DocumentCode :
1002819
Title :
A Noise-Coupled Time-Interleaved Delta-Sigma ADC With 4.2 MHz Bandwidth, 
98 dB THD, and 79 dB SNDR
Author :
Lee, Kyehyung ; Chae, Jeongseok ; Aniya, Mitsuru ; Hamashita, Koichi ; Takasuka, Kaoru ; Takeuchi, Seiji ; Temes, Gabor C.
Author_Institution :
Conexant Syst., Newport Beach, CA, USA
Volume :
43
Issue :
12
fYear :
2008
Firstpage :
2601
Lastpage :
2612
Abstract :
This paper describes a wideband high-linearity ¿¿ ADC. It uses noise coupling combined with time interleaving. Two versions of a two-channel time-interleaved noise-coupled ¿¿ ADC were realized in a 0.18-¿m 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 dB) and an SNDR of 79 dB in a 4.2 MHz signal band.
Keywords :
CMOS digital integrated circuits; delta-sigma modulation; harmonic distortion; CMOS technology; frequency 4.2 MHz; noise-coupled time-interleaved delta-sigma ADC; noise-shaping loops; size 0.18 mum; voltage 1.5 V; Bandwidth; CMOS technology; Circuits; Clocks; Filters; Interleaved codes; Jitter; Noise shaping; Power dissipation; Wideband; Delta-sigma ADC; SC circuit; discrete-time; noise coupling; time interleaving;
fLanguage :
English
Journal_Title :
Solid-State Circuits, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9200
Type :
jour
DOI :
10.1109/JSSC.2008.2006311
Filename :
4684640
Link To Document :
