• DocumentCode
    1618592
  • Title

    A 975-to-1960MHz fast-locking fractional-N synthesizer with adaptive bandwidth control and 4/4.5 prescaler for digital TV tuners

  • Author

    Lei Lu ; Zhichao Gong ; Youchun Liao ; Hao Min ; Zhangwen Tang

  • Author_Institution
    Fudan Univ., Shanghai
  • fYear
    2009
  • Firstpage
    396
  • Abstract
    This paper presents a wideband fractional-N synthesizer whose loop bandwidth is controlled adaptively. A fast automatic frequency-control (AFC) technique which selects the subband of the VCO is proposed to reduce the residual fractional error to 1/16 of the reference frequency fref. A new 4/4.5 prescaler is adopted to lower the quantization noise by reducing the quantization step size to 0.5.
  • Keywords
    UHF oscillators; automatic frequency control; circuit tuning; digital television; frequency synthesizers; prescalers; voltage-controlled oscillators; VCO subband; adaptive bandwidth control; automatic frequency-control technique; digital TV tuner; fast-locking fractional-N synthesizer; frequency 975 MHz to 1960 MHz; quantization noise; Adaptive control; Automatic control; Bandwidth; Digital TV; Frequency; Programmable control; Quantization; Synthesizers; Tuners; Wideband;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Solid-State Circuits Conference - Digest of Technical Papers, 2009. ISSCC 2009. IEEE International
  • Conference_Location
    San Francisco, CA
  • Print_ISBN
    978-1-4244-3458-9
  • Type

    conf

  • DOI
    10.1109/ISSCC.2009.4977475
  • Filename
    4977475
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1618592