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Archive for October, 2011

Blogger’s block?

No one ever gets talker’s block. No one wakes up in the morning, discovers he has nothing to say and sits quietly, for days or weeks, until the muse hits, until the moment is right, until all the craziness in his life has died down.

Why then, is writer’s block endemic?

From an interesting blog post, complete with bonus link to Ira Glass interview.

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Today, my paper on Tunable Mismatch Shaping for Quadrature Bandpass Delta-Sigma Data Converters was published in the Journal of Signal Processing Systems, Volume 65, Number 2, pp 199-210, November 2011.

From the abstract:

This paper presents an architecture for quadrature bandpass mismatch shaping that allows the center frequency of the mismatch suppression band to be tunable over the entire Nyquist range. The approach is based on the previously reported complex-valued tree-based mismatch shaper, and extends this to allow tunable operation. The proposed design has been implemented using VHDL and synthesized to logic gates. The hardware complexity and mismatch shaping performance of the proposed architecture are compared to that of a reference architecture, which uses separate tunable mismatch shapers for each complex component path. Simulation results show consistent mismatch shaping performance across the entire tuning range.

A pre-publication version of the paper can be downloaded here (pdf).

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