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A Noise-Coupled Time-Interleaved Delta-Sigma ADC With 4.2 MHz Bandwidth, -98 dB THD, and 79 dB SNDR | IEEE Journals & Magazine | IEEE Xplore

A Noise-Coupled Time-Interleaved Delta-Sigma ADC With 4.2 MHz Bandwidth, {-} 98 dB THD, and 79 dB SNDR


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-couple...Show More

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.
Published in: IEEE Journal of Solid-State Circuits ( Volume: 43, Issue: 12, December 2008)
Page(s): 2601 - 2612
Date of Publication: 12 December 2008

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