In frequency synthesis by phase lock, the loop gain will vary by the same amount due to this effect, which generally im - pedes optimization of loop performance.
在锁相频率合成器中，由于压控灵敏度的变化，环路增益也将产生同样大小的变化，这就妨碍了环路特性的最佳化。
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。
This paper describes a method of suppressing correlation jamming at the frequency of reference signal which cannot be suppressed by lock-in amplifier and Boxcar integrator.
锁定放大器和取样积分器都不能抑制与参考信号同频率的干扰。本文提出了一种能抑制这种干扰的方法。
The phenomena of ice-induced steady state vibration and frequency lock-in between ice force and response were observed on offshore platform.
在海洋平台上观测到了冰致结构的稳态振动，以及冰力和平台响应问的频率锁定现象。
The frequency of DFB LD was driven and controlled through such technology as constant current, temperature control in active area, wavelength lock and etc.
该方案通过采用恒流源、有源区温度控制以及波长锁定等技术方法来实现DFBLD的稳频驱动及控制。
Due to steady phase error, low-order PLL has a trouble in tracking frequency ramp signals, so that the receiver cannot lock carrier signals.
低阶锁相环跟踪频率斜升信号时产生的稳态相差致使环路失锁，接收机无法锁定载波信号。
In order to make the track loop into lock quickly, the paper USES FFT spectral analysis to get fine frequency.
为了让跟踪环路快速入锁，这里还采用了FFT谱分析法对频率进行精捕。
DDS and digital phrase-lock technology have been applied in FPGA to improve the accuracy of frequency tracking.
采用高精度的直接数字频率合成（DDS）和数字锁相环技术，实现了高频率跟踪精度。
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。
RFID (Radio Frequency Identification) door lock for keyless entry to a hotel room and other areas of the hotel is becoming more popular in hotels across the world.
无线电频率识别（RFID）门锁： 被用于酒店房间或者酒店各个区域，这种趋势无论在酒店业还是在全世界都逐渐流行。
The accuracy of ring laser gyro is mainly depending on its lock-in threshold and the errors caused by its frequency biasing apparatus.
激光陀螺的精度主要取决于环形激光传感器的闭锁阈值和偏频装置引起的误差。
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。
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。
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。
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。
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。
In this paper, the effects of a follower jamming on the performance of a delay-lock code tracking loop in a frequency hopping system are analysed.
本文分析了跟踪干扰对跳频系统中码跟踪环性能的影响。
Two test methods, both test on boundary scan and test-by-divider, are described in details, especially focusing on the maximum output frequency, the range of output frequency and the time to lock.
分别给出了边界扫描测试和分频器测试两种测试方案，并对两种方案进行了比较，指出了各自的适用范围。
Two test methods, both test on boundary scan and test-by-divider, are described in details, especially focusing on the maximum output frequency, the range of output frequency and the time to lock.
分别给出了边界扫描测试和分频器测试两种测试方案，并对两种方案进行了比较，指出了各自的适用范围。
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