A 0.1-to-1.2GHz tunable 6th-order N-path channel-select filter with 0.6dB passband ripple and +7dBm blocker tolerance

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    32 Citations (Scopus)
    42 Downloads (Pure)

    Abstract

    Radio receivers should be robust to large out-of-band blockers with small degradation in their sensitivity. N-path mixers can be used as mixer-first receivers [1] with good linearity and RF filtering [2]. However, 1/f noise calls for large active device sizes for IF circuits and high power consumption. The 1/f noise issue can be relaxed by having RF gain. However, to avoid desensitization by large out-of-band blockers, a bandpass filter (BPF) with sharp cut-off frequency is required in front of the RF amplifiers. gm-C BPFs suffer from tight tradeoffs among DR, power consumption, Q and fc. Also, on-chip Q-enhanced LC BPFs [3] are not suitable due to low DR, large area and non-tunability. Therefore, bulky and non-tunable SAW filters are used. N-path BPFs offer high Q while their center frequency is tuned by the clock frequency [2]. Compared to gm-C filters, this technique decouples the required Q from the DR. The 4-path filter in [4] has only 2nd-order filtering and limited rejection. The order and rejection of N-path BPFs can be increased by cascading [5], but this renders a “round‿ passband shape. The 4th-order 4-path BPF in [6] has a “flat‿ passband shape and high rejection but a high NF. This work solves the noise issue of [6] while achieving the same out-of-band linearity and adding 25dB of voltage gain to relax the noise requirement of the subsequent stages.
    Original languageEnglish
    Title of host publicationIEEE International Solid-State Circuits Conference Digest of Technical Papers, ISSCC 2013
    Place of PublicationPiscataway
    PublisherIEEE
    Pages172-173
    Number of pages2
    ISBN (Print)978-1-4673-4515-6
    DOIs
    Publication statusPublished - 19 Feb 2013
    EventIEEE International Solid-State Circuits Conference, ISSCC 2013 - San Francisco, United States
    Duration: 17 Feb 201321 Feb 2013

    Publication series

    Name
    PublisherIEEE Press
    ISSN (Print)0193-6530

    Conference

    ConferenceIEEE International Solid-State Circuits Conference, ISSCC 2013
    Abbreviated titleISSCC
    CountryUnited States
    CitySan Francisco
    Period17/02/1321/02/13

    Fingerprint

    Bandpass filters
    Electric power utilization
    Radio receivers
    Cutoff frequency
    Clocks
    Degradation
    Networks (circuits)
    Electric potential

