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Continuous-Time Delta-Sigma Modulators for High-Speed A/D Conversion - Theory, Practice and Fundamental Performance Limits (Hardcover, 2000 ed.)
Loot Price: R5,865
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Continuous-Time Delta-Sigma Modulators for High-Speed A/D Conversion - Theory, Practice and Fundamental Performance Limits (Hardcover, 2000 ed.)
Series: The Springer International Series in Engineering and Computer Science, 521
Expected to ship within 10 - 15 working days
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Among analog-to-digital converters, the delta-sigma modulator has
cornered the market on high to very high resolution converters at
moderate speeds, with typical applications such as digital audio
and instrumentation. Interest has recently increased in delta-sigma
circuits built with a continuous-time loop filter rather than the
more common switched-capacitor approach. Continuous-time
delta-sigma modulators offer less noisy virtual ground nodes at the
input, inherent protection against signal aliasing, and the
potential to use a physical rather than an electrical integrator in
the first stage for novel applications like accelerometers and
magnetic flux sensors. More significantly, they relax settling time
restrictions so that modulator clock rates can be raised. This
opens the possibility of wideband (1 MHz or more) converters,
possibly for use in radio applications at an intermediate frequency
so that one or more stages of mixing might be done in the digital
domain. Continuous-Time Delta-Sigma Modulators for High-Speed A/D
Conversion: Theory, Practice and Fundamental Performance Limits
covers all aspects of continuous-time delta-sigma modulator design,
with particular emphasis on design for high clock speeds. The
authors explain the ideal design of such modulators in terms of the
well-understood discrete-time modulator design problem and provide
design examples in Matlab. They also cover commonly-encountered
non-idealities in continuous-time modulators and how they degrade
performance, plus a wealth of material on the main problems
(feedback path delays, clock jitter, and quantizer metastability)
in very high-speed designs and how to avoid them. They also give a
concrete design procedure for a real high-speed circuit which
illustrates the tradeoffs in the selection of key parameters.
Detailed circuit diagrams, simulation results and test results for
an integrated continuous-time 4 GHz band-pass modulator for A/D
conversion of 1 GHz analog signals are also presented.
Continuous-Time Delta-Sigma Modulators for High-Speed A/D
Conversion: Theory, Practice and Fundamental Performance Limits
concludes with some promising modulator architectures and a list of
the challenges that remain in this exciting field.
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