Analysis and Design of Digitally Controllable Oscillators

  • Research field:mmW Circuit Design, RFIC Design
  • Type:Master Thesis
  • Time:anytime
  • Supervisor:

    M.Sc. Matthias Möck

  • There is growing interest in oscillators with a wide frequency tuning range, e.g. for high data-rate communications or imaging applications with high resolution. In classic Voltage-Controlled Oscillators (VCOs), wide tuning ranges can be achieved through analog tuning of large-sized varactors, but at the cost of an increased phase noise due to a high tuning sensitivity (VCO gain). One approach to reduce the VCO gain is to employ a bank of binary-weighted capacitors with digital controllability for coarse tuning of the frequency, while a single small-sized varactor can be used for continuous fine tuning. 


    The aim of this thesis is to design a digitally controllable oscillator for millimeter-wave applications in a SiGe BiCMOS technology. The task includes schematic simulations and the layout design.



    • Theoretical analysis will be focused on digital frequency tuning

    • Design and Simulation of the circuits in a state-of-the-art SiGe BiCMOS technology with industry-standard RFIC Design Tools (ADS, Cadence Virtuoso)


    Requirements: Good understanding of circuits (e.g. ES, RFE or RFICS)


    Language: German or English


    German Description as .pdf

    English Description as .pdf