Design of a SiGe BiCMOS canceller for low frequency noise reduction in direct conversion receivers

Michele Squartecchia, Tom Keinicke Johansen, Rasmus Schandorph Michaelsen

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    Abstract

    Direct-conversion receivers are increasingly employed in many applications, such as wireless communications and radars. Indeed, they represent an effective alternative to heterodyne receivers, as they allow a higher level of integration. However, performance limitations are imposed by the leakage of the local oscillator (LO) toward the RF port of the mixer (Figure 1(a)). This causes the LO self-mixing phenomenon, which is responsible of a significant DC offset at the output of the receiver (Figure 1(b)). In turn, this DC offset gives rise to a high level of low frequency noise affecting the signal recovery at baseband (R. S. Michaelsen et al., IEEE Microwave and Wireless Components Letters, Vol. 23 No. 2, 2013, pp. 66–68).
    Original languageEnglish
    Publication date2015
    Number of pages1
    DOIs
    Publication statusPublished - 2015
    Event1st URSI Atlantic Radio Science Conference - Gran Canaria, Spain
    Duration: 18 May 201522 May 2015

    Conference

    Conference1st URSI Atlantic Radio Science Conference
    Country/TerritorySpain
    CityGran Canaria
    Period18/05/201522/05/2015

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