Phase-Frequency Dector(PFD) and Charge-Pump(CP) are the crucial components of frequency synthesizer and they could have a large impact on phase noise,reference spur and lock time.

• 鉴相器和电荷泵是频率合成器中的重要组成部分,对相位噪声、参考杂散和锁定时间都有很大的影响。