一种改进的M-BUS主机接口电路的设计与仿真  

Design and simulation of an improved M-BUS host interface circuit

作　　者：胡必君 梁华国[1] 易茂祥[1] 许达文 徐秀敏[1] Hu Bijun Liang Huaguo Yi Maoxiang Xu Dawen Xu Xiumin(School of Electronic Science ＆ Applied Physics, Hefei University of Technology, Hefei 230009, Chin)

机构地区：[1]合肥工业大学电子科学与应用物理学院,安徽合肥230009

出　　处：《电子技术应用》2017年第1期99-102,共4页Application of Electronic Technique

基　　金：安徽省科技攻关项目(1501041138)

摘　　要：M-BUS(仪表总线)以远程供电及自由拓扑等特点被广泛应用于仪表或者传感器的通信中,而其带负载能力和接收处理能力是限制其应用范围的两个关键因素,为此,对现有的一种高驱动主机发送电路和传统的主机接收电路分别进行改进。发送电路通过调整电路结构,增加MOS管驱动电路和栅极保护电路,完善电路的关闭功能,从而在保持高驱动的同时,提高了电路运行的可靠性;接收电路采用差动运放对接收信号进行预处理再比较,提高了电路对变化负载的适应性和抗干扰能力。对改进后的发送电路和接收电路分别进行对比仿真,结果显示其收发性能均得到改善。M-BUS （Meter Bus） is widely used in the communication of instruments or sensors with the characteristics of remote power supply and free topology, while its loading capacity and receiving capability are two key factors in limiting its scope of ap- plication. The improvements of an existing high-driving transmission circuit and a traditional host receiving circuit were respectively carried out on the host side. The reliability of the transmission circuit was improved by adjusting the structure of the circuit while the high driving force of the circuit was maintained. It added the MOS tube driving circuit and the gate protection circuit, and im- proved closing function of the circuit. A differential amplifier to preproeess the received signal was adopted in the receiving circuit, which improved the anti-jamming capability and the adaptability to changing load. The transceiver circuit is simulated, and the ex- perimental resuhs indicate that the performance of the transceiver is improved.

关 键 词：仪表总线 主机 接口电路 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]