Multi-stage noise shaping analog-to-digital converter
The present disclosure describes an improved multi-stage noise shaping (MASH) analog-to-digital converter (ADC) for converting an analog input signal to a digital output signal. In particular, a full delta-sigma ( ) modulator is provided at the front-end of the MASH ADC, and another full modulator i...
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Main Authors | , , , |
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Format | Patent |
Language | English |
Published |
03.11.2015
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Subjects | |
Online Access | Get full text |
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Summary: | The present disclosure describes an improved multi-stage noise shaping (MASH) analog-to-digital converter (ADC) for converting an analog input signal to a digital output signal. In particular, a full delta-sigma ( ) modulator is provided at the front-end of the MASH ADC, and another full modulator is provided at the back-end of the MASH ADC. The front-end modulator digitizes an analog input signal, and the back-end modulator digitizes an error between the output of the front-end modulator and the (original) analog input signal. In this configuration where the back-end modulator digitizes the error of the (full) front-end modulator, some design constraints of the front-end are relaxed. These design constraints include thermal noise, digital noise cancellation filter complexity (the quantization noise of the front-end is already shaped by the noise transfer function of the front-end), and/or non-linearity. |
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Bibliography: | Application Number: US201314057153 |