2016
DOI: 10.1109/tcsii.2015.2483423
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All-Digital Calibration of Timing Skews for TIADCs Using the Polyphase Decomposition

Abstract: This paper proposes a new all-digital calibration technique suppressing the timing mismatch effect in Time-Interleaved Analog-to-digital Converters (TIADCs) for input at any Nyquist Band (NBs) using the equivalent polyphase structure of the TIADC. The correction technique is simple and does not require the adaptive digital synthesis filters. The timing mismatch is estimated based on an adaptive stochastic gradient descent technique, which is a promising solution for TIADCs operating at very fast sampling rate.… Show more

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Cited by 58 publications
(9 citation statements)
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“…Taking the advantages of CMOS scaling and portability between technology nodes, all-digital calibration techniques eliminate the above analog and mixed-signal issues [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. These techniques often focus on one or two types of mismatches among the gain and timing mismatches, without the offset mismatch [13][14][15][16][17][18][19][20][21][22][23][24][25]. The authors in [30] proposed a technique to calibrate all of three above mismatches.…”
Section: U Xmentioning
confidence: 99%
See 1 more Smart Citation
“…Taking the advantages of CMOS scaling and portability between technology nodes, all-digital calibration techniques eliminate the above analog and mixed-signal issues [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. These techniques often focus on one or two types of mismatches among the gain and timing mismatches, without the offset mismatch [13][14][15][16][17][18][19][20][21][22][23][24][25]. The authors in [30] proposed a technique to calibrate all of three above mismatches.…”
Section: U Xmentioning
confidence: 99%
“…Some of these perform the channel mismatch calibration in either the all-analog domain or mixed-signal domain [7][8][9][10][11][12]. The all-analog calibration techniques have the drawbacks of very complicated analog estimation circuits, low accuracy, and CMOS technology unsuitability [13]. On the other hand, the mixed-signal calibration techniques require low power consumption and small chip area.…”
Section: Introductionmentioning
confidence: 99%
“…From (12), it can be seen that the TIADC output y(n) can be generated by feeding the input signal x(n) through an Mperiodic time-varying polynomial function…”
Section: System Modelmentioning
confidence: 99%
“…Unfortunately, the non-ideal effects in the analog building block implementations cause significant performance degradation for TIADC system [6,7]. During the past few decades, the estimation and compensation methods for offset, gain, time, and frequency mismatches are investigated extensively [8][9][10][11][12][13]. In recent years, there has been an increasing interest in nonlinear mismatch problems in TIADC system [14][15][16][17][18][19][20][21][22][23][24][25].…”
Section: Introductionmentioning
confidence: 99%
“…H. Le Duc et al extended this technique to all NBs with relaxed constraints on input, by adding a Hilbert filter on the basis of the derivative filter [26,28]. Later, they eliminated the limit on the number of sub-ADC channels [32,33]. However, the calibration techniques proposed in [32] and [33] also have a couple of limitations: (1) When implemented in an FPGA, a considerable amount of DSPs are wasted as these techniques are not specifically optimized for DSPs.…”
mentioning
confidence: 99%