Title :
Double-loop sigma-delta modulation with DC input
Author :
He, Ning ; Kuhlmann, Federico ; Buzo, Andres
Author_Institution :
Grad. Sch. of Eng., Nat. Univ. of Mexico, Mexico City, Mexico
fDate :
4/1/1990 12:00:00 AM
Abstract :
A discrete-time model having a two-bit (2-b) quantizer is analyzed exactly, and an analytical expression for the quantizer noise sequence is found. Rigorous answers are then provided to two fundamental questions for a double-loop sigma-delta modulation system with DC input: (1) What is the long-term statistical behavior of the internal quantizer noise? (2) How does the asymptotic mean square sigma-delta quantization error vary as a function of the oversampling ratio?
Keywords :
analogue-digital conversion; coding errors; delta modulation; discrete time systems; noise; ADC; DC input; asymptotic mean square; discrete-time model; double-loop sigma-delta modulation system; oversampling ratio; quantizer noise sequence; sigma-delta quantization error; Analog-digital conversion; Bandwidth; Circuit noise; Decoding; Delta-sigma modulation; Filters; Linear systems; Power system modeling; Quantization; Very large scale integration;
Journal_Title :
Communications, IEEE Transactions on
