Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate
2011-07-19
2011-07-19
Lauture, Joseph (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Differential encoder and/or decoder
C341S155000
Reexamination Certificate
active
07982648
ABSTRACT:
A dynamic element matching sigma-delta modulator includes an adder to receive an analog input signal and a feedback signal to generate an error signal; a loop filter to generate a filtered signal according to the error signal; a quantizer to change the filtered signal into a quantized output signal; a digital/analog converter (DAC) having a plurality of digital/analog elements to generate the feedback signal corresponding to the quantized output signal; and a dynamic element matching device to receive the quantized output signal to accordingly set an element of the DAC to be a previous non-participant element and the other elements to be previous participant elements, and reselects participant elements according to the quantized output signal and the previous participant elements for further generating the feedback signal corresponding to the quantized output signal.
REFERENCES:
patent: 5221926 (1993-06-01), Jackson
patent: 6304608 (2001-10-01), Chen et al.
patent: 6753799 (2004-06-01), Colonna et al.
patent: 7183955 (2007-02-01), Shih
Bacon & Thomas PLLC
Lauture Joseph
Sunplus Technology Co. Ltd.
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