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Digitale Medien

Stabilization of third-order, single-stage Sigma-Delta modulators (1999)

Pneumatikakis, A. ; Constantinides, A. G. ; Deliyannis, T. ; [weitere]

Springer

Circuits, systems and signal processing 18 (1999), S. 149-168

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Details

ISSN: 1531-5878

Quelle: Springer Online Journal Archives 1860-2000

Thema: Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: Abstract The issue of stability of higher-order, single-stage Sigma-Delta (ΣΔ) modulators is addressed using a method from nonlinear system theory. As a result, theoretical bounds for the quantizer input of the modulators are derived. A new method for stabilizing the ΣΔ modulators is then presented. It uses the quantizer input bound for possible instability detection. Upon detection of such a state, the highest-order integrator is cut off, effectively reducing the order of the modulator, and thus resulting in a stable system. The method is easily implemented and results in a very good signal-to-noise ratio (SNR) and fast return to normal operation compared to other stabilization methods.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01206680

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