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Time-interleaved sigma-delta modulator using output prediction scheme

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2 Author(s)
Kye-Shin Lee ; Dept. of Electr. Eng., Univ. of Texas, Richardson, TX, USA ; F. Maloberti

A time-interleaved sigma-delta modulator using the output prediction scheme is proposed. This approach uses only one integrator channel along with incomplete integrator output terms to eliminate the quantizer domino which is a key limit for practical circuit implementation of conventional time-interleaved sigma-delta modulators. In addition, channel mismatch effects due to mismatch within multiple integrator feedback paths can be reduced by optimizing the feedback path. An equivalent two-channel time-interleaved version of the conventional second-order sigma-delta modulator is realized to verify the proposed method.

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IEEE Transactions on Circuits and Systems II: Express Briefs  (Volume:51 ,  Issue: 10 )