Record number :
100053
Title of article :
On the parasitic-sensitivity of switched-capacitor summing-integrator structures for (sigma)(delta) modulators
Author/Authors :
S.M.R.، Hasan, نويسنده , , S.J.، Ashtiani, نويسنده , , O.، Shoaei, نويسنده , , A.، Jannesari, نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Pages :
-633
From page :
634
To page :
0
Abstract :
This brief focuses on the comparative analysis of the parasitic sensitivity of different switched-capacitor summing-integrator structures employed in (sigma)(delta) modulators. One summing-integrator structure with cross-coupled switches is found to be parasitic sensitive, whereas that without cross-coupled switches is found to be parasitic insensitive. The effect of parasiticsensitive and parasitic-insensitive summing integrators on the performance of a second-order (sigma)(delta) modulator is reported. Circuit simulations indicate a degradation of the signal-to-noise-plus-distortion ratio (SNDR) of the modulator from 89 dB to as low as 51 dB in the presence of certain parasitic capacitances when the parasitic sensitive summing integrator is used. This is primarily due to a prominent second-harmonic component in the quantizer output. Simulations using the parasitic-insensitive summing-integrator structure are found to cause no prominent harmonic distortion and, hence, no degradation of the SNDR in the presence of any parasitic capacitances.
Keywords :
Abdominal obesity , Food patterns , Prospective study , waist circumference
Journal title :
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II:ANALOG AND DIGITAL SIGNAL PROCESSING
Journal title :
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II:ANALOG AND DIGITAL SIGNAL PROCESSING
Serial Year :
2003
Link To Document :
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