Digital Correction Technique for Multi-Stage Noise-Shaping with an RC-Analog Integrator

Yasuyuki MATSUYA  Naohiko YUHKI  Yukio AKAZAWA  

IEICE TRANSACTIONS on Electronics   Vol.E77-C    No.12    pp.1912-1919
Publication Date: 1994/12/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Multimedia, Analog and Processing LSIs)
Category: Analog LSIs
A/D converter,  digital correction,  multi-stage,  noise-shaping,  RC-integrator,  

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A multi-stage noise-shaping (MASH) A/D converter combining an RC-integrator and a digital correction technique for high accuracy is described. Using 1.2-µm BiCMOS technology, we developed an A/D converter for digital audio with an S/N ratio of over 100 dB. This paper discusses the principles of MASH technology with an RC-integrator, the technique for correcting RC variation, and the experimental results obtained with a fabricated chip.