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当设计者用光电晶体管将一个调制后的光信号转换成电信号时,如果有高亮度的背光使光电晶体管饱和,就会遇到麻烦。当光电晶体管基极端悬浮时,其集电极/射极电压只取决于信号与背光重叠而产生的
When a designer converts a modulated optical signal into an electrical signal using a phototransistor, it can be troublesome to have the phototransistor saturated with a high brightness backlight. When the base of the phototransistor base levitation, its collector / emitter voltage is only dependent on the signal and the backlight overlap