Title: Synchronization properties of delay-coupled electronic oscillators: effects of heterogeneity

Speaker: Dr. Nirmal Punetha, MPIPKS, Dresden

Abstract: In modern electronics the coordination in time of complex systems and processes is necessary for a defined system behavior, efficient operation and reliable parallel information processing. The production process of CMOS integrated electronic circuitry inherently leads to large heterogeneities on the level of the electronic components. For electronic clocks composed of phase-detecter, loop-filter and voltage controlled oscillator, for example, that means heterogeneity in the intrinsic frequencies, in transmission line and feedback delays, as well as in the cut-off frequencies of filters. In this talk, I will discuss the effects of such heterogeneity on the collective behavior of mutually delay-coupled electronic oscillators, so called phase-locked loops. We present different scenarios of collective dynamics and discuss how the detuning of intrinsic frequencies and differences in the delay times associated to signal transmission lines, feedback as well as filtering process change the synchronized states and their stability in such systems.