Open AccessTwo‐step multi‐stage incremental ADC
Author(s) -
Chen ChiaHung,
Zhang Yi,
He Tao,
Temes Gabor C.
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2015.3005
Subject(s) - oversampling , noise shaping , bandwidth (computing) , delta sigma modulation , computer science , electronic engineering , signal to noise ratio (imaging) , noise (video) , amplifier , single stage , engineering , artificial intelligence , telecommunications , image (mathematics) , aerospace engineering
Multi‐stage noise‐shaping (MASH) is a useful technique for the design of stable high‐order ΔΣ modulators. A two‐step MASH incremental ADC (IADC) is proposed. In the first step it performs a third‐order coarse quantisation. Using the same hardware, in the second step the circuit performs fine quantisation as a second‐order IADC. Thus, it achieves fifth‐order noise shaping with only three amplifiers. For an oversampling ratio OSR = 32, the signal‐to‐noise ratio can be boosted by about 30 dB. The scheme is suitable for wide bandwidth applications.