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1. 发明授权

US5434694A Signal isolating device 失效
标题翻译：信号隔离装置
公开(公告)号：US5434694A
公开(公告)日：1995-07-18
申请号：US8372
申请日：1993-01-25
申请人： Hitoshi Saito , Takao Kajitani , Kenji Yamaguchi , Akio Yoshino
发明人： Hitoshi Saito , Takao Kajitani , Kenji Yamaguchi , Akio Yoshino
IPC分类号： H04B10/00 , H04B10/04
CPC分类号： H04B10/802
摘要： A signal isolating device, such as used in a signal conditioner which converts an output signal from a temperature sensor, or the like, in a process control system, comprising a pulse width signal outputting means, which receives a pulse width modulated signal and produces differentiated pulses at a leading edge and at a trailing edge of the pulse width modulated signal; a first photo-coupler activated by the differentiated pulse produced at the leadinge edge; a second photocoupler activated by the differentiated pulse produced at the trailing edge; a differential pulse reception means comprising a reception resistor for receiving output pulses from the first photocoupler and the second photocoupler and which produces a set pulse or a reset pulse according to the signal generated at the reception resistor; and a flip-flop circuit which is set or reset by the pulse signal produced by the differential pulse reception means. Advantageously, use of electric power is reduced and signal isolation is attained with stability and without being affected by extraneous noise.
摘要翻译：一种信号隔离装置，例如在用于将来自温度传感器的输出信号转换的信号调节器中使用的信号隔离装置等，其包括脉冲宽度信号输出装置，其接收脉宽调制信号并产生不同的脉冲在脉冲宽度调制信号的前沿和后沿; 由在前缘产生的微分脉冲激活的第一光耦合器; 由在后缘产生的微分脉冲激活的第二光电耦合器; 差分脉冲接收装置，包括接收电阻器，用于接收来自第一光电耦合器和第二光电耦合器的输出脉冲，并根据在接收电阻器处产生的信号产生置位脉冲或复位脉冲; 以及由差分脉冲接收装置产生的脉冲信号设置或复位的触发器电路。有利地，电力的使用减少，并且在稳定的情况下获得信号隔离并且不受外来噪声的影响。

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