A band-selective low-noise amplifier using an improved tunable active inductor for 3–5 GHz UWB receivers

Jaemin Shim, Jichai Jeong

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)

    Abstract

    We propose a three stage 3–5 GHz band-selective ultra-wideband low noise amplifier (LNA). A capacitor cross-coupled gm-boosting broadband input stage is adopted for input matching and high gain, and also improves the noise figure (NF) and reduces current consumption. The noise performance of the LNA is improved significantly using a noise cancelation stage. A band-selective stage using a proposed tunable active inductor controls input and output matching simultaneously using one output stage tuning circuit. The key aspect of the proposed active inductor is reduced interference, noise, and complexity problems encountered with conventional wide input-tunable output and input tuning architectures. We use a variable capacitor to further improve noise performance, the quality factor, and inductance of the active inductor and to provide a wide frequency tuning range. The simulation results show gains of 12.7, 13.3, and 13.3 dB, and NF values of 3.2, 3.4, and 3.7 dB at the 3.432, 3.960, and 4.488 GHz frequency bands, respectively. The proposed band-selective LNA consumes 8.4 mW from a 1.8-V power supply.

    Original languageEnglish
    Pages (from-to)78-83
    Number of pages6
    JournalMicroelectronics Journal
    Volume65
    DOIs
    Publication statusPublished - 2017 Jul

    Bibliographical note

    Funding Information:
    This work was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology under Grant 2015R1D1A1A01056746. The CAD tool used in our simulations was supported by IDEC (IC Design Education Center).

    Publisher Copyright:
    © 2017 Elsevier Ltd

    Keywords

    • Active inductor
    • Band-selective
    • Capacitor cross-coupling
    • Low noise amplifier
    • Noise canceling
    • UWB

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Atomic and Molecular Physics, and Optics
    • Condensed Matter Physics
    • Surfaces, Coatings and Films
    • Electrical and Electronic Engineering

    Fingerprint

    Dive into the research topics of 'A band-selective low-noise amplifier using an improved tunable active inductor for 3–5 GHz UWB receivers'. Together they form a unique fingerprint.

    Cite this