力士乐放大器/德国REXROTH中国上海供应摘要：通过对力士乐比例方向阀ＶＴ３００６－Ｓ－３０型电子放大器组成及工作原理的基本知识介绍，以供拥有这种阀的液压系统调试、使用和维护之操作者参考。主题词：液压系统液压元件力士乐比例方向阀ＶＴ３００６－Ｓ－３０型电子放大器潍坊柴油机有限责任公司进口ＨＷＳ静压造型生产线，其液压系统中多处使用力士乐比例阀，致使整力士乐放大器/德国REXROTH中国上海供应个液压系统的控制具有良好的性能。比例方向阀是比例阀的一种，它是按输入电信号来连续、按比例地对油液的方向进行远距离控制的阀。电信号是由其所属的ＶＴ３００６－Ｓ－３０型电子放大器产生的，了解该种放大器的功能和使用知识，将有利于对拥有这种阀之液压系统的厂家，在系统的调试、保证设备正常运行和维修时参考之用。１ＶＴ３００６┐Ｓ┐３０型放大器的功能该放大器的组成线路图如图１所示。主要包括带有五个可调斜坡时间的斜坡形成器（总时间为０．０３～５ｓ）、函数形成器、模拟累加器、电流调节器、节拍发生器、功率放大器和电源五部分。图１ＶＴ３００６－Ｓ－３０型放大器力士乐放大器不但可对光信号进行直接放大，同时还具有实时、高增益、宽带、在线、低噪声、低损耗的全光放大功能，是新一代光纤通信系统中*的关键器件；由于这项技术不仅解决了衰减对光网络传输速率与距离的限制，更重要的是它开创了1550nm频段的波分复用，从而将使超高速、超大容量、超长距离的波分复用（WDM）、密集波分复用（DWDM）、全光传输、光孤子传输等成为现实，是光纤通信发展*的一个划时代的里程碑。在目前实用化的光纤放大器中主要有掺铒光纤放大器（EDFA）、半导体光放大器（SOA）和光纤拉曼放大器（FRA）等，其中掺铒光纤放大器以其*的性能现已广泛应用于长距离、大容量、高速率的光纤通信系统、接入网、光纤CATV网、军用系统（雷达多路数据复接、数据传输、制导等）等领域，作为功率放大器、中继放大器和前置放大器
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