Title :
Multirate single-bit ΣΔ modulators
Author :
Colodro, Francisco ; Torralba, Antonio
Author_Institution :
Dept. de Ingenieria Electron., Univ. de Sevilla, Spain
fDate :
9/1/2002 12:00:00 AM
Abstract :
It has been shown that a multibit ΣΔ modulator can be built replacing the multibit quantizer in the forward path by a single-bit one, operating at a higher frequency, by an increase in the oversampling ratio of the last integrators of the loop. An improved topology is proposed here which obtains similar performances with single-bit feedback, overcoming drawbacks inherent to high resolution digital to analog converters.
Keywords :
circuit feedback; low-power electronics; modulators; sigma-delta modulation; ADC; analog-to-digital conversion; digital to analog converters; high resolution DACs; integrators; multirate single-bit ΣΔ modulators; oversampling ratio; sigma-delta modulator; single-bit feedback; Circuit noise; Delta modulation; Digital signal processing; Noise cancellation; Output feedback; Quantization; Transfer functions;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
DOI :
10.1109/TCSII.2002.807266
