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Publication Detail
Stable boundaries of a third-order sigma-delta modulator
This paper studies the stable boundary of a type of third-order one-bit sigma-delta modulator \Sigma \Delta M using an extended describing function method in which both the amplitude and phase shift of a sampled quantiser are modelled. By determination of the maximum DC input for the feedback coefficients of the sigma-delta modulator, the performance of the system can be optimised for stable modulator operation. This approach is potentially useful in the design and stability analysis of higher-order \Sigma \Delta Ms.
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