But if the Doppler frequency offset exceed the capture range of PLL, the carrier synchronization will fail.
但是，一旦多普勒频移超出了锁相环的频率捕捉范围，就无法完成载频同步。
The simulation results show that the designed PLL frequency synthesizer meets the design specification and it can be used in the integrated wideband if with double conversion wireless RF receiver.
仿真结果表明，该锁相环频率综合器达到了设计指标，可以应用于两次变频的“宽带中频”集成接收机。
Its output current will produce serious harmonic pollution, and if without using a precise PLL, its transformation efficiency will be decreased.
其输出电流滤波不但会对电网产生严重的谐波污染，同时其输出电流锁相不精确会降低系统的转化效率。
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