Voltage controlled oscillator (VCO) and frequency divider (FD) are the main components of phase locked loop (PLL). For VCO, low phase noise can avoid the affection of Adjacent-Channel Interference.

• 摘要:压控振荡器与除频器是锁相迴路中，主要的电路之一。对压控振荡器而言，低相位杂讯可避免造成相邻通道的干扰。