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Double-loop sigma-delta modulation with DC input

1990; IEEE Communications Society; Volume: 38; Issue: 4 Linguagem: Inglês

10.1109/26.52660

1558-0857

Ning He, F. Kuhlmann, A. Buzo,

Numerical Methods and Algorithms

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?. >