@MASTERSTHESIS{markus:ms99,
AUTHOR = {J\'{a}nos M\'{a}rkus},
TITLE = {Signal-Model Based Synthesis of the Sound of Organ Pipes},
SCHOOL = {Budapest University of Technology and Economics,
Department of Measurement and Information Systems},
YEAR = 1999,
ADDRESS = {Magyar tud\'{o}sok k{\"{o}}r\'{u}tja 2.
H-1117 Budapest, Hungary},
MONTH = MAY,
NOTE = {120 p, in Hungarian},
ABSTRACT = {This master thesis introduces the possibility of
the \emph{signal model based synthesis of the sound of organ
pipes}. First the limits of a classical organ are introduced
(non-portability, maintenance cost), and according to these
limits, the requirements of a modell-organ are discussed
(portability, economical reproduction and high-quality sound). For
the objective qualification of the existing methods and the signal
model based one, the basic psychoacoustical parameters are
discussed. These are the stationary spectrum (pitch, timbre), the
transients (attack, decay), the quasi-steady properties
(modulations, noise) and the external effects (reverberation,
localisation). The properties of the hearing that can simplify a
synthesis, are also discussed (phase-insensitivity, masking
effects). The paper discusses henceforth the psychoacoustical
parameters of the organ pipes using introduced physical
properties. The analysis is based on original pipe-records. Next,
the known synthesis methods are examined, including the
Hammond-organ, the organs with analog circuits, the sampling
method and the physical modeling. All of their advantages and
disadvantages are discussed. After a short summarizing of the
existing methods, the paper introduces the signal model based
synthesis. The synthesis applies a periodic signal model that
takes into account the basic psychoacoustical parameters mentioned
above, and is based on the Fourier-expansion of the periodic
signals. Implementing the parameters of a musical instrument, the
conceptual signal generator is completed with filters and also
a noise-generator. The parameters of the model were derivated
off-line from original pipe-records by means of signal processing
tools. The result of the method is convincing both for laymen
and for musicians. Theoretically the introduced signal-model
structure and the developed analysis method are also able to
model other instruments that has no strong non-linear
properties.},
KEYWORDS = {organ, pipe, sound, synthesis},
PDF = {pubs/diploma1999.pdf},
HTTP = {http://www.mit.bme.hu/projects/organ98/index.html}
}
@PHDTHESIS{markus:phd05,
AUTHOR = {J\'{a}nos M\'{a}rkus},
TITLE = {Higher-order Incremental Delta-Sigma Analog-to-Digital Converters},
SCHOOL = {Budapest University of Technology and Economics,
Department of Measurement and Information Systems},
YEAR = 2005,
ADDRESS = {Magyar tud\'{o}sok k{\"{o}}r\'{u}tja 2.
H-1117 Budapest, Hungary},
MONTH = MAR,
NOTE = {132 p},
ABSTRACT = {High-precision analog-to-digital conversion of high dynamic range,
low-frequency signals is required in several applications of
measurement and data acquisition. One solution to the problem is
the incremental (or charge-balancing) delta-sigma converter, which
represents a hybrid between the dual-slope converter and the
first-order delta-sigma one. This dissertation extends the operation of
the first-order incremental converter to higher-order delta-sigma loops.
