Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phase Locked Loop of the Spin-Torque Nanooscillator   We have studied the dynamics of a spin-torque nanooscillator's (STNO) phase
locked loop (PLL) generating microwave oscillations in a broad range of
frequencies under the effect of direct current and external magnetic field.
Bifurcations in the system caused by a change in the frequency detuning of
synchronized oscillations are considered. Bands of phase locking and
synchronism are determined. The existence of a phase locking band in the
filterless PLL of STNOs basically distinguishes these oscillators from other
types of microwave generators.

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The categories of this paper are: astro-ph
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: cmp-lg
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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-th
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The categories of this paper are: cs
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The categories of this paper are: nucl-th