A 3rd Order Low Power Switched Current Sigma-Delta Modulator

Ivan Herald Holger Jørgensen, Gudmundur Bogason

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    This paper presents a 3rd order switched current Sigma-Delta modulator. The Sigma-Delta modulator operates at a sampling rate of 600kHz and the signal band is 5.5kHz, i.e. an oversampling factor of 54.5 is used. Multiple input signals are used to reduce the internal signal swings which results in reduced power consumption. The shaping of the noise from the 2nd and 3rd integrator is used to allow the noise power from these integrators to be increased to further save power. The total power consumption is approximately 2.5mW with a supply voltage of 3.3V. The maximum SNR is approximately 74.5dB.
    Original languageEnglish
    Title of host publicationProc. 14th NORCHIP Conference
    Place of PublicationCopenhagen
    Publication date1996
    Publication statusPublished - 1996
    Event14th NORCHIP Conference - Helsinki, Finland
    Duration: 4 Nov 19965 Nov 1996


    Conference14th NORCHIP Conference

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