It discusses the basic operation of such structures, the
achievable resolution, digital filter design methods, and their
sensitivity to various imperfections. The thesis also compares the
results with those found in the literature. The theoretical
results are verified by simulations and by measurements made on an
integrated circuit.},
KEYWORDS = {incremental delta-sigma, analog-to-digital converter, no-latency,
one-shot delta-sigma, DC measurement, decimation, sinc filter},
PDF = {pubs/markus_phd.pdf},
HTTP = {http://www.mit.bme.hu/projects/delsig01/index.html}
}
@MANUAL{temes:patent04,
AUTHOR = {G\'{a}bor C. Temes and Jos\'{e} Silva and J\'{a}nos M\'{a}rkus},
TITLE = {Switched Capacitor Signal Scaling Circuit},
ORGANIZATION = {Assignee: Microchip Technology Inc.},
YEAR = 2004,
MONTH = MAR,
NOTE = {{US} patent application, filed on March 23, 2004},
ABSTRACT = {A signal scaling circuit for accurately reducing
the effective amplitude of an input signal by a rational factor
N/M, where N and M are integers and N < M, is disclosed. An
input, reference, bias and output node as well as control
circuitry are selectively coupled to M switched capacitor circuits
such that N/M scaling may be achieved. Cooperation between the M
switched capacitor circuits and the control circuitry divides the
M switched capacitors circuits into subsets of N and M - N
switched capacitors, respectively. Each subset is then
selectively coupled to an input, reference and/or bias signal to
produce an output signal having as one of its components an N/M
portion of the input signal. Error reduction in the scaled signal
is achieved by shuffling the switched capacitor circuits
populating each subset after selected time intervals.},
KEYWORDS = {delta-sigma, signal scaling, switched capacitor, shuffling}
}
@ARTICLE{markus:meas02,
AUTHOR = {J\'{a}nos M\'{a}rkus and Istv\'{a}n Koll\'{a}r},
TITLE = {Standard Environment for the Sine Wave Test of {ADC}'s},
JOURNAL = {Special Issue on {ADC} Modeling and Testing of the Measurement Journal},
YEAR = 2002,
VOLUME = 31,
NUMBER = 4,
PAGES = {261--69},
MONTH = JUN,
ABSTRACT = {ADC data sheets and test methods are not yet
standardized. A new attempt to create a common platform for these
is the draft standard IEEE-STD-1241. However, the methods
described in this standard need extra effort from the user to
exactly understand and implement them. It is therefore very
reasonable to provide programs which implement these methods, and
allow manufacturers and users to use them. This ensures that the
same characterizing quantities will be used for the same purpose
by everyone. The first attempt for this was a LabView program
announced in 1999. In this paper –– after general considerations
–– another implementation is presented, running under MATLAB. This
will hopefully extend the number of the users of the methods
described in the standard.},
KEYWORDS = {IEEE-STD-1241; ADC testing; Sine wave method; MATLAB; EUPAS },
PDF = {pubs/meas2002.pdf},
PS = {pubs/meas2002.ps.gz},
IF = {0,486}
}
@ARTICLE{bilau:csai04,
AUTHOR = {Tam\'{a}s Zolt\'{a}n Bilau and Tam\'{a}s Megyeri and
Attila S\'{a}rhegyi and J\'{a}nos M\'{a}rkus and Istv\'{a}n Koll\'{a}r},
TITLE = {Four-Parameter Fitting of Sine Wave Testing Results: Iteration and Convergence},
JOURNAL = {Computer Standards and Interfaces},
YEAR = 2004,
VOLUME = 26,
NUMBER = 1,
PAGES = {51--56},
MONTH = JAN,
NOTE = {},
ABSTRACT = {Small improvements to the iteration procedure of
the IEEE Standard 1241-2001 are suggested, and extension of the
standard MATLAB program implementing the sine wave test is
discussed. The program is compatible with the LabView program
already announced, and in other working modes offers extensions,
too.},
KEYWORDS = {IEEE-STD-1241, ADC testing, sine wave
method, MATLAB, four-parameter method},
PDF = {pubs/csai2004.pdf},
IF = {0,362}
}
@ARTICLE{markus:tcas04a,
AUTHOR = {J\'{a}nos M\'{a}rkus and Gabor C. Temes},
TITLE = {An Efficient Delta-Sigma {ADC} Architecture for Low Oversampling Ratios},
JOURNAL = {IEEE Transactions on Circuits and Systems I. -- Special
Issue on Advances on Analog-to-Digital and Digital-to-Analog Converters},
YEAR = 2004,
VOLUME = 51,
NUMBER = 1,
PAGES = {63--71},
MONTH = JAN,
OPTNOTE = {},
ABSTRACT = {As the demand for DS (Delta-Sigma)
analog-to-digital converters (ADCs) with higher bandwidth and
higher signal-to-noise ratio (SNR) increases, designers have to
look for efficient structures with low oversampling ratio (OSR).
