一种高精度数控宽带直流放大器的设计与实现  

Design and Realization of a High-precision Numerical Control Wide-band DC Amplifier

作　　者：侯爱霞[1] 陶洋[2] 许艳英 

机构地区：[1]重庆科创职业学院信息与机电工程学院,重庆400065 [2]重庆邮电大学通信学院,重庆400065 [3]重庆科创职业学院汽车工程学院,重庆402160

出　　处：《控制工程》2017年第3期575-579,共5页Control Engineering of China

基　　金：重庆市科技攻关计划基金项目(CSTC;2009AB2245)

摘　　要：提出一种高精度数控宽带直流放大器的设计方案。该方案基于超低功耗单片机MSP430F155控制平台开发,其中,压控增益宽带放大器的主体部分由THS7530、OPA820ID与THS3091D组成。控制平台可实现对THS7530的增益控制,输出终波幅值并显示结果;测试通频带为0~20 MHz;整机电压增益可调范围控制在-20^+80 dB范围内;在挂载时输出F-F值为29 V。在降低输出噪声与自激控制方面,使用多模抗干扰接触法,提升了数控宽带直流放大器控制性和稳定性。A high-precision numerical control wide-band DC amplifier is designed. The scheme is based on the low power consumption MCU control platform, which includes the main body of the voltage-controlled gain broadband amplifier that composed of THS7530, OPA820ID and THS3091D. The control platform can realize the control for THS7530, output the amplitude of the end and show the results of it. The test pass band is 0-20 MHz; The voltage gain adjustable range of the amplifier is controlled within -20-＋80 dB; the mount output F-F value is 29 V when the amplifier is loaded. In order to reduce the output noise and self-excitation control, we use the method of multimode interference contact, which improves the controlling and stability of the programmable control DC amplifier.

关 键 词：直流放大器 单片机 增益平坦化 增益温度补偿 THS7530 

分 类 号：TN722.3[电子电信—电路与系统]