基于ADF4110的数字鉴相电路设计

Design of Digital Phase Detector Circuit Based on ADF4110

锁相技术已广泛应用于雷达、通信等领域,高性能地实现信号的提取、追踪、频率合成、滤波等功能。在一些重要应用领域中,两个信号之间相位差的精确测量具有重要的意义。由于基于模拟锁相环的鉴相器鉴相范围小,设计出基于ADF4110的数字鉴相电路,用51单片机编程控制分频,并详细介绍其工作原理、工作过程及测试结果。并通过ADIsim PLL软件对ADF4110进行仿真,通过图形更直观地评价电路的输出性能。

Phase lock technology has been widely used in radar, communications and other fields. It can highly achieve the signal extraction, track- ing, frequency synthesis, filtering and so on. In some important applications, the accurate measurement of the phase difference between the two signals is significant. Because of the small number of phase detection based on analog phase locked loop, the digital phase detec- tion circuit based on ADF4110 is designed, which uses 51 single chip programming to control frequency, and this paper introduces the working principle, working process and test result in detail. And through the ADIsimPLL software to simulate the ADF4110, the output performance of the circuit is more intuitive.