The Leslie-Singh or M–0 MASH architecture is often used in such
applications. Based on this architecture, a reduced-sample-rate
structure was introduced, which needs less chip area and power,
but increases the noise floor. This paper describes a modification
of the reduced-sample-rate structure which realizes an optimized
transfer function, and avoids an SNR loss. In fact, it increases
the SNR for high-order modulators. The method can also be applied
to one-stage modulators. Simulation results for different MASH
ADCs and sensitivity analysis verify the usefulness of the
proposed technique.},
KEYWORDS = {Leslie–Singh, MASH, modified (rotated) sinc-filter,
multistage delta-sigma modulator, optimized noise transfer
function, reduced-sample-rate.},
PDF = {pubs/tcas2004a.pdf},
IF = {0,956}
}
@ARTICLE{markus:tcas04b,
AUTHOR = {J\'{a}nos M\'{a}rkus and Jos\'{e} Silva and Gabor C. Temes},
TITLE = {Theory and Applications of Incremental Delta-Sigma Converters},
JOURNAL = {IEEE Transactions on Circuits and Systems---I: Regular Papers},
YEAR = 2004,
VOLUME = 51,
NUMBER = 4,
PAGES = {678--690},
MONTH = APR,
NOTE = {},
ABSTRACT = {A/D converters used in instrumentation and
measurements often require high absolute accuracy, including very
high linearity and negligible DC offset. The realization of
high-resolution Nyquist-rate converters becomes very expensive
when the resolution exceeds 16 bits. The conventional Delta-Sigma
structures used in telecommunication and audio applications
usually cannot satisfy the requirements of high absolute accuracy
and very small offset. The incremental (or integrating) converter
provides a solution for such measurement applications, as it has
most advantages of the Delta-Sigma converter, yet is capable of
offset-free and accurate conversion. In this paper, theoretical
and practical aspects of higher-order incremental converters are
discussed. The operating principles, topologies, specialized
digital filter design methods and circuit level issues are all
addressed. It is shown how speed, resolution and analog/digital
complexity can be optimized for a given design, and how with some
special digital filters improved speed/resolution ratio can be
achieved. The theoretical results are verified by showing design
examples and simulation results. },
KEYWORDS = {Decimating filter, Delta-Sigma modulator, dither,
incremental (integrating) analog-digital (A/D) converter,
one-shot, no-latency, charge-balancing Delta-Sigma converter,
staggered zeros, switched-capacitor circuits},
PDF = {pubs/tcas2004b.pdf},
IF = {0,956}
}
@ARTICLE{bank:perpol04,
AUTHOR = {Bal\'{a}zs Bank and J\'{a}nos M\'{a}rkus and Attila Nagy
and L\'{a}szl\'{o} Sujbert},
TITLE = {Signal- and Physics-Based Sound Synthesis of Musical Instruments},
JOURNAL = {Periodica Polytechnica, Ser. Electrical Engineering},
YEAR = 2004,
VOLUME = 47,
NUMBER = {3--4},
PAGES = {269--295},
MONTH = {},
NOTE = {},
ABSTRACT = {In this paper signal-based and physics-based sound
synthesis methods are described, with a particular emphasis on our
own results achieved in the recent years. The applications of
these methods are given for the case of organ, piano, and violin
synthesis. The two techniques are compared based on these case
studies, showing that in some cases the physics-based, in other
cases the signal-based realization is more advantageous. As a
theoretical result, we show that the two methods can be equivalent
under special circumstances.},
KEYWORDS = {digital signal processing, sound synthesis,
musical acoustics, signal modeling, physical modeling, organ,
piano, violin}
}
@ARTICLE{markus:tim05,
AUTHOR = {J\'{a}nos M\'{a}rkus and Istv\'{a}n Koll\'{a}r},
TITLE = {On the Monotonicity and Linearity of Ideal Radix-based {A/D} Converters},
JOURNAL = {IEEE Transactions on Instrumentation and Measurement},
YEAR = 2005,
VOLUME = 54,
NUMBER = 6,
PAGES = {2545--2457},
MONTH = DEC,
ABSTRACT = {Both cyclic and pipelined analog-to-digital (A/D) converters
are getting more and more popular, as they are relatively
easy to design and either have a high throughput (pipelined converters)
or small area- and power-consumption (cyclic/algorithmic
converters). To avoid saturation and to ensure effective digital calibration,
in the analog stage(s) of these converters, instead of the
