Title :
Harmonic distortion in fully-differential switched-current sigma-delta modulators
Author :
de la Rosa, J.M. ; Pérez-Verdú, B. ; Medeiro, F. ; Río, R. Del ; Rodríguez-Vázquez, A.
Author_Institution :
Inst. de Microelectron. de Sevilla, IMSE-CNM, Spain
Abstract :
This paper presents a systematic analysis of the harmonic distortion in ΣΔ modulators (ΣΔMs) implemented with fully-differential switched-current (SI) circuits. Closed form expressions are derived for the third-order harmonic distortion in lowpass and bandpass ΣΔMs. For the latter, the third-order intermodulation distortion is also deduced. Time domain behavioral simulations validate our approach
Keywords :
harmonic distortion; intermodulation distortion; modulators; sigma-delta modulation; switched current circuits; time-domain analysis; SI ΣΔ modulators; SI circuits; bandpass ΣΔ modulator; fully-differential type; harmonic distortion analysis; intermodulation distortion; lowpass ΣΔ modulator; switched-current sigma-delta modulators; third-order IMD; third-order harmonic distortion; time domain behavioral simulations; CMOS technology; Cams; Delta-sigma modulation; Harmonic analysis; Harmonic distortion; Intermodulation distortion; Sampling methods; Switches; Switching circuits; Transconductance;
Conference_Titel :
Design of Mixed-Mode Integrated Circuits and Applications, 1999. Third International Workshop on
Conference_Location :
Puerto Vallarta
Print_ISBN :
0-7803-5588-1
DOI :
10.1109/MMICA.1999.833617
