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

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 nois...

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Bibliographic Details
Published in:IEEE journal of solid-state circuits 2008-12, Vol.43 (12), p.2601-2612
Main Authors: Kyehyung Lee, Jeongseok Chae, Aniya, M., Hamashita, K., Takasuka, K., Takeuchi, S., Temes, G.C.
Format: Article
Language:English
Subjects:
Applied sciences
Bandwidth
Circuit properties
Circuits
Clocks
CMOS technology
Delta-sigma ADC
Design. Technologies. Operation analysis. Testing
discrete-time
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Filters
Integrated circuits
Interleaved codes
Jitter
noise coupling
Noise shaping
Power dissipation
SC circuit
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Signal convertors
time interleaving
Wideband
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Summary: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.
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2008.2006311