Electrical and Electronic Engineering Nanyang Technological University Singapore

An algorithm has been developed to calculate the arithmetic transform of Boolean functions from their Ordered Binary Decision Diagram (OBDD) representation. The method of decomposition of arithmetic spectral coefficients in terms of the cofactors of Boolean functions that resembles known Shannon decomposition of such functions has been introduced for the first time. Based on the above decomposition, a second new algorithm is presented to synthesize Ordered Binary Decision Diagrams directly from the arithmetic spectrum of Boolean functions.< >

关键词： Arithmetic Boolean functions Data structures Algorithm design and analysis design engineering Process design Equations Joining processes

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An efficient least-squares approach for the design of two-dimensional linear-phase nonrecursive filters

An efficient least-squares approach for the design of two-di...

引用

ieee International symposium on circuits and systems (ISCAS)

作者： S. Sunder R.P. Ramachandran Electrical Engineering Concordia University Montreal QUE Canada Caip Center Rutgers University Piscataway NJ USA

A method is described which can be used to design two-dimensional nonrecursive linear-phase filters. The approach is based on formulating the absolute mean-square error between the amplitude responses of the practical and ideal digital filters as a quadratic function. The coefficients of the filters are obtained by solving a set of linear equations. This method leads to a lower mean-square error and is computationally more efficient than the eigenfilter method. The method is extended to the design of filters with time-domain constraints.< >

关键词： Nonlinear filters Frequency electronic mail Equations Chebyshev approximation design methodology Digital filters Time domain analysis Two dimensional displays Stability

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FPGA-memory tradeoff in the high-level synthesis of FPGA-based reconfigurable systems

FPGA-memory tradeoff in the high-level synthesis of FPGA-bas...

引用

ieee International symposium on circuits and systems (ISCAS)

作者： J.E. Istiyanto S. Monaghan Department of Electronic Systems Engineering University of Essex Colchester UK

The paper presents problems of applying synthesis techniques to FPGA-based design. The target architecture consists of a linear array of FPGAs in which to each FPGA there is a RAM attached to it. An attempt to utilise... 详细信息

关键词： High level synthesis Field programmable gate arrays Hardware Random number generation Read-write memory Cost function Integrated circuit interconnections Multiplexing Polynomials Digital systems

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On establishing the bounds for binary scaled coefficients of fifth and seventh order polyphase half-band filters

On establishing the bounds for binary scaled coefficients of...

引用

ieee International symposium on circuits and systems (ISCAS)

作者： I. Kale N.P. Murphy M.V. Patel School of Electronic and Manufacturing System Engineering University of Westminster London UK

This paper reports on establishing a good starting point for a half-band fixed-point polyphase filter design technique, which employs a natural algorithm, when fifth and seventh order filter structures are used. It should be noted that the convergence of combinatorial algorithms is sensitive to initial conditions implying that the seed filter coefficients and search space for subsequent filters need to be chosen with care for the algorithm to converge efficiently. This requires the definition of a bounded area and bounded volume in the coefficient space for the fifth and seventh order filters respectively. This will ensure that the zeroes are on the unit circle, and hence, will result in maximum null depths being achieved at the zero frequencies (as is the case with the elliptic approximation).< >

关键词： Transfer functions Digital filters Attenuation Algorithm design and analysis Manufacturing systems systems engineering and theory electronic mail Frequency domain analysis Passband Environmental economics

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Q-enhancing technique for high speed active inductors

Q-enhancing technique for high speed active inductors

引用

ieee International symposium on circuits and systems (ISCAS)

作者： R. Kaunisto P. Alinikula K. Stadius Electronic Circuit Design Laboratory Institute of Radio Communications Helsinki University of Technology Espoo Finland Nokia Research Center Helsinki Finland

Integrated active inductor configurations for RF frequencies are examined in this paper. A new aspect of comparing the performance of different topologies is used, and consequent differences between technologies are recognised. On the basis of these studies a new method for raising the Q-factor is presented and its applications considered.< >

关键词： Active inductors Inductance Circuit topology Gallium arsenide Frequency MESFETs Degradation Equivalent circuits Integrated circuit technology Space technology

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A BiCMOS current-feedback operational amplifier with a 60 dB constant bandwidth range

A BiCMOS current-feedback operational amplifier with a 60 dB...

