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Design of a 79 dB 80 MHz 8X-OSR Hybrid Delta-Sigma/Pipelined ADC

TitleDesign of a 79 dB 80 MHz 8X-OSR Hybrid Delta-Sigma/Pipelined ADC
Publication TypeJournal Article
Year of Publication2010
AuthorsRajaee, O., T. Musah, N. Maghari, S. Takeuchi, M. Aniya, K. Hamashita, and U. Moon
JournalIEEE Journal of Solid-State Circuits
Volume45
Issue4
Pagination719 - 730
Date Published04/2010
ISSN1558-173X
Keywordsdelta-sigma modulation, feedback DAC, loop filter, noise shaping, oversampling converters, pipelined analog-to-digital converter, switched-capacitor circuits
Abstract

A hybrid delta-sigma/pipelined modulator is presented in this paper. The proposed modulator takes advantage of the high resolution and distributed pipelined quantization, and combines it with the noise shaping property of a delta-sigma modulator. As a result, gain, swing, and slew requirements of the integrators are significantly reduced. The modulator also makes use of the latency in the pipelined quantization to enhance noise shaping. These advantages lead to less power dissipation, increased stability, and higher resolution. The prototype chip is implemented in a 0.18 ¿m CMOS process. With an 80 MHz clock, and an oversampling ratio of 8 (5 MHz bandwidth), the measured dynamic range and SNDR of this prototype IC are 79 dB and 75.4 dB.

DOI10.1109/JSSC.2010.2042246
Short TitleIEEE J. Solid-State Circuits