FIELD: radio engineering.
SUBSTANCE: frequency synthesizer includes voltage-controlled generator, two frequency dividers with variable division factor, two low pass filters, reference frequency signal source, two frequency dividers with fixed division factor, two frequency-phase detectors, controlled attenuator, switch, two synchronism indicators, logic matching circuit, D-trigger, dual-mode self-oscillator and microcontroller.
EFFECT: improving quick action and purity of spectrum of frequency synthesizer output signal.
6 dwg
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