FREQUENCY SYNTHESIZER Russian patent published in 1997 - IPC

FIELD: radio engineering; radio receivers and transmitters for generating stable frequency spectrum. SUBSTANCE: frequency synthesizer has standard generator 1, reference-frequency sensor 2, first tunable oscillator 3, first variable-ratio frequency divider first phase detector 5, first low-frequency filter 6, second variable-ratio frequency divider 7, frequency setting unit 8, second tunable oscillator 9, mixer 10, first band filter 11, second phase detector 12, second low-frequency filter 13, coarse frequency setting signal shaper 15, noninverting adder 16, multiplier 17, second band filter 18, second multiplier 19, and third low-frequency filter 20. EFFECT: improved speed of response. 1 dwg