FIELD: radio equipment.
SUBSTANCE: invention relates to the field of radio equipment. Frequency modulation frequencies synthesizer consists of in-series connected reference crystal oscillator, a frequency divider with the fixed division factor, frequency-phase detector, low-pass filter, voltage controlled generator, which output is connected to the variable division factor frequency divider input, which output is connected to the frequency-phase detector second input. Additionally, the preliminary distortions device is introduced, which input is connected to the modem first output, and the output is to the low-pass filter second input.
EFFECT: technical result of the invention consists in the frequency-modulated signal production with practically unlimited from above in frequency modulation band.
1 cl, 3 dwg
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