求书：The Design of Low-Voltage_ Low-Power Sigma-Delta Modulators

meidinlei

S. Rabii, B.A. Wooley
The Design of Low-Voltage, Low-Power Sigma-Delta Modulators
Series: The Springer International Series in Engineering and Computer Science, Vol. 483

Oversampling techniques based on sigma-delta modulation are widely used to
implement the analog/digital interfaces in CMOS VLSI technologies. This approach is
relatively insensitive to imperfections in the manufacturing process and offers numerous
advantages for the realization of high-resolution analog-to-digital (A/D) converters in the
low-voltage environment that is increasingly demanded by advanced VLSI technologies
and by portable electronic systems. In The Design ofLow-Voltage, Low-Power Sigma-Delta
Modulators, an analysis of power dissipation in sigma-delta modulators is presented, and
a low-voltage implementation of a digital-audio performance A/D converter based on the
results of this analysis is described.

Although significant power savings can typically be achieved in digital circuits by reducing
the power supply voltage, the power dissipation in analog circuits actually tends to
increase with decreasing supply voltages. Oversampling architectures are a potentially
power-efficient means of implementing high-resolution A/D converters because they
reduce the number and complexity of the analog circuits in comparison with Nyquistrate
converters. In fact, it is shown that the power dissipation of a sigma-delta modulator
can approach that of a single integrator with the resolution and bandwidth required for
a given application. In this research the influence of various parameters on the power
dissipation of the modulator has been evaluated and strategies for the design of a powerefficient
implementation have been identified.

The Design of Low-Voltage, Low-Power Sigma-Delta Modulators begins with an overview
of A/D conversion, emphasizing sigma-delta modulators. It includes a detailed analysis
of noise in sigma-delta modulators, analyzes power dissipation in integrator circuits, and
addresses practical issues in the circuit design and testing of a high-resolution modulator.
The Design of Low-Voltage, Low-Power Sigma-Delta Modulators will be of interest to
practicing engineers and researchers in the areas of mixed-signal and analog integrated
circuit design.

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