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A CMOS fully-differential bandpass ΣΔ modulator using switched-current circuits

AuthorsRosa, José M. de la ; Medeiro, Fernando ; Pérez-Verdú, Belén ; Rodríguez-Vázquez, Ángel
KeywordsSwitched-current circuits
Bandpass ΣΔ modulators
Issue DateAug-1995
PublisherInstitute of Electrical and Electronics Engineers
CitationProceedings of the 38th Midwest Symposium on Circuits and Systems 2: 744-747 (1995)
AbstractThis paper presents a fourth-order bandpass sigma-delta modulator that has been designed using fully-differential switched-current circuits in a 0.8μm CMOS technology. The modulator prototype has been obtained by applying a lowpass to bandpass transformation to a second-order lowpass ΣΔ modulator. Specifications are SNR 60dB@2.5Mhz±15Khz, for a clock frequency of 1OMhz. Preliminary results from the fabricated prototype obtains the correct noise shaping up to 2.5Mhz clock frequency.
DescriptionComunicación presentada al "38 th MWSCAS" celebrado en Rio de janeiro del 13 al 16 de Agosto de 1995.
Publisher version (URL)http://dx.doi.org/10.1109/MWSCAS.1995.510196
Appears in Collections:(IMSE-CNM) Libros y partes de libros
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