    Keywords

    • EWI-23441
    • METIS-297700
    • IR-86301

    Cite this

    Darvishi, M., van der Zee, R. A. R., & Nauta, B. (2013). A 0.1-to-1.2GHz tunable 6th-order N-path channel-select filter with 0.6dB passband ripple and +7dBm blocker tolerance. In IEEE International Solid-State Circuits Conference Digest of Technical Papers, ISSCC 2013 (pp. 172-173). Piscataway: IEEE. https://doi.org/10.1109/ISSCC.2013.6487686
    Darvishi, M. ; van der Zee, Ronan A.R. ; Nauta, Bram. / A 0.1-to-1.2GHz tunable 6th-order N-path channel-select filter with 0.6dB passband ripple and +7dBm blocker tolerance. IEEE International Solid-State Circuits Conference Digest of Technical Papers, ISSCC 2013. Piscataway : IEEE, 2013. pp. 172-173
    @inproceedings{f46aed68f6204971bd26fe0ef091ca3a,
    title = "A 0.1-to-1.2GHz tunable 6th-order N-path channel-select filter with 0.6dB passband ripple and +7dBm blocker tolerance",
    abstract = "Radio receivers should be robust to large out-of-band blockers with small degradation in their sensitivity. N-path mixers can be used as mixer-first receivers [1] with good linearity and RF filtering [2]. However, 1/f noise calls for large active device sizes for IF circuits and high power consumption. The 1/f noise issue can be relaxed by having RF gain. However, to avoid desensitization by large out-of-band blockers, a bandpass filter (BPF) with sharp cut-off frequency is required in front of the RF amplifiers. gm-C BPFs suffer from tight tradeoffs among DR, power consumption, Q and fc. Also, on-chip Q-enhanced LC BPFs [3] are not suitable due to low DR, large area and non-tunability. Therefore, bulky and non-tunable SAW filters are used. N-path BPFs offer high Q while their center frequency is tuned by the clock frequency [2]. Compared to gm-C filters, this technique decouples the required Q from the DR. The 4-path filter in [4] has only 2nd-order filtering and limited rejection. The order and rejection of N-path BPFs can be increased by cascading [5], but this renders a “round‿ passband shape. The 4th-order 4-path BPF in [6] has a “flat‿ passband shape and high rejection but a high NF. This work solves the noise issue of [6] while achieving the same out-of-band linearity and adding 25dB of voltage gain to relax the noise requirement of the subsequent stages.",
    keywords = "EWI-23441, METIS-297700, IR-86301",
    author = "M. Darvishi and {van der Zee}, {Ronan A.R.} and Bram Nauta",
    note = "eemcs-eprint-23441",
    year = "2013",
    month = "2",
    day = "19",
    doi = "10.1109/ISSCC.2013.6487686",
    language = "English",
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    Darvishi, M, van der Zee, RAR & Nauta, B 2013, A 0.1-to-1.2GHz tunable 6th-order N-path channel-select filter with 0.6dB passband ripple and +7dBm blocker tolerance. in IEEE International Solid-State Circuits Conference Digest of Technical Papers, ISSCC 2013. IEEE, Piscataway, pp. 172-173, IEEE International Solid-State Circuits Conference, ISSCC 2013, San Francisco, United States, 17/02/13. https://doi.org/10.1109/ISSCC.2013.6487686

    A 0.1-to-1.2GHz tunable 6th-order N-path channel-select filter with 0.6dB passband ripple and +7dBm blocker tolerance. / Darvishi, M.; van der Zee, Ronan A.R.; Nauta, Bram.

    IEEE International Solid-State Circuits Conference Digest of Technical Papers, ISSCC 2013. Piscataway : IEEE, 2013. p. 172-173.

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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    N2 - Radio receivers should be robust to large out-of-band blockers with small degradation in their sensitivity. N-path mixers can be used as mixer-first receivers [1] with good linearity and RF filtering [2]. However, 1/f noise calls for large active device sizes for IF circuits and high power consumption. The 1/f noise issue can be relaxed by having RF gain. However, to avoid desensitization by large out-of-band blockers, a bandpass filter (BPF) with sharp cut-off frequency is required in front of the RF amplifiers. gm-C BPFs suffer from tight tradeoffs among DR, power consumption, Q and fc. Also, on-chip Q-enhanced LC BPFs [3] are not suitable due to low DR, large area and non-tunability. Therefore, bulky and non-tunable SAW filters are used. N-path BPFs offer high Q while their center frequency is tuned by the clock frequency [2]. Compared to gm-C filters, this technique decouples the required Q from the DR. The 4-path filter in [4] has only 2nd-order filtering and limited rejection. The order and rejection of N-path BPFs can be increased by cascading [5], but this renders a “round‿ passband shape. The 4th-order 4-path BPF in [6] has a “flat‿ passband shape and high rejection but a high NF. This work solves the noise issue of [6] while achieving the same out-of-band linearity and adding 25dB of voltage gain to relax the noise requirement of the subsequent stages.

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    Darvishi M, van der Zee RAR, Nauta B. A 0.1-to-1.2GHz tunable 6th-order N-path channel-select filter with 0.6dB passband ripple and +7dBm blocker tolerance. In IEEE International Solid-State Circuits Conference Digest of Technical Papers, ISSCC 2013. Piscataway: IEEE. 2013. p. 172-173 https://doi.org/10.1109/ISSCC.2013.6487686