Sigma-delta modulator and method for sigma-delta modulation

Details Sigma-delta modulator and method for sigma-delta modulation Sigma-delta modulator and method for sigma-delta modulation

2007-03-23

2008-09-02

Jeanglaude, Jean B (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from differential codes

C341S143000, C341S155000

Reexamination Certificate

active

07420485

ABSTRACT:
A sigma-delta modulator is supplied with a data word and includes a first and at least one further modulation stage, each having at least two adders. The adders in the first modulation stage process a low-significance component and a delayed more significant component of the data word and provide a result word and a carry at their respective outputs. The adders in the at least one further modulation stage process a low-significance component and a more significant component of the result word and provide a further result word and a carry at their respective outputs. The low-significance component and the more significant component of the result word are provided to the further modulation stages with an unvarying delay. A bit stream is derived from a carry from final instances of the at least two adders in the first modulation stage and in the further modulation stage respectively.

REFERENCES:
patent: 2005/0225463 (2005-10-01), Rezeq et al.
patent: 2006/0038710 (2006-02-01), Staszewski et al.

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