ideal two, often a smaller nominal gain (called radix number) is
used. In this paper, it is shown that these radix-based converters
have nonmonotonic output and finite linearity. The causes of these
phenomena are discussed in detail. Fully digital method is suggested
to remove nonmonotonic code transitions and estimation on
the maximum differential nonlinearity of the ideal converter as a
function of the number of cycles is presented.},
KEYWORDS = {Algorithmic, analog-digital (A/D) conversion,
cyclic, differential nonlinearity, DNL, linearity, monotonicity,
multistage pipelined, nonradix-2, radix less than 2, subradix ADC,
subranging A/D converter.},
IF = {0,592},
PDF = {pubs/tim2005.pdf}
}
@ARTICLE{quiquempoix:jssc06,
AUTHOR = {Vincent Quiquempoix and Philippe Deval and Alexandre Barreto
and Gabriele Bellini and J\'{a}nos M\'{a}rkus and Jos\'{e} Silva and
Gabor C.~Temes},
TITLE = {A Low-Power 22-Bit Incremental {ADC}},
JOURNAL = {IEEE Journal of Solid-State Circuits},
YEAR = 2006,
VOLUME = 41,
NUMBER = 7,
PAGES = {1562--71},
MONTH = JUL,
ABSTRACT = {This paper describes a low-power 22-bit incremental
ADC, including an on-chip digital filter and a low-noise/low-drift
oscillator, realized in a 0.6-um CMOS process. It
incorporates a novel offset-cancellation scheme based on fractal
sequences, a novel high-accuracy gain control circuit, and a novel
reduced-complexity realization for the on-chip sinc filter. The
measured output noise was 0.25 ppm (2.5 uVRMS), the dc offset
2 uV, the gain error 2 ppm, and the INL 4 ppm. The chip operates
with a single 2.7 – 5 V supply, and draws only 120 uA current
during conversion.},
KEYWORDS = {Analog-to-digital conversion, CMOS analog integrated
circuits, delta-sigma modulation, incremental data converters,
low-power electronics, mixed analog-digital integrated
circuits, oversampling A/D converters, switched-capacitor circuits.},
IF = {}
}
@INPROCEEDINGS{markus:bekesy99,
AUTHOR = {J\'{a}nos M\'{a}rkus and L\'{a}szl\'{o} Sujbert},
TITLE = {Signal Model Based Synthesis of the Sound of Organ Pipes},
BOOKTITLE = {Proceedings of the International Békésy Centenary
Conference on Hearing and Related Sciences},
YEAR = 1999,
PAGES = {194--199},
OPTEDITOR = {},
OPTPUBLISHER = {},
OPTORGANIZATION = {},
ADDRESS = {Budapest, Hungary},
MONTH = {24--26~} # JUN,
OPTISBN = {963 408 152 5},
ABSTRACT = {The paper describes a special digital
time-domain additive synthesis technique of the sound of
organ pipes. The synthesis applies a periodic signal model that
takes into account the basic psychoacoustical parameters of a
musical sound: the stationary spectrum, the attack and decay
transients, the quasi-steady properties and the external effects.
The model is based on the Fourier-expansion of the periodic
signals, which is completed with filters and noise-generator
implementing the parameters above. The parameters of the model
were derivated off-line from original pipe-records by means of
signal processing tools. The result of the method is convincing
both for laymen and for musicians. Theoretically the
introduced signal-model structure and the developed analysis
method are also able to model other instruments that has no
strong non-linear properties.},
KEYWORDS = {organ flue pipe, sound synthesis, periodic model},
PDF = {pubs/bekesy99.pdf},
PS = {pubs/bekesy99.ps.gz}
}
@INPROCEEDINGS{markus:ms00,
AUTHOR = {J\'{a}nos M\'{a}rkus},
TITLE = {Sine Wave Test of Analog to Digital Converters},
BOOKTITLE = {Proceedings of the 7th PhD Mini-Symposium},
YEAR = 2000,
PAGES = {24--25},
ORGANIZATION = {Budapest University of Technology and Economics, Department of Measurement
and Information Systems },
ADDRESS = {Budapest, Hungary},
MONTH = {27--28~} # JAN,
PDF = {pubs/ms2000.pdf},
PS = {pubs/ms2000.ps.gz}
}
@INPROCEEDINGS{markus:tv2000,
AUTHOR = {J\'{a}nos M\'{a}rkus},
TITLE = {Signal Model Based Synthesis of the Sound of Organ Pipes},
BOOKTITLE = {Proceedings of the 9th Conference and Exhibition on Television and Audio Technologies
(TV 2000 Conference)},
YEAR = 2000,
PAGES = {151--57},
ADDRESS = {Thermal Hotel Helia, Budapest, Hungary},
MONTH = {23--25~} # MAY,
NOTE = {abstract in English and Hungarian},
ABSTRACT = {The paper describes a digital time-domain additive synthesis
