IRIG-B直流时码计时器电路的设计与实现

摘要

IRIG-B直流时码是美国靶场仪器组织规定的标准时码之一,具有编解码方式简单、速率适中、编码信息量丰富的特点,广泛应用于通信、计算、测量领域时统设备中。但随着电子工业的发展,IRIG-B直流时码的秒级授时精度已经难以满足现代高精度时钟同步系统的需求,且由于IRIG-B直流时码抗干扰性能较差,容易出现误码,导致授时错误。文中基于IRIG-B时码标准,提出了一种IRIG-B直流时码计时器电路。该电路能够实现精度达到微秒级的授时,还能对收到的IRIG-B直流时码进行检验,剔除不标准的时码。该电路已经应用于多款时统设备中,工程实践表明,其授时精度高于微秒级,且能够避免误码对授时精度的影响,可广泛应用于时统设备领域。%IRIG-B DC time code is one of standard time code stipulated by RCC ( Range Commanders Council) ,it has the characteristics of simple encoding,middle-class code speeding,rich information,and is widely used in the SYNC equipment of communication,calcula-tion and measurement. But with the development of the electronic industry,the second-level timing accuracy of the IRIG DC time code could not meet the requirement of the high level SYNC equipment,and its low-level anti-interference performance could lead to error code. Based on the IRIG-B DC time code standard,give a IRIG-B DC time code circuit. This circuit could realize the microsecond-level timing accuracy,and could check the input IRIG DC code and find the error code,which is used in many kinds of SYNC equipment. En-gineering practice shows that,its timing accuracy is better than microsecond-level,and could avoid the influence of timing accuracy that caused by error code,which could be used widely in the timing accuracy area.