Title :
Reducing non-idealities on switched-current sigma-delta modulators
Author :
Calderón, R. Rodríguez ; Corte, J. Santana ; Ibarra, F. Andoval
Author_Institution :
CINVESTAV, Unidad Guadalajara, Mexico
fDate :
6/24/1905 12:00:00 AM
Abstract :
Oversampling ΣΔ A/D and D/A converters based on switched current (SI) cells are an option that offers great advantages when manufactured with digital circuit processes. However, SI suffers from non-idealities that limit the performance of oversampling ΣΔ modulators. This paper presents a conventional second order ΣΔ modulator using the SI technique with a compensation scheme that reduces non-idealities of the integrators improving the performance of the modulator for audio applications.
Keywords :
audio signal processing; integrating circuits; sigma-delta modulation; signal sampling; switched current circuits; SI cells; SI nonidealities; SI technique; compensation scheme; digital circuit processes; integrator nonidealities; modulator audio applications; modulator performance; nonidealities reduction; oversampling ΣΔ A/D converters; oversampling ΣΔ D/A converters; second order ΣΔ modulator; switched current cells; switched-current sigma-delta modulators; Capacitors; Clocks; Delta-sigma modulation; Energy consumption; Equations; Frequency; Sampling methods; Switches; Switching converters; Voltage;
Conference_Titel :
Devices, Circuits and Systems, 2002. Proceedings of the Fourth IEEE International Caracas Conference on
Print_ISBN :
0-7803-7380-4
DOI :
10.1109/ICCDCS.2002.1004004