technique and its application to the synthesis of the sound of
organ pipes. The model is based on the Fourier-expansion of the
periodic signals. This periodic signal generator is completed with
filters and noise-generator implementing the instrument-specific
parameters. The novelty of the proposed method is that it utilizes
independent IIR filters for each harmonics, which filters are
responsible for the transient behavior of the sound. The result is
convincing both for laymen and for musicians. For listening to it,
there are some original and synthesized sample available at
http://www.mit.bme.hu/\~{ }markus/organ. Additional advantage of
the introduced signal-model structure is that it is able to model
other instruments that has no strong non-linear properties.},
KEYWORDS = {organ flue pipe, sound synthesis, periodic model},
PDF = {pubs/tv2000.pdf},
PS = {pubs/tv2000.ps.gz}
}
@INPROCEEDINGS{kollar:ewadc00,
AUTHOR = {Istv\'{a}n Koll\'{a}r and J\'{a}nos M\'{a}rkus},
TITLE = {Sine wave test of {ADC}'s: Means for International Comparison},
BOOKTITLE = {Proceedings of the IMEKO TC4 5th European Workshop on
ADC Modelling and Testing (EWADC)},
YEAR = 2000,
PAGES = {211--16},
EDITOR = {P. Daponte and L. Michaeli and M. N. Durakbasa and A. Afjehi-Sadat},
ADDRESS = {Vienna, Austria},
MONTH = {25--28~} # SEP,
ISBN = {3\,901888\,12\,8},
ABSTRACT = {ADC data sheets and test methods are
not yet standardized. A new attempt to create a common platform
for these is the draft standard IEEE-STD-1241. However, the
methods described in this standard need an extra effort from the
user to exactly understand and implement them. It is therefore
very reasonable to provide programs which implement these methods,
and allow manufacturers and users to use them. This assures that
the same characterizing quantities will be used for the same
purpose by everyone. The first attempt for this was a LabView
program announced in 1999. In this paper another implementation is
presented, running under MATLAB. This will hopefully extend the
number of the users of the methods described in the standard.},
KEYWORDS = {IEEE-STD-1241, ADC testing, sine wave method, MATLAB, EUPAS},
PDF = {pubs/imeko2000.pdf},
PS = {pubs/imeko2000.ps.gz},
CITEDBY = {1. J. Saliga, L. Michaeli, 'Software for metrological characterisation
of PC sound cards', Computer Standards and Interfaces, 25(1): 45-55, mar, 2003,
2. T. E. Linnenbrink and S. J. Tilden, 'IEEE 1241 Versus IEEE 1057: What's The Difference?'
IMEKO TC4 Workshop on ADC Modelling and Testing, Vienna, Sep. 26-28, 2000. Vol. 10, pp. 201-207.}
}
@INPROCEEDINGS{markus:ms01,
AUTHOR = {J\'{a}nos M\'{a}rkus},
TITLE = {A {MATLAB} Tool to Use and Test the {ADC}-Standard},
BOOKTITLE = {Proceedings of the 8th PhD Mini-Symposium},
YEAR = 2001,
PAGES = {26--27},
ORGANIZATION = {Budapest University of Technology and Economics, Department of Measurement
and Information Systems },
ADDRESS = {Budapest, Hungary},
ISBN = {963\,420\,668\,9},
MONTH = {31~} # JAN # { -- 1~} # FEB,
PDF = {pubs/ms2001.pdf},
PS = {pubs/ms2001.ps.gz}
}
@INPROCEEDINGS{markus:imtc01,
AUTHOR = {J\'{a}nos M\'{a}rkus and Istv\'{a}n Koll\'{a}r},
TITLE = {Standard Framework for {IEEE-STD-1241} in {MATLAB}},
BOOKTITLE = {Proceedings of the IEEE Instrumentation and Measurement Technology Conference
(IMTC'2001)},
YEAR = 2001,
PAGES = {1847--52},
VOLUME = 3,
ADDRESS = {Budapest Convention Centre, Budapest, Hungary},
MONTH = {21--23~} # MAY,
ISBN = {0\,7803\,6646\,8},
ABSTRACT = {The approval of the 1241 standard means
that all users and manufacturers of analog-to-digital converters
should use the terminology and test methods described in the
standard. However it is not an easy task to leave an already
developed, tested and used environment for a new one.
To inspire the users to use the standard, a program has been
developed, which realizes most of the described algorithms. The
program is also a testbed of new ideas, because it is very easy to
extend the existing code with new algorithms and to compare the
results to the standard using the same input and the same
precision.
The program has been written in MATLAB, and for easy of usage it
provides a graphical user interface. It is also flexible enough to
support different input/output file formats.
