Sigma Delta converters are a very popular choice for the A/D
converter in multi-standard, mobile and cellular receivers. Key A/D
converter specifications are high dynamic range, robustness,
scalability, low-power and low EMI. "Robust Sigma Delta Converters
"presents a requirement derivation of a Sigma Delta modulator
applied in a receiver for cellular and connectivity, and shows
trade-offs between RF and ADC. The book proposes to categorize
these requirements in 5 quality indicators which can be used to
qualify a system, namely accuracy, robustness, flexibility,
efficiency and emission. In the book these quality indicators are
used to categorize Sigma Delta converter theory. A few highlights
on each of these quality indicators are; Quality indicators:
provide a means to quantify system quality.Accuracy: introduction
of new Sigma Delta Modulator architectures.Robustness: a
significant extension on clock jitter theory based on phase and
error amplitude error models. Extension of the theory describing
aliasing in Sigma Delta converters for different types of DACs in
the feedback loop. Flexibility: introduction of a Sigma Delta
converter bandwidth scaling theory leading to very flexible Sigma
Delta converters. Efficiency: introduction of new Figure-of-Merits
which better reflect performance-power trade-offs. Emission:
analysis of Sigma Delta modulators on emission is not part of the
book
The quality indicators also reveal that, to exploit nowadays
advanced IC technologies, things should be done as much as possible
digital up to a limit where system optimization allows reducing
system margins. At the end of the book Sigma Delta converter
implementations are shown which are digitized on application-,
architecture-, circuit- and layout-level.
"Robust Sigma Delta Converters "is written under the assumption
that the reader has some background in receivers and in A/D
conversion.
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