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

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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
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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",
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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.

AB - 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.

KW - EWI-23441

KW - METIS-297700

KW - IR-86301

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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