摘要
基于电流镜积分读出电路的X射线CMOS图像传感器 (CMI X IS)的原理 ,并对电流镜积分读出电路进行了计算机模拟。对CMI X IS的性能参数进行了测试 ,并对光电转换特性曲线进行了分析。设计了CMI X IS的应用电路 ,得到了不同密度、不同尺寸材料的视频信号波形。测试结果和实验表明 ,CMI X IS具有较低的暗噪声、较大的响应度、较高的输出电压和较宽的动态范围 ,可以应用于X射线实时成像检测领域。
The principle of X ray CMOS Image Sensor baesd on readout circuit called Current Mirroring Integration (CMI X IS) was introduced,and computer simulation of the current mirroring integration readout circuit was fulfilled. Performance parameters of CMI X IS were measured, and the curve of photoelectric conversion characteristic of CMI X IS was analyzed. The application circuit of CMI X IS was designed, the video signal waveform of different density and different size material was obtained. The measurement result and experiment show that CMI X IS has some characteristics of lower noise of dark output voltage, larger responsivity, higher output voltage and wider dynamic range. CMI X IS can be used for X ray real time radioscopy inspection fields.
出处
《传感技术学报》
CAS
CSCD
2004年第4期647-650,共4页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金资助项目 (6 0 0 770 2 5 )
关键词
电流镜积分读出电路
X射线图像传感器
计算机模拟
光电转换特性
应用电路
视频信号
current mirroring integration readout circuit
X-ray image sensor
computer simulation
photoelectric conversion characteristic
application circuit
video signal
