Method and apparatus for analog-to-digital conversion using...

Details Method and apparatus for analog-to-digital conversion using... Method and apparatus for analog-to-digital conversion using...

2011-05-24

2011-05-24

Mai, Lam T (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C375S326000

Reexamination Certificate

active

07948413

ABSTRACT:
Analog to digital conversion characterized in that the square wave (z(t)) obtained as a result of modulation in an asynchronous Sigma-Delta modulator (ASDM) is subjected to conversion by counting the periods (T0) of the reference clock (RG) during subsequent pulses of the square wave by means of the counting module (CTM), and then each word obtained representing the number of periods of the reference clock counted during each given pulse of the square wave is recorded and stored in the intermediate buffer (TBUF). The duration of the serial transmission of the digital word obtained as a result of counting the periods of the reference clock during previous pulse of the square wave is simultaneously controlled by the control module (CM), and as soon as this transmission is completed, the content of the intermediate buffer (TBUF) is transferred to the transmitting buffer (TDR) of the apparatus.

REFERENCES:
patent: 7403144 (2008-07-01), Cruz-Albrecht et al.
patent: 7633420 (2009-12-01), DuPuis
patent: 7777656 (2010-08-01), Hernandez et al.
patent: 2005/0190865 (2005-09-01), Lazar et al.

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