Title :
A Stable 4th-Order Delta-Sigma Modulator with an FIR predictor
Author :
Okamoto, Tatsuaki ; Maruyama, Yuichi ; Yukawa, Akira
Author_Institution :
Syst. Micro LSI Dept., NEC Corp., Kawasaki, Japan
Abstract :
A novel approach for a stable high-order delta-sigma modulator is presented. The modulator provides 16 bit resolution at 20kHz bandwidth using 4th-order noise shaping structure at an oversampling ratio of 64. The modulation loop is completely stabilized by an FIR prediction technique. The architecture inherently has less sensitivity to component mismatch. The total hardware is much the same as the noise shaping integrators.
Keywords :
FIR filters; delta-sigma modulation; FIR predictor; bandwidth 20 kHz; noise shaping integrators; oversampling ratio; sensitivity; stable 4th-order delta-sigma modulator; word length 16 bit; Bandwidth; Delta modulation; Feedback; Finite impulse response filter; Hardware; Large scale integration; National electric code; Noise level; Noise shaping; Stability;
Conference_Titel :
Solid-State Circuits Conference, 1992. ESSCIRC '92. Eighteenth European
Conference_Location :
Copenhagen
Print_ISBN :
87-984232-0-7
DOI :
10.1109/ESSCIRC.1992.5468428
