| 半双工RS-485收发器的发送电路设计 |
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| 引用本文： | 刘艳丽,应建华,宋敏,邹望辉.半双工RS-485收发器的发送电路设计[J].华中科技大学学报(自然科学版),2004,32(2):49-51. |
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| 作者姓名： | 刘艳丽 应建华 宋敏 邹望辉 |
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| 作者单位： | 华中科技大学,电子科学与技术系,湖北,武汉,430074;华中科技大学,电子科学与技术系,湖北,武汉,430074;华中科技大学,电子科学与技术系,湖北,武汉,430074;华中科技大学,电子科学与技术系,湖北,武汉,430074 |
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| 摘 要： | 介绍了一种半双工RS-485通信收发器的发送电路的设计，该电路具有数据传输率高(2．5Mbit／s)、大驱动电流(可驱动32个收发器)的特点，且具有高电压保护和过流保护的功能．为了进一步提高电路性能，在设计中灵活运用了肖特基势垒二极管．并用candence公司的spectre进行仿真，结果表明可实现预定目标．
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| 关 键 词： | RS-485接口协议 发送电路 肖特基势垒二极管 恒流源 |
| 文章编号： | 1671-4512(2004)02-0049-03 |
| 修稿时间： | 2003年8月11日 |
The design of transmitting circuit of half-duplex RS-485 communication transceiver |
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| Liu Yanli Ying Jianhua Song Min Zou WanghuiPostgraduate, Dept. of Electronics Sci. & Tec h.,Huazhong Univ. of Sci. & Tech.,Wuhan ,China..The design of transmitting circuit of half-duplex RS-485 communication transceiver[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2004,32(2):49-51. |
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| Authors: | Liu Yanli Ying Jianhua Song Min Zou WanghuiPostgraduate Dept of Electronics Sci & Tec h Huazhong Univ of Sci & Tech Wuhan China |
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| Institution: | Liu Yanli Ying Jianhua Song Min Zou WanghuiPostgraduate, Dept. of Electronics Sci. & Tec h.,Huazhong Univ. of Sci. & Tech.,Wuhan 430074,China. |
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| Abstract: | This paper introduced the design of transmitting circ ui t of half-duplex RS-485 communication transceiver. It was characterized by hig h speed (2.5?Mbit/s), great driven current (able to drive 32 transceivers), and protection against high voltage and supercurrent. In order to improve the circu it performance, Schottky barrier diode was used. Spectre software was used to si mulate and verify the design. The simulation results indicated that the design a chieved the goals expected. |
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| Keywords: | RS-485 protocol transmitting circuit S chottky barrier diode constant current source |
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