A Dynamic Zoom ADC for Instrumentation Applications

Master thesis (2017)

Authors

S. Karmakar Electrical Engineering, Mathematics and Computer Science

Contributors

K.A.A. Makinwa (supervisor 1)
Faculty
Electrical Engineering, Mathematics and Computer Science
Copyright: © 2017 Shoubhik Karmakar
Zoom ADC
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Published Date

31-10-2017

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Abstract

Analog to digital converters (ADCs) are critical blocks in most signal processing chains.
Especially in low bandwidth applications, there exists a need to digitize signals with high resolution and accuracy, while at the same time, expending minimum energy.
This thesis presents a dynamic zoom ADC for use in such applications. The zoom ADC employs a high-speed asynchronous SAR ADC which works in tandem with a fully differential ΔΣ ADC. Fabricated in a 0.16-μm CMOS process, the prototype occupies 0.26 mm2 and achieves 119.1 dB peak SNR, 118.1 dB peak SNDR and 120.3 dB dynamic range in a 1 kHz bandwidth, while consuming 280 μW; resulting in a Schreier FoM of 185.8 dB.