Multiple input sigma-delta architecture

Details Multiple input sigma-delta architecture Multiple input sigma-delta architecture

2007-02-13

2007-02-13

Barnie, Rexford (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S155000

Reexamination Certificate

active

11235946

ABSTRACT:
A number of parallel modulation functions are configured to provide sigma-delta modulation on a plurality of low sampling rate signals, which are representative of a high sampling rate input signal. Resultant sigma-delta modulated signals from each of the modulation functions are combined in a multiplexing fashion to create a high sampling rate output signal. The modulation functions may be interdependent, wherein error signals from the modulation functions are provided to a parallel block digital filter, which will provide a processed error signal to feed back into the input of each modulation function. The processed error signal for a given modulation function may be a function of the error signals derived from multiple ones of the modulation functions. In one embodiment, there are N modulation functions, and the operating rate of the modulation functions is fs/N wherein the sampling rate of the high frequency output signal is fs.

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patent: 6518905 (2003-02-01), Siferd
patent: 6535154 (2003-03-01), Sculley
patent: 6987953 (2006-01-01), Morris et al.

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