光电三极管是一种晶体管，它有三个电极，其中基极未引出。当光照强弱变化时，电极之间的电阻会随之变化。光电三极管可以根据光照的强度控制集电极电流的大小，从而使光电三极管处于不同的工作状态，光电三极管仅引出集电极和发射极，基极作为光接收窗口。
探讨并分析具有光致负阻特性的双极型硅光电三极管阵列中各单元器件设置偏流隔离电阻的必要性。
The necessity of setting the bias current and segregation resistances in every element of bipolar silicon photo-negative resistance phototransistor array is studied and analysed.
光控MOS栅固态继电器是由MOS栅控晶闸管、开关三极管、光电耦合器、增强型MOSFET和齐纳二极管组成的新型开关器件。
Optically triggered MOS gated solid state relay is a new switching device, which is composed of an MOS gated thyristor, a phototransistor, an enhanced mode MOSFET and a Zener diode.
利用光敏三极管代替硅光电池和光敏二极管来测试单缝和双缝衍射的光强分布。
This paper introduces a new method to measure the intensity distribution of single seam diffraction by replacing the silicon photocell and light activated diode with light activated triode.
应用推荐