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This paper presents a novel combination of two fully integrated phase-locked loops (PLLs) to control the oscillation frequency and modulation frequency of a switched injection-locked oscillator (SILO). The SILO is used as an active reflector transponder in a frequency-modulated continuous wave (FMCW) radar system. A fractional-N PLL (RF-PLL) with a tri-state phase-frequency detector (TSPFD) sets the...
This paper presents a fully integrated active backscatter transponder for the use in a FMCW radar system for localization of passengers in sea in case of a ship sinking emergency. The active reflector tag is based on a cross-coupled oscillator circuit topology operating as a switched injection-locked oscillator (SILO). The circuit was implemented in a 180nm BiCMOS technology. Measurements resulted...
This paper presents the design and characterization of a fully-differential intermediate frequency (IF) filter based on an operational transconductance amplifier (OTA) with 6th order Butterworth bandpass characteristic. The designed 2-stage BiCMOS OTA can be treated as an operational amplifier (OPAmp) together with its output resistance. The combination exhibits an open-loop voltage gain of 75 dB...
This work presents a detailed study for the logic of multi modulus frequency dividers (MMDs) with multiple modulus extensions. These MMDs have higher power efficiency compared to conventional pulse swallow dividers. In integer-N phase locked loops (PLLs), these MMDs are fully functional over their entire division range. In fractional-N PLLs however, certain division ratios cause the PLL to lose lock...
In this publication, a fully integrated active backscatter transponder for the positioning and fast rescue of passengers from sea in case of a ship sinking emergency is presented. The active reflector tag is applied in a frequency modulated continuous wave (FMCW) radar and to the authors knowledge is for the first time ever reported based on a Colpitts oscillator topology in common-base configuration...
In this paper, a fully integrated active reflector transponder for the localization and quick evacuation of passengers in the sea in case that passengers are overboard is presented. The backscatter tag is based on a cross-coupled oscillator topology using the switched injection-locked oscillator (SILO) principle and is implemented in a frequency modulated continuous wave (FMCW) radar. Furthermore,...
In this paper, a fully integrated active backscatter transponder based on the switched injection-locked oscillator (SILO) principle for frequency modulated continuous wave (FMCW) radar applications is presented. Furthermore, a novel theory to model the phase sampling behaviour of a SILO, accounting for noisy injection signals, is derived. The presented backscatter tag operates at 34.5 GHz and reaches...
Virtualization technology has enabled applications to be decoupled from the underlying hardware providing the benefits of portability, better control over execution environment and isolation. It has been widely adopted in scientific grids and commercial clouds. Since virtualization, despite its benefits incurs a performance penalty, which could be significant for systems dealing with uncertainty such...
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