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Simulation and improvement of two digital adaptive frequency calibration techniques for fast locking wide-band frequency synthesizers

Saadat, M. R ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.1109/DTIS.2007.4449507
  3. Publisher: 2007
  4. Abstract:
  5. Fast locking PLL-based wide-band frequency synthesizers used in high performance RF transceivers often require multi-band voltage controlled oscillator (VCO). These types of frequency synthesizers employ both discrete and continuous tuning mechanisms to satisfy wide frequency range and low VCO tuning gain simultaneously. To facilitate discrete tuning mechanisms, an auxiliary digital loop is required in order to select proper band of VCO. This digital loop is called adaptive frequency calibration (AFC). In this paper two methods of previous AFC architectures are discussed and improved to gain the minimum possible lock time of PLL. Then, these two methods are simulated and implemented over FPGA using Xilinx System Generator. Finally, the results are compared with previous works. © 2007 IEEE
  6. Keywords:
  7. Acoustic fields ; Calibration ; Digital arithmetic ; Frequency synthesizers ; Integrated control ; Mechanisms ; Nanostructured materials ; Nanotechnology ; Phase locked loops ; Signal generators ; Technology ; Variable frequency oscillators ; Adaptive frequency ; Continuous tuning ; Design and technology ; Digital logic quadricorrelator ; Frequency synthesizer ; Integrated Systems ; International conferences ; Lock time ; Multi bands ; Nanoscale era ; RF transceivers ; Tuning gain ; Voltage controlled oscillators ; Voltage-controlled oscillator ; Wide band frequencies ; Wide frequency range ; Xilinx system generator ; Tuning
  8. Source: 2007 International Conference on Design and Technology of Integrated Systems in Nanoscale Era, DTIS 2007, Rabat, 2 September 2007 through 5 September 2007 ; February , 2007 , Pages 136-141 ; 1424412781 (ISBN); 9781424412785 (ISBN)
  9. URL: https://ieeexplore.ieee.org/abstract/document/4449507