The program is available through the Internet.},
KEYWORDS = {ADC testing, IEEE-STD-1241, standardization, sine wave test
method, windowing, MATLAB, data acquisition},
PDF = {pubs/imtc2001.pdf},
PS = {pubs/imtc2001.ps.gz},
CITEDBY = {1. T. Andersson and P. H\:{a}ndel, 'Multiple-Tone Estimation by
IEEE Standard 1057 and the Expectation-Maximization Algorithm', IMTC'2003, pp. 739-742,
Vail, CO, USA, 20-22 may, 2003., 2. F. Adamo, F. Attivissimo and N. Giaquinto,
'MATLAB Toolboxes for A/D Converters Characterization', ADDA-EWADC'2002
pp. 203-206, Praga, Czeh Republic, June 26-28, 2002., 3. Daniel Belega
System for Testing Analog-to-Digital Converters, ADDA-EWADC'2002 pp. 223-226, Praga,
Czeh Republic, June 26-28, 2002, 4. E.Nunzi, C–code Software Implementation of Standardized ADC Test
Methods, IMTC 2004 – Instrumentation and Measurement Technology
Conference Como, Italy, 18-20 May 2004, pp 549-552}
}
@INPROCEEDINGS{markus:ms02,
AUTHOR = {J\'{a}nos M\'{a}rkus},
TITLE = {An Efficient Delta-Sigma Noise Shaping Architecture},
BOOKTITLE = {Proceedings of the 9th PhD Mini-Symposium},
YEAR = 2002,
PAGES = {52--53},
ORGANIZATION = {Budapest University of Technology and Economics, Department of Measurement
and Information Systems },
ADDRESS = {Budapest, Hungary},
ISBN = {963\,420\,682\,4},
MONTH = {4--5~} # FEB,
PDF = {pubs/ms2002.pdf},
PS = {pubs/ms2002.ps.gz}
}
@INPROCEEDINGS{markus:adda02,
AUTHOR = {J\'{a}nos M\'{a}rkus and Gabor C. Temes},
TITLE = {An Efficient Delta-Sigma Noise-Shaping Architecture for Wideband Applications},
BOOKTITLE = {Proceedings of the 4th International Conference on Advanced A/D and D/A
Conversion Techniques and their Applications; 7th European Workshop on ADC Modelling
and Testing (ADDA-EWADC 2002)},
YEAR = 2002,
PAGES = {35--38},
ADDRESS = {Prague, Czech Republic},
MONTH = {26--28~} # JUN,
ABSTRACT = {In this paper a new optimized multi-stage
Delta-Sigma structure is proposed. The method combines the
reduced-sample-rate architecture with the optimization of the
zeros of the noise transfer function (NTF). To achieve this, the
first stage of the decimation filter has to be modified as well.
Applying this method one can avoid the SNR loss introduced by
using the reduced-sample-rate second-stage. The SNR can actually
increase for higher-order structures. Simulation results for a 2-0
MASH structure with an oversampling ratio of 4 are shown to verify
the technique.},
KEYWORDS = {multi-stage delta-sigma modulator, MASH,
Leslie-Singh, reduced-sample-rate, modified (rotated) sinc
filter},
PDF = {pubs/adda2002a.pdf},
PS = {pubs/adda2002a.ps.gz},
SLIDES = {pubs/adda2002a_pres.pdf}
}
@INPROCEEDINGS{bilau:adda02,
AUTHOR = {Tam\'{a}s Zolt\'{a}n Bilau and Tam\'{a}s Megyeri and
Attila S\'{a}rhegyi and J\'{a}nos M\'{a}rkus and Istv\'{a}n Koll\'{a}r},
TITLE = {Four-Parameter Fitting of Sine Wave Testing Results -- Iteration and Convergence},
BOOKTITLE = {Proceedings of the 4th International Conference on Advanced A/D and D/A
Conversion Techniques and their Applications; 7th European Workshop on ADC Modelling
and Testing (ADDA-EWADC 2002)},
YEAR = 2002,
PAGES = {185--190},
ADDRESS = {Prague, Czech Republic},
MONTH = {26--28~} # JUN,
ABSTRACT = {Small improvements to the iteration
procedure of the IEEE Standard 1241-2001 are suggested, and
extension of the standard MATLAB program implementing the sine
wave test is discussed. The program is compatible with the LabView
program already announced, and in other working modes offers
extensions, too.},
KEYWORDS = {IEEE-STD-1241, ADC testing, sine wave method,
MATLAB, four-parameter method},
PDF = {pubs/adda2002b.pdf},
PS = {pubs/adda2002b.ps.gz},
CITEDBY = {T. Andersson and P. H\:{a}ndel, 'Multiple-Tone Estimation by
