基于FPGA的IRIG-B(DC/AC)转换器的设计  

Design of Converter for IRIG-B(DC/AC)Based on FPGA

作　　者：印黄燕[1] 杨书杰[1] YIN Huang-yan;YANG Shu-jie(Jiangsu Maritime Institute,Nanjing 211170 China)

机构地区：[1]江苏海事职业技术学院,江苏南京211170

出　　处：《自动化技术与应用》2022年第11期56-60,共5页Techniques of Automation and Applications

摘　　要：本文分析了IRIG-B时间码的两种形式之间的关系,用FPGA跟踪直流B码,准点发送1KHz正弦波的200点模拟数据给DAC0800,使得DAC0800输出互补电流经过负载电阻转换为差分电压,再应用运算放大电路转换为单端对地电压,用反相加法进行过零点微调修正,最后采用变压器隔离输出。对比测试表明交流B码时间准确,有较高的实用性。This paper analyzes the relationship between two forms of IRIG-B time code,Tracking DC B Code with FPGA,200 point analog data of 1 KHz sine wave is sent to DAC0800 on time.The DAC0800's complementary output current is converted to a differential voltage via the load resistance and then converted to a single end to ground voltage using the operational amplifier,the zero-cross-ing Adjustment is corrected by inverse addition method,and the output is isolated by transformer.The comparison test shows that the time of B(AC)code is accurate and practical.

关 键 词：FPGA DAC 码元 差分放大 反相加法 

分 类 号：TP622[自动化与计算机技术—控制理论与控制工程]