Method for converting an analog signal to multiple different...

Details Method for converting an analog signal to multiple different... Method for converting an analog signal to multiple different...

2007-09-04

2007-09-04

Jeanglaude, Jean Bruner (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S143000, C341S155000, C375S316000, C375S216000, C375S350000

Reexamination Certificate

active

11457825

ABSTRACT:
A method for converting an analog signal to multiple different phase outputs with an analog-to-digital converter is provided. First, the analog signal is converted to a high-frequency datastream with a delta-sigma modulator. A plurality of low-frequency datastreams are then generated by periodically extracting the samples of the high-frequency datastream, wherein consecutively extracted samples of the high-frequency datastream are scattered to different low-frequency datastreams. The low-frequency datastreams have the same sampling rate, and the phases of the corresponding samples of the low-frequency datastreams are different from each other.

REFERENCES:
patent: 6307903 (2001-10-01), Harris et al.
patent: 6546044 (2003-04-01), Dent
patent: 6813320 (2004-11-01), Claxton et al.
E Roza et al., “A DLL-Based Poly-phase Sampler for a Slgma Delta ADC”, pp. 106-111, date is unknown.
Roza, “Poly-Phase Sigma-Delta Modulation”, IEEE Transactions on Circuits and SYstems II: Analog and digital signal Processing), vol. 44, No. 11, Nov. 1997, pp. 915-923.

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