alexa Design and Implementation of 8-Bit SAR ADC with Built-in-Self- Calibration and Digital-Trim Technique
ISSN ONLINE(2278-8875) PRINT (2320-3765)

International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering
Open Access

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Research Article

Design and Implementation of 8-Bit SAR ADC with Built-in-Self- Calibration and Digital-Trim Technique

 
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Abstract

The successive approximation register (SAR) topology is probably the one that has benefited most from CMOS technology evolution, and is now a strong competitor with other architectures as the pipeline, for medium-resolution medium speed ADCs, and the flash, for low-resolution high-speed ADCs. In this system, propose a SAR ADC with a very low-power background calibration technique that continuously nullifies the comparator offset and operates within the supply-voltage range of the ADC. This method allows the comparator to be implemented with small transistors, reducing the power consumption. Furthermore, being a continuous calibration procedure, it is automatically adapting to changes in process, voltage, and temperature (PVT).For operating with a supply voltage as low mV compare with existing methods, close to the transistors threshold voltage V , the ADC employs local voltage boosting for all the MOS switches. To avoid this TH solution to be a strong penalty to the available area/power budget, a voltage-booster (VB) with minimal complexity is employed.

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