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An ISI Scrambling Technique for Dynamic Element Matching Current-Steering DACs.
- Source :
- IEEE Journal of Solid-State Circuits; Feb2022, Vol. 57 Issue 2, p465-479, 15p
- Publication Year :
- 2022
-
Abstract
- The linearity of high-resolution current-steering digital-to-analog converters (DACs) is often limited by inter-symbol interference (ISI). While dynamic element matching (DEM) can be applied to convert a portion of the ISI to uncorrelated noise instead of nonlinear distortion, DEM alone fails to prevent ISI from at least introducing strong second-order nonlinear distortion. This paper addresses this problem by proposing, analyzing, and experimentally demonstrating a low-cost add-on technique, called ISI scrambling, that, in conjunction with DEM, causes a DAC’s ISI to be free of nonlinear distortion. The ISI scrambling technique is demonstrated in a 1-GS/s, 14-bit DEM DAC implemented in 90 nm CMOS technology. The DAC’s measured linearity is in line with the state-of-the-art and its measured output power spectra closely match those predicted by this paper’s theoretical results. [ABSTRACT FROM AUTHOR]
- Subjects :
- DIGITAL-to-analog converters
POWER spectra
TRANSIENT analysis
Subjects
Details
- Language :
- English
- ISSN :
- 00189200
- Volume :
- 57
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- IEEE Journal of Solid-State Circuits
- Publication Type :
- Academic Journal
- Accession number :
- 154974510
- Full Text :
- https://doi.org/10.1109/JSSC.2021.3085587