SYNTHESISER OF UHF FREQUENCIES WITH LOW LEVEL OF PHASE NOISE Russian patent published in 2010 - IPC H03B21/00 H03L7/00 

FIELD: electricity.

SUBSTANCE: frequency synthesiser contains frequency phase self-tuning ring 1 (FPST 1), containing the following components, series-connected: a generator with yttrium iron garnet resonator 1 (YIG 1), decoupler unit 1, a mixer, a frequency divider by 2, frequency phase detector with a sign reversal 1 (FPDSR 1), DC amplifier 1 (DCA 1), a fine mesh frequency synthesiser, FPST ring 2 containing YIG 2, decoupler unit 2, a stroboscopical transformer, DCA 2, a 100 MHz quartz generator; additionally added are: FPDSR 2 and a frequency divider by 4; a signal is delivered to the mixer input from the first output of decoupler unit 2 to the input whereof the YIG 2 signal is delivered; a signal from the second output of decoupler unit 2 is delivered to the first input of the stroboscopical transformer to the second input whereof a signal from the first output of the 100 MHz quartz generator is delivered; the output of the stroboscopical transformer is connected to the first input of FPDSR 2 to the second input whereof a 25 MHz frequency signal from the output of the frequency divider by 4 is delivered; the input of the frequency divider by 4 is connected to the second output of the 100 MHz quartz generator; the FPDSR 3 output is connected to the input of DCA 2, the output whereof is connected to the input of YIG 2; the third output of the 100 MHz quartz generator is connected to the input of the fine mesh frequency synthesiser.

EFFECT: recession of the output signal phase fluctuation level and accuracy increase.

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