A 6̃10-GHz ultra-wideband tunable lna

Yang Chaun Chen, Chien-Nan Kuo

    Research output: Contribution to journalConference articlepeer-review

    35 Scopus citations


    In this paper a CMOS low noise amplifier (LNA) is designed with tunable output over an ultra-wideband. The cascode configuration is employed in this circuit, with the inductive source degeneration (ISD) and a three-section bandpass Chebyshev filter to achieve broadband input impedance matching. A source follower acts as the buffer stage for broadband output impedance matching. Signal output is bandtunable over the frequency range from 6-GHz to 10-GHz. The circuit is fabricated in a standard 0.18um CMOS process. Circuit performance achieves maximum power gain, S21, of 11.6 dB, the input return loss, S11, better than 9 dB, and the best noise figure of 4.2dB. The circuit consumes power of 11.6mW.

    Original languageEnglish
    Article number1465781
    Pages (from-to)5099-5102
    Number of pages4
    JournalProceedings - IEEE International Symposium on Circuits and Systems
    StatePublished - 1 Dec 2005
    EventIEEE International Symposium on Circuits and Systems 2005, ISCAS 2005 - Kobe, Japan
    Duration: 23 May 200526 May 2005


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