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A new technique for on-chip error estimation and reconfiguration of current-steering digital-to-analog converters

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2 Author(s)
Rafeeque, K.P.S. ; Dept. of Electr. Eng., Indian Inst. of Technol.-Madras, India ; Vasudevan, V.

In this paper, we propose a reconfigurable current-steering digital-to-analog converter (DAC). The differential nonlinearity error (DNL) of the DAC is estimated on-chip. This is used to reconfigure the switching sequence to get a lower integral nonlinearity error (INL). We propose a novel technique for estimation of DNL based on a step-size measurement. This greatly reduces the linearity and dynamic range requirements of the measuring circuits. A 10-b segmented DAC, along with the associated circuits for DNL estimation and reconfiguration, was designed using 0.35-μm CMOS technology and fabricated through Europractice. The paper includes theoretical analysis, simulation, and experimental results for the proposed technique.

Published in:

Circuits and Systems I: Regular Papers, IEEE Transactions on  (Volume:52 ,  Issue: 11 )

Date of Publication:

Nov. 2005

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