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从单一的数字锁相环入手,引出小数锁相环技术原理、结构和框图,对SA7025组成的小数锁相环实现方法进行探讨,并对TKR-850基地台/中转台的频率合成器的具体应用进行了分析,解释该设备的频率合成器原理。
Starting from a single digital phase-locked loop, the principle, structure and block diagram of the fractional-phase-locked loop technology are introduced. The implementation method of the fractional phase-locked loop composed of SA7025 is discussed. The specifics of the frequency synthesizer of the TKR-850 base station / repeater The application was analyzed to explain the principle of the device’s frequency synthesizer.