FREQUENCY SYNTHESIZER Russian patent published in 1997 - IPC

FIELD: radio engineering, in particular, generation of reference frequency grid in receivers and transmitters. SUBSTANCE: device has reference oscillator 1, first tuned oscillator 2, controlled frequency divider 3, first phase detector 4, first low-pass filter 5, second tuned oscillator 6, second phase detector 7, second low-pass filter 8, non-inverting adder 9, frequency setting unit 10, OR gate 11, memory unit 12 and pulse generator 13. EFFECT: decreased frequency modulation of output voltage. 2 dwg