扰偏器驱动电路的新型程控放大器设计  

Design of New Type Programming Gain Amplifier for Driving Circuit of Polarization Scrambler

作　　者：张益昕[1] 王顺[1] 路元刚[1] 张旭苹[1] 

机构地区：[1]南京大学光通信工程研究中心,南京210093

出　　处：《自动化仪表》2007年第11期55-57,共3页Process Automation Instrumentation

基　　金：国家自然科学基金项目(编号:60644001;60607007)

摘　　要：自发布里渊散射分布式光纤传感系统中的扰偏器需要高速驱动电路来驱动。讨论了现有程控放大器的特点,在指出其不足之处的同时,提出了一种使用模拟乘法器和数模转换器实现程控放大器的新设计方案。这种新放大器拥有高转换速率和带宽,其增益由单片机输出的数字量控制,不仅可以用来驱动扰偏器,还适用于其它智能仪表和自动控制系统。High-speed driver is needed to operate the polarization scrambler for the spontaneous Brillouin scattering distributed optical fiber sensor system. The existing programming gain amplifiers and their shortcomings are reviewed, then a new design strategy by using analogue multiplier and D/A converter is stated. The new type amplifier possesses high convert rate and bandwidth. The gain of the amplifier is controlled by digital output of the single chip computer. It can be used to drive the polarization scrambler, and it is suitable for other intelligent iustrmnents and automatic control systems.

关 键 词：程控放大器(PGA) 扰偏器 模拟乘法器 转换速率 带宽 驱动电路 

分 类 号：TN721[电子电信—电路与系统] TN722