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西德 AEG—Telefunken 公司生产了两种新型光电控制元件——BPX28及 BPX37。光电控制元件 BPX28在许多情况下都可作为高灵敏度的光电晶体管使用,它特别适用于直接控制电器。在与 TO5相似的具有平面窗口的外壳中把一个2×2毫米大小的光电元件和一个硅—NPN—外延平面晶体管、一个偏压二极管及一个雪崩二极管组接在一起。在工作
West Germany AEG-Telefunken company produced two new photoelectric control components - BPX28 and BPX37. The optoelectronic control element BPX28 can be used as a highly sensitive phototransistor in many cases and is particularly suitable for direct control of electrical appliances. A 2 x 2 mm optoelectronic element is joined to a silicon-NPN-epi-planar transistor, a bias diode and an avalanche diode in a housing with a planar window similar to the TO5. working