Current mode sigma-delta modulator

Details Current mode sigma-delta modulator Current mode sigma-delta modulator

2006-12-21

2008-10-14

Mai, Lam T (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S155000

Reexamination Certificate

active

07436338

ABSTRACT:
Exemplary sigma-delta modulators include a summing block configured to receive an input signal, a noise shaping unit configured to process an output signal of the summing block, a quantizer configured to quantize an output signal of the noise shaping unit, and a current-mode digital-to-analog converter (“DAC”) configured to convert an output of the quantizer into an analog signal and input the analog signal into the summing block in a closed loop feedback manner.

REFERENCES:
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patent: 6426714 (2002-07-01), Ruha et al.
patent: 6473019 (2002-10-01), Ruha et al.
patent: 6778119 (2004-08-01), May
patent: 7057540 (2006-06-01), Muhammad et al.
patent: 7081845 (2006-07-01), Hales et al.
patent: 7098828 (2006-08-01), San et al.
patent: 2003/0080888 (2003-05-01), Muhammad et al.
patent: 2005/0285766 (2005-12-01), San et al.

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