Now showing items 1-6 of 6

  • A comparison between grounded and floating shield inductors for mmW VCOs 

    González Jiménez, José Luis; Aragonès Cervera, Xavier; Molina Garcia, Marc Manel; Martineau, Baudouin; Belot, Didier (2010)
    Conference report
    Open Access
    A floating-shield inductor implemented in CMOS process is compared with a conventional patterned ground shield inductor for the implementation of a LC voltage controlled oscillator (VCO) operating at mmW frequencies. ...
  • Design of a 2.5-GHZ QVCO robust against high frequency substrate noise 

    Molina Garcia, Marc Manel; Gómez Salinas, Dídac; Aragonès Cervera, Xavier; Mateo Peña, Diego; González Jiménez, José Luis (2011-07)
    Article
    Restricted access - publisher's policy
    This work presents the design procedure followed to obtain a low-power voltage-controlled oscillator (VCO) robust against high-frequency substrate noise, using as a demonstrator a 2.5 GHz VCO with quadrature outputs (QVCO) ...
  • Design-oriented analysis of quantization-induced limit cycles in a multiple-sampled digitally controlled buck converter 

    Bradley, Mark; Alarcón Cot, Eduardo José; Feely, Orla (2014-04-01)
    Article
    Restricted access - publisher's policy
    Digital control of switching power converters is an area which has seen increased attention in recent years. However, quantization in the feedback loop from the analog-to-digital (A/D) converter and the digital pulse width ...
  • Effect of high frequency substrate noise on LC-VCOs 

    Molina Garcia, Marc Manel; Aragonès Cervera, Xavier; Mateo Peña, Diego; González Jiménez, José Luis (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
    Conference report
    Open Access
    This paper presents an experimental analysis of the performance degradation of an LC-Voltage Controlled Oscillator (LC-VCO) produced by high frequency noise present in the substrate. The spurs observed are shown to be ...
  • Performance of the load-in-the-loop single op-amp voltage controlled current source from the op-amp parameters 

    Macías Lloret, Mario; Seoane, F.; Bragós Bardia, Ramon (2010)
    Conference report
    Open Access
    In recent years, Electrical Bioimpedance (EBI) methods have gained importance. These methods are often based on obtaining impedance spectrum in the range of β-dispersion, i.e. from a few kHz up to some MHz. To measure ...
  • Phase noise degradation of LC-tank VCOs due to substrate noise and package coupling 

    Méndez, M A; Mateo Peña, Diego; Aragonès Cervera, Xavier; González Jiménez, José Luis (IEEE, 2005)
    Conference report
    Open Access
    The present work addresses the investigation of phase noise degradation of LC-tank VCOs due to realistic digitally originated substrate noise. The dominant mechanisms by which this noise is coupled to the output of the ...