Record number :
100042
Title of article :
Sigma-delta modulator with spectrally shaped feedback
Author/Authors :
O.، Oliaei, نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Pages :
-517
From page :
518
To page :
0
Abstract :
This paper explores the use of finite-impulse response (FIR) filters in the feedback path of a low-pass sigma-delta modulator in order to combat some nonideal effects encountered in an analog implementation. In this approach, the filter corresponding to the first integrator is a lowpass filter which smoothes out the feedback waveform by attenuating the high-frequency quantization noise. This lowpass filtering decreases the power consumption of a switched-capacitor implementation and alternatively reduces the sensitivity to clock jitter in a continuous-time structure. A design methodology ensuring the stability of the system is presented. Theoretical analysis and simulations show that the FIR filters allow a continuous-time single-bit modulator to achieve the jitter performance of a comparable multibit modulator.
Keywords :
Abdominal obesity , Food patterns , waist circumference , Prospective study
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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