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FREQUENCY SYNTHESIZER HAVING AUTOMATIC PHASE-LOCK LOOP STARTED BY DIGITAL SYNTHESIZER HAVING DIRECT FREQUENCY SYNTHESIS
FREQUENCY SYNTHESIZER HAVING AUTOMATIC PHASE-LOCK LOOP STARTED BY DIGITAL SYNTHESIZER HAVING DIRECT FREQUENCY SYNTHESIS
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机译:具有直接频率合成功能的数字合成器启动的具有自动锁相环的频率合成器
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摘要
FIELD: communication engineering. SUBSTANCE: device has oscillator for shaping variable frequency signal in digital form, the first and the second automatic phase-lock loops, power divider, two switches, adder. Synthesis method involves shaping variable frequency signal in digital form, dividing it by power into two reference signals, filtering variable frequency signal in the first automatic phase-lock loop, delivering the first or the second reference signal depending on switching control signal, to the second automatic phase-lock loop input distinguished by significantly lesser completion time than the first one. EFFECT: accelerated completion time; high spectral purity of signal. 7 cl, 4 dwg
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