锁频环路
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frequency and phase lock loop 锁频锁相环
Fractional-N Phase-Lock Loop Frequency Synthesizer 小数分频锁相环频率合成
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Because of the frequency lock loop traction PLL filter can be designed very narrow, with very good noise suppression performance, to meet the precise requirements of carrier phase tracking.
由于有锁频环的频率牵引，锁相环路滤波器可以设计得很窄，具有很好的抑噪性能，满足精确跟踪载波相位的要求。
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