公开(公告)号：US4024351A

公开(公告)日：1977-05-17

申请号：US652051

申请日：1976-01-26

申请人： Edwin Coy Ingle

发明人： Edwin Coy Ingle

IPC分类号： H04Q3/42 ,  H04M19/00 ,  H04Q1/30

CPC分类号： H04M19/006

摘要： Transmission and signaling range of a telephone transmission line is extended by controllably inserting boost potentials into the line to series aid an applied central office battery. Insertion of the potentials is realized by sensing the direction of current flow in the line and switching a corresponding potential into the line. Optical isolators, each including a light emitting diode and phototransistor, are advantageously employed as line current sensors and switching elements. Insertion of boost potential into the line is controllably delayed in response to changes in the direction of current flow caused by apparent reversals in the polarity of the applied central office battery.

摘要翻译： 电话传输线的传输和信令范围通过可控制地将升压电位插入线路来扩展，以串联辅助应用的中心局电池。 通过感测线中的电流流动的方向并将相应的电位切换到线中来实现电位的插入。 各自包括发光二极管和光电晶体管的光隔离器有利地用作线电流传感器和开关元件。 响应于由所使用的中心局电池的极性的明显反转引起的电流方向的变化，可控制地延长线中的升压电位的插入。

公开(公告)号：US3992591A

公开(公告)日：1976-11-16

申请号：US571868

申请日：1975-04-25

申请人： Edwin Coy Ingle

发明人： Edwin Coy Ingle

IPC分类号： H04M7/04 ,  H04M19/00 ,  H04B3/36 ,  H04Q1/30

CPC分类号： H04M19/006

摘要： Transmission and signaling range of a telephone transmission line is extended by controllably inserting boost potentials into the line to series aid an applied central office battery. Insertion of the potentials is realized by sensing the direction of current flow in the line and switching a corresponding potential into the line. Optical couplers, each including a light emitting diode and an associated phototransistor, are employed as the line current sensing elements and switching elements.

摘要翻译： 电话传输线的传输和信令范围通过可控制地将升压电位插入线路来扩展，以串联辅助应用的中心局电池。 通过感测线中的电流流动的方向并将相应的电位切换到线中来实现电位的插入。 采用各自包括发光二极管和相关光电晶体管的光耦合器作为线电流感测元件和开关元件。

公开(公告)号：US4095125A

公开(公告)日：1978-06-13

申请号：US773006

申请日：1977-02-28

申请人： Edwin Coy Ingle

发明人： Edwin Coy Ingle

IPC分类号： G01R29/027 ,  H03K9/08

CPC分类号： G01R29/027

摘要： Pulse signals are detected and/or filtered depending on pulse width. A first timing circuit is employed to establish first minimum interval T1 and a second timing circuit responsive to the first timing circuit timing out is employed to establish second timing interval T2. A third maximum interval T3 is defined as T1 + T2. Pulse signals having widths within a valid time interval window greater than minimum interval T1 and less than maximum interval T3 are detected and filtered. Pulse signals having widths less than interval T1 are not detected and are filtered. Pulse signals having widths greater than interval T3 are not detected or filtered. Pulse signals within the valid time interval window are detected by employing light emitting diodes to sense operative states of the timing circuits.