Systems and methods for digital signal synthesis with variable sample rate DAC

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United States of America

PATENT NO 12231145
SERIAL NO

18174093

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Abstract

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Systems and methods for digital signal synthesis with variable sample rate digital-to-analog converters (DACs) in accordance with various embodiments of the invention are described. One embodiment includes a digital frequency generator that includes a direct digital frequency synthesizer (DDFS); a digital-to-analog converter (DAC); a frequency/phase estimation circuit; a stable reference clock (REF CLK); a variable frequency sample clock; a frequency control word (FCW); where the DAC is sampled by the variable frequency sample clock; where the DDFS is clocked by the variable frequency sample clock; where the frequency/phase estimation circuit receives as inputs the stable REF CLK and the variable frequency sample clock and estimates a FCW frequency error and adjusts the FCW to the DDFS; where the DDFS receives the FCW and outputs a digital sine codeword at the variable frequency sample clock to the DAC, where the FCW to the DDFS is continuously adjusted to track the variable frequency sample clock.

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Patent Owner(s)

  • MIXED-SIGNAL DEVICES INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Madisetti, Avanindra Coto de Caza, US 34 789
Yu, Tommy Orange, US 55 449

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