Stmicroelectronics S.a.

Thierry Simon

Pascal Urard

Nicolas Le Dortz

Caroline Lelandais-Perrault

Rakhel Kumar Parida

A device can be used for compensating bandwidth mismatches of time interleaved analog to digital converters. A processor of the device determines, for each original sample stream, an estimated difference between the time constant of a low pass filter representative of the corresponding converter and a reference time constant of a reference low pass filter, and uses this estimated difference and a filtered stream to correct the original stream and deliver a corrected stream of corrected samples.

Method and device for compensating bandwidth mismatches of time interleaved analog to digital converters

According to one mode of implementation, a method includes an estimation including on the one hand a correlation processing involving at least one part of the sampled signal, at least one part of at least one first signal gleaned from a derived signal representative of a temporal derivative of the sampled signal and at least one part of N partial filtered signals respectively representative of N weighted differences between N pairs of bracketing versions flanking the sampled signal, N being greater than or equal to 1. On the other hand, the estimation includes a matrix processing on the results of this correlation processing. Correction processing of the M&#x2212;1 trains involves respectively M&#x2212;1 second signals gleaned from the derived signal and the suite of M&#x2212;1 shift coefficients.

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Grenoble, France

Thierry Simon