Gain and Offset Mismatch Calibration in Time-Interleaved Multipath A/D Sigma–Delta Modulators

Ferragina, V.; Fornasari, A.; Gatti, U.; Malcovati, P.; Maloberti, Franco

doi:10.1109/tcsi.2004.838154

Cited by 36 publications

(24 citation statements)

References 21 publications

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“…Several calibration techniques have been proposed [1], [5], [6], [8]- [16] to mitigate these towards realizing a high-speed, low bit-error-rate (BER) communication system. Out of the above-mentioned effects, DC-offset and gain mismatches are easily taken care of [6], [8], [9]. Calibrating for phase mismatches (through timing or bandwidth mismatches) proves to be a much more tedious task [2], [3], primarily because a simple scaling/subtraction operation does not suffice.…”

Section: Introductionmentioning

confidence: 99%

Enabling high-speed, high-resolution ADCs using signal conditioning algorithms

Ghosh

Pamarti

2013

2013 IEEE 56th International Midwest Symposium on Circuits and Systems (MWSCAS)

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Time-interleaving several identical A/D converters enhances the overall conversion speed in a power-economical way. However, mismatches between individual channels in such schemes degrade the overall dynamic range of the converter. Several algorithms to mitigate such effects are discussed with special emphasis on an adaptive signal-conditioning algorithm. The algorithm is further extended towards a hardware-friendly implementation using interpolation filters. Behavioral simulations corroborating the same are presented.

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Section: Introductionmentioning

confidence: 99%

Enabling high-speed, high-resolution ADCs using signal conditioning algorithms

Ghosh

Pamarti

2013

2013 IEEE 56th International Midwest Symposium on Circuits and Systems (MWSCAS)

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“…The non-linearities induced in the DAC of multi-bit modulators can also be reduced by the use of calibration [8,9]. Time-Interleaved solutions need calibration as the gain and offset errors induce spurious-tones [10].…”

Section: Introductionmentioning

confidence: 99%

A self-calibration scheme for extended frequency-band-decomposition sigma-delta ADC

Bénabès

Beydoun

2009

Analog Integr Circ Sig Process

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Frequency-band-decomposition (FBD) is a good candidate to be used to increase the bandwidths of ADC converters based on sigma-delta modulators for software and cognitive radio applications where we need to convert wide bandwidths. Each modulator processes a part of the band of the input signal which is then passed through a digital filter. In the case of large mismatches in the analog modulators, a new solution, called extended frequencyband-decomposition (EFBD) can be used. As an example, this solution can allow for a 4% error in the central frequencies without significant degradation of its performance when the digital processing part is paired with the analog modulators. A calibration of the digital part is thus required to reach these theoretical performances. This paper will focus on a self-calibration algorithm for an EFBD. The algorithm helps minimize the quantization noise of the EFBD and helps to flatten the signal transfer function.

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“…In the case of TimeInterleaved converters, gain and offset errors induce unwanted tones that can be minimized by an adequate calibration [6] [7], [8]. Such a calibration is performed by applying constant signals to each modulator and deducing the gain and offset from the filter outputs.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the noise transfer function of Extended-Frequency-Band-Decomposition sigma-delta A/D converters

Beydoun¹,

Benabes²,

Oksman³

2008

2008 Joint 6th International IEEE Northeast Workshop on Circuits and Systems and TAISA Conference

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Abstract-Frequency-Band-Decomposition (FBD) is a good candidate to increase the bandwidths of ADC converters based on sigma-delta modulators. Each modulator processes a part of the input signal band and is followed by a digital filter. In the case of large mismatches in the analog modulators, a new solution, called Extended Frequency-Band-Decomposition (EFBD) can be used. This solution allows for, for example, a four percent error in the central frequencies without significant degradation in the performance when the digital processing part is appeared to the analog modulators. A calibration of the digital part is thus required to reach these theoretical performance. This paper will focus on a self-calibration algorithm for an EFBD. The algorithm helps minimize the quantization noise of the EFBD.

show abstract

Gain and Offset Mismatch Calibration in Time-Interleaved Multipath A/D Sigma–Delta Modulators

Cited by 36 publications

References 21 publications

Enabling high-speed, high-resolution ADCs using signal conditioning algorithms

Enabling high-speed, high-resolution ADCs using signal conditioning algorithms

A self-calibration scheme for extended frequency-band-decomposition sigma-delta ADC

Optimization of the noise transfer function of Extended-Frequency-Band-Decomposition sigma-delta A/D converters

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