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End date: 2009 × Start date: 2009 × Has files: Yes × Type: Article × Type: Text × WGL Institute: IHP ×

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    An X-Band low-power and low-phase-noise VCO using bondwire inductor
    (München : European Geopyhsical Union, 2009) Hu, K.; Herzel, F.; Scheytt, J.C.
    In this paper a low-power low-phase-noise voltage-controlled-oscillator (VCO) has been designed and, fabricated in 0.25 μm SiGe BiCMOS process. The resonator of the VCO is implemented with on-chip MIM capacitors and a single aluminum bondwire. A tail current filter is realized to suppress flicker noise up-conversion. The measured phase noise is −126.6 dBc/Hz at 1 MHz offset from a 7.8 GHz carrier. The figure of merit (FOM) of the VCO is −192.5 dBc/Hz and the VCO core consumes 4 mA from a 3.3 V power supply. To the best of our knowledge, this is the best FOM and the lowest phase noise for bondwire VCOs in the X-band. This VCO will be used for satellite communications.
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    GALS for Bursty Data Transfer based on Clock Coupling
    (Amsterdam : Elsevier, 2009) Krstić, M.; Fan, X.; Grass, E.; Gürkaynak, F.K.
    In this paper we introduce a novel burst-mode GALS technique. The goal of this technique is improving the performance of the GALS approach for systems with predominantly bursty data transfer. This new technique has been used to implement a GALS-based version of a hardware accelerator of a 60 GHz OFDM baseband processor. The simulation results show a significant performance improvement in comparison with a classical implementation of GALS using pausible clocking. © 2009 Elsevier B.V. All rights reserved.