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Two-Dimensional Structure Compatible with DEM Methods Utilizing in DACs

Mehdi Bandali

Faculty of Electrical Engineering, Shahid Beheshti University, G.C., Tehran, Iran

E-mail Address: m.bandali@mail.sbu.ac.ir

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and

Omid Hashemipour

Faculty of Electrical Engineering, Shahid Beheshti University, G.C., Tehran, Iran

E-mail Address: hashemipour@sbu.ac.ir

Corresponding author.

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https://doi.org/10.1142/S0218126618501426Cited by:3 (Source: Crossref)

Abstract

A two-dimensional digital-to-analog converter (DAC) structure compatible with dynamic element matching (DEM) methods is presented. Unlike the DACs using segmented structure for employing DEM, the new structure randomizes inter-segment error. This advantage is achieved because of the characteristics of the algorithm of two-dimensional decoding. The simulation results in 180nm CMOS technology, 319.72MHz signal frequency and 800MS/s sample rate for an 8-bit two-dimensional DAC utilizing the presented structure, shows 14.94dB spurious-free dynamic range (SFDR) improvement compared to the SFDR of the same DAC without employing the presented structure. Also, the IMD3 of the DAC employing the presented structure for $F_{in1} = 317.77$ MHz and $F_{in2} = 319.72$ MHz is 50.1dB.

This paper was recommended by Regional Editor Piero Malcovati.

Keywords:

References

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