IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
A novel approach to implement summing function for feedforward Δ-Σ AD modulator
Jun WangToru IdoToshimasa MatsuokaKenji Taniguchi
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2008 Volume 5 Issue 12 Pages 457-463

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Abstract

A novel approach is proposed to implement summing function for feedforward Δ-Σ modulator. Unlike the conventional methods, neither summing op-amp nor a large number of summing capacitors are used in our design. The high-accuracy summing function is accomplished by using a few capacitors with small size to compensate the summing error caused by parasitic capacitance, thereby resulting in a smaller chip area and no additional power dissipation.

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© 2008 by The Institute of Electronics, Information and Communication Engineers
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