Title :
Exact analysis of second order bandpass delta-sigma modulator with sinusoidal inputs
Author :
Chang, Tsung-Yuan ; Bibyk, Steven B.
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
The nonlinear recursive difference equations of second order bandpass delta-sigma modulator with sinusoidal inputs are solved. The results indicate that quantization error is neither uniformly distributed nor white. The autocorrelation of quantization error is symmetric but does not vanish as correlation index increased. The study of crosscorrelation between quantization error and sinusoidal input shows it indeed exists which also contradicts the assumption of linear model
Keywords :
correlation methods; difference equations; nonlinear equations; quantisation (signal); sigma-delta modulation; autocorrelation; correlation index; crosscorrelation; nonlinear recursive difference equations; quantization error; second order bandpass delta-sigma modulator; sinusoidal inputs; Analog-digital conversion; Autocorrelation; Band pass filters; Baseband; Delta modulation; Difference equations; Feedback loop; Quantization; Signal processing; Signal resolution;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780736
