Title :
Stability Analysis Of A Third-Order Digital Sigma-Delta Modulator
Author :
Sadik, Amin Z. ; Hussain, Zahir M. ; Yu, Xinghuo
Author_Institution :
Sch. of Electr. & Comput. Eng., RMIT Univ., Melbourne
fDate :
Aug. 31 2006-Sept. 1 2006
Abstract :
The stability of a high-order sigma-delta modulator has been addressed under dc input. A new approach for stability analysis is proposed. A nonlinear circle map is suggested to model the dynamics of the modulator. The stability problem is handled using an analogy between the dynamics of the sigma-delta modulator and the sinusoidal digital phase-locked loop (DPLL). An approximate fixed point solution is presented and stability criteria are derived
Keywords :
approximation theory; digital phase locked loops; modulators; sigma-delta modulation; stability criteria; DPLL; approximate fixed point solution; digital phase-locked loop; digital sigma-delta modulator; nonlinear circle map; stability analysis; Delta-sigma modulation; Difference equations; Digital modulation; Digital signal processing; Genetic expression; Phase locked loops; Phase modulation; Stability analysis; Stability criteria; Topology;
Conference_Titel :
Communications, 2006. APCC '06. Asia-Pacific Conference on
Conference_Location :
Busan
Print_ISBN :
1-4244-0573-4
Electronic_ISBN :
1-4244-0574-2
DOI :
10.1109/APCC.2006.255855
