Calibration Techniques in Nyquist A/D Converters analyses different A/D-converter architectures with an emphasis on the maximum achievable power efficiency. It is shown that in order to achieve high speed and high accuracy at high power efficiency, calibration is required. Calibration reduces the overall power consumption by using the available digital processing capability to relax the demands on critical power hungry analog components. Several calibration techniques are analyzed.
The calibration techniques presented in this book are applicable to other analog-to-digital systems, such as those applied in integrated receivers. Further refinements will allow using analog components with less accuracy, which will then be compensated by digital signal processing. The presented methods allow implementing this without introducing a speed or power penalty.
Зміст
Accuracy, speed and power relation.- A/D converter architecture comparison.- Enhancement techniques for two-step A/D converters.- A 10-bit two-step ADC with analog online calibration.- A 12-bit two-step ADC with mixed-signal chopping and calibration.- A low-power 16-bit three-step ADC for imaging applications.- Conclusions.
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