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Time Interleaved Delta Sigma Modulator

Abstract

In order to overcome the so-called delayless path problem, a time interleaved delta sigma modulator includes a plurality of paths for respective time interleaved data channels, said paths comprising a feed forward path arrangment, including first, second and third filter stages (3a, 3b, 3c), a first path including a first quantizer (Q1 64) being connected to a second feedback path (8) including a DAC (92), and the output of the first DAC having a coupling (31) to the input of the second quantizer intentionally introducing errors in the analog domain, and the output of the first quantizer being coupled to the output of the second quantizer via a correction means performing a difference between the present time sample and the previous one and correcting the intentional errors introduced by said coupling (31)

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