HDB3码型变换电路设计的研究  

Research for design of the alternates circuit of HDB3

作　　者：卢威[1] 黄钱飞[1] 陈慕君[1] 

机构地区：[1]江西现代职业技术学院,江西南昌330095

出　　处：《宁波职业技术学院学报》2008年第5期17-21,共5页Journal of Ningbo Polytechnic

摘　　要：为了解决高速长距离通信技术中的衰减、抗干扰及误码等技术问题,设计了基于CD22103和CD4052等集成芯片的HDB3码型变换电路。首先,利用专用集成芯片CD22103完成AMI/HDB3编译码功能,然后将输出的信号通过CD4052实现单-双极性信号的变化,在对AMI/HDB3码进行译码之前,采用整流电路将信号经双/单极性变换得到相应的正极性信号和负极性信号再送译码芯片。HDB3码型变换电路很好的完成了NRZ码和HDB3码相互转换,利用HDB3码型传输克服了以往AMI码型传输的缺点,实验测出输出信号波形、频谱符合理论要求,满足了实际的通信系统传输要求。For solve the problems such as mistake yard, interference rejection and the attenuation in the high speed communication of long distance, the alternate circuit of the HDB3 that based on the integrated chips CD22103 and CD4052 was designed. First, using integrated chip CD22103 complete AMI/HDB3 for special purpose, compile yard function. Then, it is single to realize export signal through CD4052-the change of bipolar signal, before decoding for the yard of AMI/HDB3, alternate signal by two / single polarities with rectification circuit to get the corresponding signal of positive electrode and the signal of negative pole and then send to decode chip. HDB3 pattern of sling-load alternates circuit have completed NRZ yard and the HDB3 yard very well, shortcoming that changes mutually and has surmounted the before AMI transmission of pattern of sling-load using the HDB3 transmission of pattern of sling-load, test to measure export signal waveform and frequency spectra according to theoretical requirement, the communication system has satisfied actual transmits requirement.

关 键 词：编码 译码 HDB3 抗干扰 衰减 

分 类 号：TM13[电气工程—电工理论与新技术]