基于ADS的锁相频率合成器仿真

Simulation of PLL Frequency Synthesis based on ADS

现代电子装备中的复杂频率源都是通过频率合成技术来实现,而性能良好的频率合成系统是顺利实现频率合成的工程基础,在实际合成器电路中,相位噪声、杂散分量等影响因素的出现是不可避免的,既降低电路稳定性,输出结果也不理想,严重情况可导致系统故障。因此,有必要在已有实际电路的基础上构建合成系统概念图,根据合成目标信号的特点,添加测试目标和项目,对锁相环频率合成器的电路系统进行优化设计,运用ADS2011对电路进行仿真,通过仿真软件建立相关电路模型,借助多种测试元件对相关参数的观测来找出优化点进行电路优化,仿真模拟实际的信号合成过程,改善实际电路的稳定性和可用性。

In the modern electronic equipment complex frequency source is achieved by frequency synthesis technology. Good performance of frequency synthesis system is the engineering foundation of realizing frequency synthesis. In actual synthesizer circuit,the emergence of the influencing factors such as phase noise and spurious components is inevitable. It reduces the stability of the circuit,and the output is not ideal. If it is severe it can lead to system failure. It is necessary on the basis of the actual circuit compose the system concept map.According to the characteristics of the target signal,add test objectives and projects,optimization design the phaselocked loop frequency synthesizer circuit system. Use the ADS2011 to simulate the circuit and establish the relevant circuit model. Find out the optimal point and optimize circuit by observing related parameters based on a variety of test components. Simulation of the actual signal synthesis process,improve the stability and availability of the actual circuit.