基于FPGA的高性能程控数字移相器设计  

Design of High Performance Programmable Digital Phase Shifter Based on FPGA

作　　者：陈智[1] 闫璞[1] 

机构地区：[1]兰州理工大学技术工程学院,甘肃兰州730050

出　　处：《自动化与仪器仪表》2017年第2期51-52,55,共3页Automation & Instrumentation

摘　　要：数字移相器是利用锁相环,将输出信号频率设置为输入信号频率的360倍,通过数值比较器、计数器进行移相角选择输入,通过D触发器、电子开关和门电路等进行四个象限选择,可实现0-360°范围内任意度数移相,最小步进为1°。本文基于FPGA和单片机技术设计了程控数字移相器。调试和运行结果表明系统结构更加简单,与传统移相器比较,设计的系统性能指有明显的改善。设计结果达到了预期的设计要求,实现了最小1°步进,0-360°范围内任意角度移相的功能。In traditional digital phase shifter scheme the output signal frequency 360 is set to 360 times of that of the input signal by phase locked loop CD4046, digital comparator, counter of phase angle input ,four quadrant selection by D flip-flop, an e- lectronic switch and a gate circuit. The phase shift effect of step 1 is completed in the range of 0 degree to 360 degree. A high per- formance programmable digital phase shifter was designed anti implemented based on FPGA in this paper. The test results show the designed system have many advantages such as simple in structure,improvement in performances, the minimmn I degrees,0 degrees to 360 degrees in the range of arbitrary angle phase shift function.

关 键 词：数字移相 程控 FPGA 锁相环 相位可调 

分 类 号：TN623[电子电信—电路与系统]