Analog to digital converter with low out of band peaking

Details Analog to digital converter with low out of band peaking Analog to digital converter with low out of band peaking

2011-04-19

2011-04-19

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

C341S155000

Reexamination Certificate

active

07928878

ABSTRACT:
An analog to digital converter includes a delta sigma modulator with a modified distributed feed-forward (DFF) topology. The modulator includes low pass filter circuitry that provides a first path to a first integrator and a second, feed-forward path to a second integrator that significantly reduce the out of band signal transfer function (STF) peaking of the modulator.

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Yaghini et al., “A 43mW CT Complex ΔΣ ADC with 23 MHz of Signal Bandwidth and 68.8dB SNDR” 2005 IEEE International Solid-State Circuits Conference. 07803-8904-2/05, 2005 IEEE.
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Yan et al. A Continuous-Time ΔΣ Modulator with 88dB Dynamic Range and 1.1MHz Signal Bandwidth. 2003 IEEE International Sold-State Circuits Conference, 0-7803-7707-9/03, 2003 IEEE.

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