Generator with controlling spectrum of
noise
Erast Kal'yanov
Institute of Radio
Engineering and Electronics of the Russian Academy of Sciences, Moscow,
Russia
The oscillation processes is analyzed numerically for generator containing cloused in ring two cascade of amplifiers, second-order filter and directed leadout. In this case every cascade of amplifier containing delay line, first-order filter and nonlinear element with controlling nonlinearity.
It is shown that for a small Q factor of the second-order filter (approximate equal a one) and also for absence of this filter the creation of wide-range chaotic oscillations without limitation of amplitude rejections wich usually arise in exit amplifier is possible for corresponding choise of regimes of amplifiers. In contrast to the expected effect transition to chaos wich an increase of parameters of nonlinearity of amplifiers the opposite effect is possible - destochastisation of the oscillations.
With an increase in Q factor of the second-order filter a transition to chaos in the regions between zones of generation occurs. The synchronous and asynchronous interractions of two and more modes in this regions occurs that depend from value of parameters of amplifiers and of filter tuning. The chaotisation of oscillations as fall of synchronous interractions with bifurcations of doubling or tripling of synchronous oscillation period on the combination frequences is manifested. The chaotisation for an asynchronous regime for a large Q factor is not observe - only nonlinear beats of neighbouring modes of generation with spectos as ecvidistant net of frequences is occured.