Delta-sigma analog-to-digital converter with overload dependent

Details Delta-sigma analog-to-digital converter with overload dependent Delta-sigma analog-to-digital converter with overload dependent

1992-04-03

1993-09-28

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Differential encoder and/or decoder

H03M 300

Patent

active

052489728

ABSTRACT:
The invention relates to a method and an arrangement for stabilizing a high-order sigma-delta modulator comprising at least two integrator stages and a quantizing means. The first, the first two or the first three integrator stages of the high-order modulator form a low-order modulator which is stable at all input signal values. The arrangement comprises a means for resetting the integrator stages following the low-order modulator when the stable operation range of the high-order modulator is exceeded. For an MF modulator the arrangement further comprises a coupling means for decoupling the output of the last integrator of the high-order modulator from the quantizing means and for coupling the output of said low-order modulator to the quantizing means simultaneously with the resetting.

REFERENCES:
patent: 4509037 (1985-04-01), Harris
patent: 5012244 (1991-04-01), Welland et al.

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