Due to the frequency pulling of FLL, the passband of the filter in PLL can be made very narrow to suppress the noise, and the PLL can lock carrier's phase with high accuracy.
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。
The phase- locked loop is one kind of control system which is able to achieve phase automatic lock, to compose frequency and to trace demodulation system.
锁相环路是一种能实现相位自动锁定的控制系统，主要用于频率合成及跟踪解调系统。
Finally, a simulation analysis for the improved FFT frequency correction technology and phase-lock loop is maked, the result shows that the method also has a good performance in the low SNR situation.
最后分别对改进的FFT校频技术及锁相环进行了仿真分析，结果表明该方法在低信噪比下仍具有良好的性能。
A fast phase-lock feature can also be enabled to give switch times between 11 and 22 ms depending on absolute frequency and step size.
一种快速锁相功能，也可以启用，使11日至22日开关时间取决于绝对频率和步长毫秒。
We have mainly researched two FM signal demodulation techniques called Frequency Spectrum Separation and Phase Lock Loop in the first part.
一次解调中研究了频谱分离法和锁相法两种实现鉴频的技术。
The phase-locked loop frequency synthesizer is a kind of phase lock installment and it is a kind of separate gap frequency code generator with high stability frequency.
锁相环频率合成器是一种相位锁定装置，是一种频率稳定度较高的离散间隔型频率信号发生器。
The phase-lock technique is widely used in many fields, such as modulation and demodulation circuit and frequency synthesizer circuit.
锁相技术在调制和解调、频率合成电路等很多领域应用极其广泛。
As the voltage VCTR varies, VCO 104 varies the frequency of the VCO output signal, causing phase offsets and increased output jitter when PLL 100 is in lock mode, as shown by dotted line 202.
随着电压VCTR改变，VCO 104改变VCO输出信号的频率，使得当pll 100处于锁定模式时引起脉冲偏移和增大的输出抖动，如图中虚线202所示。
When the phase and frequency of the reference and feedback clock signals are the same, the PLL is in lock mode, and the PFD does not generate pulses in its output signals.
当基准和反馈时钟信号的相位和频率相同时，PLL处于锁定模式，且PFD输出信号中不生成脉冲。
Therefore, the frequency synthesizer works in millimeter wave band is mostly designed and realized by the way of indirect phase lock frequency synthesis, based on specific integrated circuit.
广泛采用的直接数字式频率合成方法，却面临输出频率上限难以提高和输出杂散的难以抑制两个难题。
Therefore, the frequency synthesizer works in millimeter wave band is mostly designed and realized by the way of indirect phase lock frequency synthesis, based on specific integrated circuit.
广泛采用的直接数字式频率合成方法，却面临输出频率上限难以提高和输出杂散的难以抑制两个难题。
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