Switched current delta-sigma modulator

Details Switched current delta-sigma modulator Switched current delta-sigma modulator

H - Electricity

03

M

H03M 3/02 (2006.01)

Patent

CA 2253747

A noise-limiting, switched current delta-sigma modulator for use in, for example, an oversampling analog-to-digital converter. The modulator includes a first integrator having a relatively large bias current and one or more second integrators having relatively small bias currents. The modulator according to the present invention reduces power consumption and chip area.

La présente invention concerne un modulateur delta-sigma à courant commuté, limiteur de bruit, et convenant particulièrement pour un numériseur à suréchantillonnage. Ce modulateur comporte un premier intégrateur caractérisé par un courant de polarisation relativement élevé et un ou plusieurs seconds intégrateurs caractérisés par un courant de polarisation relativement faible. Le modulateur de l'invention réduit la consommation électrique et la taille du microcircuit.

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