电光与控制, 2014, 21 (2): 60, 网络出版: 2014-02-18
光耦在EMCCD电源中的应用
Application of Optocoupler Circuit in EMCCD Power Supply
信号探测 EMCCD供电 光耦特性 光电隔离 温度特性 signal detection EMCCD power supply optocoupler characteristics photoelectric isolation temperature characteristics
摘要
为满足EMCCD供电的特殊要求,基于光耦特性设计了EMCCD供电电源。利用光耦的光电隔离特性实现了输入与控制信号的隔离;利用光耦接收三极管的线性区实现输出电压的连续调整;利用光耦接收三极管的饱和与截止特性实现了上电状态控制;利用高速光电接收二极管及图腾柱电路的高速特性实现了DC-DC电源的同步控制;对各部分光耦电路的温度特性进行了分析,并增加了反馈电路以降低温度影响。实验结果表明,基于光耦的EMCCD电源设计满足应用要求,改进后的输出电压随温度变化率为改进前的8.9%。
Abstract
In order to meet the special requirements of EMCCD, an EMCCD power supply was designed based on optocouplers characteristics.The isolation of the input and control signals was realized by use of the photoelectric isolation characteristic of the optocoupler.The continuous adjustment of the output voltage was achieved by working in the active region of optocouplers receiving transistor.The power-on initial state was controlled by using the saturation and cutoff characteristics of the optocouplers receiving triode.The high-speed optical receiving diode and totem pole circuit were used to achieve the synchronous control of the DC-DC power.The temperature characteristics of optocoupler circuit were analyzed, and feedback circuits were added to reduce the temperature effects.Experiment results show that:1) the EMCCD power supply designed based on optocoupler can meet the application requirements;and 2) the temperature caused change rate of output voltage is 8.9% of the one before improvement.
余达, 刘金国, 薛旭成, 武星星, 李广泽, 周磊, 梅贵. 光耦在EMCCD电源中的应用[J]. 电光与控制, 2014, 21(2): 60. YU Da, LIU Jin-guo, XUE Xu-cheng, WU Xing-xing, LI Guang-ze, ZHOU Lei, MEI Gui. Application of Optocoupler Circuit in EMCCD Power Supply[J]. Electronics Optics & Control, 2014, 21(2): 60.