IEEE Standard 1057 and the Expectation-Maximization Algorithm', IMTC'2003, pp. 739-742,
Vail, CO, USA, 20-22 may, 2003.}
}
@INPROCEEDINGS{markus:ms03,
AUTHOR = {J\'{a}nos M\'{a}rkus},
TITLE = {Enhancing the Resolution of Incremental Converters with Dither},
BOOKTITLE = {Proceedings of the 10th PhD Mini-Symposium},
YEAR = 2003,
PAGES = {38--39},
ORGANIZATION = {Budapest University of Technology and Economics, Department of Measurement
and Information Systems },
ADDRESS = {Budapest, Hungary},
ISBN = {963\,420\,741\,3},
MONTH = {4--5~} # FEB,
PDF = {pubs/ms2003.pdf},
PS = {pubs/ms2003.ps.gz},
SLIDES = {pubs/ms2003_pres.pdf}
}
@INPROCEEDINGS{markus:wisp03,
AUTHOR = {J\'{a}nos M\'{a}rkus and Jos\'{e} Silva and Gabor C. Temes},
TITLE = {Design Theory of High-Order Incremental Converters},
BOOKTITLE = {Proceedings of the IEEE International Symposium on
Intelligent Signal Processing (WISP'2003)},
YEAR = 2003,
PAGES = {3--8},
ADDRESS = {Budapest, Hungary},
MONTH = {4--6~} # SEP,
ISBN = {0-7803-7864-4},
ABSTRACT = {A/D converters used in instrumentation and measurements
often require high \emph{absolute} accuracy, including high
linearity and negligible DC offset. The incremental (or
integrating) converter provides a solution for such measurement
applications, as it has all the advantages of the Delta-Sigma
converter, yet is capable of offset-free and accurate conversion.
In this conference paper, theoretical and practical aspects of
higher-order incremental converters are discussed. Operating
principles, topologies and specialized digital filter design
methods are addressed. The theoretical results are verified by
showing design examples and simulation results.},
KEYWORDS = {mixed-signal, incremental (integrating) A/D converter,
one-shot, one-cycle, no-latency converter, delta-sigma modulator,
decimating filter.},
PDF = {pubs/wisp2003.pdf},
SLIDES = {pubs/wisp2003_pres.pdf}
}
@INPROCEEDINGS{markus:imtc04,
AUTHOR = {J\'{a}nos M\'{a}rkus and Istv\'{a}n Koll\'{a}r},
TITLE = {On the Monotonicity and Linearity of Ideal Radix-based {A/D} Converters},
BOOKTITLE = {Proceedings of the IEEE Instrumentation and Measurement Technology Conference
(IMTC'2004)},
YEAR = 2004,
PAGES = {696--701},
VOLUME = 1,
ADDRESS = {Como, Italy},
MONTH = {18--20~} # MAY,
ISBN = {0-7803-8249-8},
OPTNOTE = {},
ABSTRACT = {Both cyclic and pipelined analog-to-digital
converters are getting more and more popular, as they are
relatively easy to design and either have a high throughput
(pipelined converters) or small area- and power-consumption
(cyclic/algorithmic converters). To avoid saturation and to ensure
effective digital calibration, in the analog stage(s) of these
converters, instead of the ideal two, often a smaller nominal gain
(called radix number) is used. In this paper properties of these
radix-based converters are discussed. First, it is shown that
these type of converters produce non-monotonic output. The causes
of this phenomena are discussed in detail and a method to avoid
non-monotonicity is suggested. Second, it is shown that even the
ideal sub-radix converters have limited linearity. Lower bound for
the differential non-linearity (DNL) is calculated. The results
about monotonicity can be used either to quickly locate and avoid
non-monotonic code transitions in a converter. The derived
expressions for the lower bound of the DNL can be used to estimate
the minimum required number of cycles (stages) for a converter to
push the DNL below the specification.},
KEYWORDS = {Analog-digital conversion, multi-stage pipelined, cyclic,
algorithmic, sub-ranging A/D converter, non-radix-2, radix less
then 2, sub-radix ADC, monotonicity, linearity, differential
