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Harmonic signal frequency multipliers allow for attainment of stable high-frequency oscillations at relatively low frequency of reference generator output signal. The existing harmonic signal frequency multipliers have low speed, low efficiency, a high level of side harmonics and a limited range of operating frequencies. In this work, the principles of construction and functioning of harmonic signal frequency multipliers, their main disadvantages and applications are described. A new principle of multiplication of frequency of the sinusoidal voltage is proposed, based on the regulation of input signal phase within 360° by a phase shifter controlled by an alternating sawtooth voltage with amplitude equal to input signal amplitude. The development and research of frequency multipliers implementing the proposed principle was carried out by methods of structural design and mathematical modeling. The results of the development of harmonic frequency doubler and tripler, which have stronger performance than known ones and operate on the basis of the proposed principle, are presented. Their structural schemes are provided. Simulation models of the frequency multipliers under consideration were compiled in the Matlab & Simulink environment and oscillograms of their operation were obtained, confirming their operability and the correctness of the choice of technical solutions. A controlled frequency multiplier has been developed, having a high speed, a low level of side harmonics, a wide range of operating frequencies and an adjustable multiplication factor, including its fractional values. It was demonstrated that the multiplication factor of the developed harmonic signal frequency multipliers can reach several tens.
Evgeny B. Kolesnikov
Novomoskovskiy Institute (branch) D. Mendeleyev University of Chemical Technology of Russia (Russia, 301665, Novomoskovsk, Druzhba st., 8)

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