公开(公告)号：US6147533A

公开(公告)日：2000-11-14

申请号：US135686

申请日：1998-08-18

申请人： Takanori Okuda ,  Naruichi Yokogawa ,  Takayuki Shimizu ,  Fumitaka Nakamura

发明人： Takanori Okuda ,  Naruichi Yokogawa ,  Takayuki Shimizu ,  Fumitaka Nakamura

IPC分类号： H03F3/08 ,  H03F3/30 ,  H03F3/45 ,  H03K5/08 ,  H03K5/12

CPC分类号： H03F3/3066 ,  H03F3/08 ,  H03F3/087 ,  H03F3/3088 ,  H03F3/45112 ,  H03F3/45982 ,  H03K5/082 ,  H03F2203/45544 ,  H03F2203/45631

摘要： A data communication receiving element includes a photo-receiving element for receiving an external light signal and for converting the light signal to a current signal. It further includes an amplifier circuit for amplifying the current signal after converting the current signal to a voltage signal. A waveform shaping circuit is included for shaping an output voltage waveform from the amplifier circuit to a substantially square pulse. Finally, an integrator is included for converting the substantially square pulse to a non-square pulse. This is achieved by extending a rising time necessary for shifting the substantially square pulse from a low potential level to a high potential level, and by extending a falling time necessary for shifting the substantially square pulse from the high potential level to the low potential level. As such, deterioration of an S/N ratio is suppressed.

摘要翻译： 数据通信接收元件包括用于接收外部光信号并将光信号转换为电流信号的光接收元件。 它还包括放大器电路，用于在将电流信号转换成电压信号之后放大电流信号。 包括波形整形电路，用于将来自放大器电路的输出电压波形整形为基本平方的脉冲。 最后，包括用于将基本上方波的脉冲转换成非方波脉冲的积分器。 这是通过将基本上平方脉冲从低电位电平移位到高电位电平所需的上升时间，并且通过延长将基本上平方脉冲从高电位电平移位到低电位电平所需的下降时间来实现的。 因此，S / N比的劣化被抑制。