non-linearity, DNL},
PDF = {pubs/imtc2004.pdf},
SLIDES = {pubs/imtc2004_pres.pdf}
}
@INPROCEEDINGS{markus:ms04,
AUTHOR = {J\'{a}nos M\'{a}rkus},
TITLE = {Monotonicity of Digitally Calibrated Cyclic {A/D} Converters},
BOOKTITLE = {Proceedings of the 11th PhD Mini-Symposium},
YEAR = 2004,
PAGES = {8--9},
ORGANIZATION = {Budapest University of Technology and Economics, Department of Measurement
and Information Systems },
ADDRESS = {Budapest, Hungary},
ISBN = {963\,420\,785\,5},
MONTH = {3--4~} # FEB,
PDF = {pubs/ms2004.pdf},
PS = {pubs/ms2004.ps.gz},
SLIDES = {pubs/ms2004_pres.pdf},
NOTE = {(Best presentation award in the category of 3rd
year PhD students)}
}
@INPROCEEDINGS{quiquempoix:esscirc05,
AUTHOR = {Vincent Quiquempoix and Philippe Deval and Alexandre Barreto
and Gabriele Bellini and Jerry Collings and J\'{a}nos M\'{a}rkus and Jos\'{e} Silva and
Gabor C.~Temes},
TITLE = {A low-power 22-bit incremental {ADC} with 4 ppm {INL}, 2 ppm gain
error and 2 {uV} {DC} offset},
BOOKTITLE = {ESSCIRC'2005, Proceedings of the 31st European Solid-State Circuits Conference},
YEAR = 2005,
PAGES = {446--446},
ADDRESS = {Grenoble, France},
MONTH = {12--16~} # SEP,
ABSTRACT = {A low-power 22-bit incremental ADC, including an onchip
digital filter and a low-noise/low-drift oscillator, was
realized in a 0.6-um CMOS process. It incorporates
a novel offset-cancellation scheme based on fractal sequences,
a novel high-accuracy gain control circuit, and
a novel reduced-complexity realization for the on-chip
sinc filter. The measured output noise was 0.28 ppm (2.8
uVRMS), the dc offset 2 uV, the gain error 2 ppm, and the
INL 4 ppm. The chip operates with a single 2.7 – 5 V
supply, and draws only 125 uA current during conversion.},
PDF = {pubs/esscirc05.pdf}
}
@INPROCEEDINGS{markus:cicc2006,
AUTHOR = {J\'{a}nos M\'{a}rkus and Jos\'{e} Silva and Gabor C.~Temes},
TITLE = {Delta-Sigma architectures for dc measurement - an overview (invited paper)},
BOOKTITLE = {CICC'2006, Proceedings of the IEEE 2006 Custom Integrated Circuits Conference},
YEAR = 2006,
PAGES = {TBA},
ADDRESS = {San Jose, CA, USA},
MONTH = {10--13~} # SEP,
ABSTRACT = {In this paper the theoretical operation of incremental
(charge-balancing) delta-sigma converters is reviewed, and the
implementation of a 22-bit incremental A/D converter is described.
Two different analyses of the first-order incremental converter are
presented, and based on these results two extensions to higher-order
modulators are proposed. Since line-frequency noise suppression is
often important in measurement applications, modulators followed by
sinck filters are also analyzed. Equations are derived for the
estimation of the required number of cycles for a given resolution
and architecture. Finally, the design and implementation of a
third-order incremental converter with a fourth-order sinc filter is
briefly discussed.},
PDF = {pubs/cicc06.pdf}
}
@INPROCEEDINGS{markus:vegzos99,
AUTHOR = {J\'{a}nos M\'{a}rkus},
TITLE = {Signal Model Based Synthesis of the Sound of Organ Pipes},
BOOKTITLE = {V\'{e}gz\H{o}s konferencia (Conference for graduated students)},
YEAR = 1999,
PAGES = {6--11},
ADDRESS = {Budapest, Hungary},
MONTH = {28~} # APR,
NOTE = {in Hungarian},
PDF = {pubs/vegzos99.pdf},
PS = {pubs/vegzos99.ps.gz}
}
@MANUAL{markus:adctest02,
AUTHOR = {J\'{a}nos M\'{a}rkus and Istv\'{a}n Koll\'{a}r},
TITLE = {{ADC} Test Data Evaluation Program for Matlab},
ORGANIZATION = {Budapest University of Technology and Economics,
Department of Measurement and Information Systems},
YEAR = 2002,
NOTE = {software},
ADDRESS = {\url{http://www.mit.bme.hu/projects/adctest/}}
}
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