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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Bibliographic Details
Main Authors SCHREIER RICHARD E, DONG YUNZHI, YANG WENHUA W, SHIBATA HAJIME
Format Patent
LanguageEnglish
Published 03.11.2015
Subjects
BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DECODING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TELEPHONIC COMMUNICATION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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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.
Bibliography:Application Number: US201314057153