双极型光栅晶体管的瞬态特性模型及模拟分析

提出一种应用于CMOS图像传感器的新型光电检测器件-双极型光栅晶体管，并建立了其瞬态等效电路模型，利用电路模拟软件HSPICE的多瞬态分析法对双极型光栅晶体管的光电流特性进行了仿真，分析得出这种新型器件在0.6μmCMOS工艺参数下，由于引入pn注入结加速了光电荷的读出速率，光电流随外加电压呈指数式增长，与普通光栅晶体管相比，蓝光响应特性有较大改善。

Transient model and analysis of bipolar junction photogate transistor used in CMOS imagers

A new photodetector, the bipolar junction photogate transistor, was proposed for CMOS image sensor. The transient model of the bipolar junction photogate transistor was built.The photo- current characteristics of the bipolar junction photogate transistor are obtained under the 0.6μ m CMOS process parameter by applying the multiple- transient methods of the HSPICE software.Due to an injection p+ n junction introduced, the readout rate of the photo- charges increases. The simulating results show that the photocurrent increases following the exterior voltage according to the exponent way and the blue respond characteristic is rather improved.