Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Patent
1996-03-22
1998-04-21
Young, Brian K.
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
341172, 341155, H03M 302
Patent
active
057422460
ABSTRACT:
The invention relates to a technique called "Internal Linear Feedback (ILF)" for the stabilization of high-order sigma-delta modulators. The ILF technique involves an overload detector and a selector. Once "overloaded" is detected by the overload detector, the selector is activated to make the modulator entering the ILF mode, in which additional internal linear feedback paths are employed to stabilize the modulator. Otherwise, the modulator operates in normal mode as a general high-order modulator.
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Chris Dunn and Mark Sandler, "Use of Clipping in Sigma-Delta Modulators," IEE, Savoy Place, London WC2R OBL, UK, pp. 8/1-8/9 (1994).
S. Mohsen Moussavi et al., "High-Order Single-Bit Oversampling A/D Converter Stabilized with Local Feedback Loops," IEEE Trans. on Circuits and Systems--II: Analog and Digital Signal Processing, vol. 41, No. 1, Jan. 1994, pp. 19-25.
Chen Jhy-Rong
Chen Kuan-Dar
Kuo Tai-Haur
Wang Wen-Chyi
Yeh Jhy-Woei
Kost Jason L.W.
National Science Council
Young Brian K.
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