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    초록·키워드

    This paper discribes a frequency synthesizer for low rate frequency hopping communication system. The frequency synthesizer covers 42.5MHz - 100.5MHz frequency range with 25KHz step, less than 1 msec acquisition time. All output frequencies are obtained from one-loop phase-locked-loop's voltage controlled oscillator that has five frequency bands. By switching resistor transfer function of each loop filter can be changed. Each frequency band has loop filter to speed up acquisition time and compensate for difference of each band's VCO gain. And also auxiliary filter was inserted for the purpose of reference filtering.

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      UCI(KEPA) : I410-ECN-0101-2009-569-013184144