Single-loop switched-capacitor analog-to-digital sigma-delta...

Details Single-loop switched-capacitor analog-to-digital sigma-delta... Single-loop switched-capacitor analog-to-digital sigma-delta...

2007-10-09

2007-10-09

Nguyen, Khai M. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S143000, C341S155000

Reexamination Certificate

active

11423200

ABSTRACT:
A single-loop differential switched-capacitor sigma-delta converter has a three stage double-sampling architecture with reduced current consumption. The converter is stable for large input dynamics, which makes it suitable for RF applications. The three-stage multi-bit double-sampled architecture has a single-loop architecture in which all integrators are included in a same feedback loop. This has been made possible based upon the type of integrators that are connected in cascade. Functioning of the converter is less sensitive to nonlinearities of the operational amplifiers of the integrators.

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Rombouts et al., Design of Double-Sampling ΣΔ Modulation A/D Converters with Billinear Integrators, IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, vol. 52, No. 4, Apr. 4, 2005, pp. 715-722.
Bazarjani et al., A 40 MHz IF fourth-order Double-Sampled SC Bandpass ΣΔ Modulator, Circuits and Systems, 1997, Proceedings of 1997 IEEE International Symposium on Hong Kong, Jun. 9-12, 1997, vol. 1, pp. 73-76.

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