Two-step multi-stage incremental ADC

Chia-Hung Chen*, Yi Zhang, Tao He, Gabor C. Temes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)1975-1977
Number of pages3
JournalElectronics Letters
Volume51
Issue number24
DOIs
StatePublished - 19 Nov 2015

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