The phase-locked loop frequencysynthesizer is a kind of phaselock 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。
2
The phase-lock technique is widely used in many fields, such as modulation and demodulation circuit and frequencysynthesizer 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。
3
Therefore, the frequencysynthesizer works in millimeter wave band is mostly designed and realized by the way of indirect phaselockfrequency synthesis, based on specific integrated circuit.