학술논문
A Noise-Coupled Time-Interleaved Delta-Sigma ADC With 4.2 MHz Bandwidth, ${-}$ 98 dB THD, and 79 dB SNDR
Document Type
Periodical
Author
Source
IEEE Journal of Solid-State Circuits IEEE J. Solid-State Circuits Solid-State Circuits, IEEE Journal of. 43(12):2601-2612 Dec, 2008
Subject
Language
ISSN
0018-9200
1558-173X
1558-173X
Abstract
This paper describes a wideband high-linearity ΔΣ ADC. It uses noise coupling combined with time interleaving. Two versions of a two-channel time-interleaved noise-coupled ΔΣ ADC were realized in a 0.18-μ CMOS technology. Noise coupling between the channels increases the effective order of the noise-shaping loops, provides dithering, and prevents tone generation in all loops. Time interleaving enhances the effects of noise coupling. Using a 1.5 V supply, the device achieved excellent linearity (SFDR > 100 db, THD = -98) and an SNDR of 79 dB in a 4.2 MHz signal band.