引用

ieee International symposium on circuits and systems (ISCAS)

作者： K. Koli K. Halonen Electronic Circuit Design Laboratory Helsinki University of Technology Espoo Finland

The designed BiCMOS current-feedback operational amplifier utilizes a novel circuit topology which enables constant 1 MHz bandwidth closed loop voltage gains up to 60 dB. The offset current of the current-feedback amplifier is canceled with an active OTA-C feedback loop. The amplifier is fabricated with a 1.2 micron BiCMOS-process (NPN f/sub T/ 7 GHz).< >

关键词： BiCMOS integrated circuits Operational amplifiers Bandwidth Voltage Output feedback Transconductance Frequency Equivalent circuits Capacitance Circuit topology

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Recursive allpass filter design using least-squares techniques

Recursive allpass filter design using least-squares techniqu...

引用

ieee International symposium on circuits and systems (ISCAS)

作者： S. Sunder V. Ramachandran Department of Electrical and Computer Engineering Concordia University Montreal Canada

Three methods for the design of recursive allpass filters are presented. In one of these methods, a least-squares error based on the difference between the desired and actual frequency responses is formulated in a quadratic form. In the other methods, a least-squares error based on the difference between the desired and actual phase responses is formulated in a quadratic form. In all the methods, the coefficients of the allpass filters are obtained by solving a system of linear equations. By appropriately choosing the weighting function we are able to design allpass filters that are optimal in the least-squares sense as well as the minimax sense. Examples are provided to demonstrate the efficacy of the methods.< >

关键词： Equations Nonlinear filters design methodology Transfer functions electronic mail Computer errors Minimax techniques Delay Equalizers Phase distortion

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Optimum highpass filter in linear phase perfect reconstruction QMF bank

Optimum highpass filter in linear phase perfect reconstructi...

引用

ieee International symposium on circuits and systems (ISCAS)

作者： K. Kurosawa I. Yamada N. Yamashita T. Komou Department of Electrical and Electronic Engineering Tokyo Institute of Technology Meguro Tokyo Japan

This paper presents a design method of linear phase PR QMF banks of the second approach. H/sub 1/(z) can be optimized not only in L/sub 2/-norm sense, but also in L/sub /spl infin//-norm sense (essentially, in any sense). Even in L/sub 2/-norm sense, the proposed method is more efficient than the Lagrange multiplier method. The proposed design method can be extended to M(>2)-channel systems immediately. Simulation results are shown for 2- and 3-channel systems, respectively.< >

关键词： Nonlinear filters Finite impulse response filter Channel bank filters design methodology Equations Delay Lagrangian functions Signal synthesis Filter bank Mesons

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A design technique for polyphase decimators with binary constrained coefficients for high resolution A/D converters

A design technique for polyphase decimators with binary cons...

引用

ieee International symposium on circuits and systems (ISCAS)

作者： A. Krukowski I. Kale R.C.S. Morling K. Hejn School of Electron. & Manuf. System Eng. Univ. of Westminster London UK School of Electronic and Manufacturing System Engineering University of Westminster London UK Institute of Electronic Fundamentals Warsaw University of Technology Warsaw Poland

This paper presents a design technique for high fidelity multistage decimation filters based on polyphase and decimator structures, catering for powers of two sample-rate decreases. The technique is well suited for Analog-to-Digital Converter (ADC) applications in excess of 15 bit resolution. The resulting filter coefficients are constrained to the required bit length using a "bit flipping algorithm". This technique is comparatively presented through an example of a cascaded decimation filter, designed for a 20-bit resolution ADC and compared to other approximation methods. The coefficients and frequency responses of the cascaded filter are reported.< >

关键词： Noise generators Noise shaping Noise level Frequency Signal resolution Digital signal processing Baseband IIR filters Multi-stage noise shaping Quantization

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An event controlled reconfigurable multi-chip FFT

An event controlled reconfigurable multi-chip FFT

引用

International symposium on Advanced Research in Asynchronous circuits and systems

作者： S.V. Morton S.S. Appleton M.J. Liebelt High Performance Computer Architecture Team Department of Electrical & Electronic Engineering University of Adelaide Adelaide SA Australia

This paper describes the design of a FFT chip, up to eight of which may be cascaded together to produce continuous streams of transforms of up to 65536 points. The control structure is asynchronous, and hence a fast, very low power, slew-free environment is provided. Aspects of the event controlled methodology used for this, and other designs, is also presented.

关键词： Clocks Algorithm design and analysis Discrete Fourier transforms Signal processing algorithms Fourier transforms Power dissipation Control systems Computer architecture design engineering Power engineering and energy

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