Broadband X-band direct frequency synthesizer and signal generation method
A frequency synthesizer, X-band technology, applied in the field of electronic equipment, can solve the problems of poor working stability, large changes in voltage control sensitivity, inability to achieve speed, etc., to achieve the effect of light weight and low phase noise
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[0013] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0014] A broadband X-band direct frequency synthesizer, its working principle block diagram is shown in figure 1 100MHz crystal oscillator 1 with high frequency accuracy and low phase noise in the figure is the reference signal, and it is input to the frequency frequency standard generation circuit, that is, the fine-point coarse-point frequency generation circuit and the low-band frequency standard generation circuit 2, which generate 10MHz intervals 20 fine-point frequencies, 5 coarse-point frequencies at intervals of 200MHz, the first low-band frequency marker signal and the second low-band frequency marker signal. Input the 20 fine-point frequencies and the first low-band frequency standard into the first up-conversion unit 5 to obtain 20 low-band fine-point frequencies.
[0015] The second upconverter unit 6 includes two upconverters. Th...
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