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Performance Analysis of a Hybrid Incremental and Cyclic A/D Conversion Principle

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3 Author(s)
Rossi, L. ; Electron. & Signal Process. Lab., Univ. of Neuchatel, Neuchatel, Switzerland ; Tanner, S. ; Farine, P.-A.

This paper presents a new hybrid A/D conversion principle based on the combination of an incremental conversion for the most significant part of the result and on a cyclic conversion for the least significant part. The proposed approach exhibits a resolution comparable to a multiorder sigma-delta A/D converter (ADC), but with a higher conversion rate (typically a factor of two) and/or a lower complexity, at the cost of a more stringent antialiasing filter requirement. After having presented the basic equations of the conversion principle, a theoretical analysis of the resolution limitations is given, based on nonidealities and noise considerations. Finally, a switched-capacitor implementation example is given with the corresponding simulations, consisting of a low-complexity 14-b ADC suited for applications requiring medium-speed and very compact ADC.

Published in:

Circuits and Systems I: Regular Papers, IEEE Transactions on  (Volume:56 ,  Issue: 7 )

Date of Publication:

July 2009

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