公开(公告)号：US4394542A

公开(公告)日：1983-07-19

申请号：US243111

申请日：1981-03-12

申请人： Michio Hara ,  Akinobu Tomimori ,  Hiroshi Hara

发明人： Michio Hara ,  Akinobu Tomimori ,  Hiroshi Hara

IPC分类号： H04M1/58 ,  H04M1/60 ,  H04M1/76

CPC分类号： H04M1/585 ,  H04M1/60 ,  H04M1/76

摘要： A telephone transmission circuit for connection to telephone line terminals includes a transmitter amplifier, a receiver amplifier and a balancing circuit for suppressing the leakage of the output of the transmitter amplifier to the receiver amplifier, the transmitter amplifier being connected to the line terminals so that a power supplied from the line is effectively used. Good impedance matching between the line and the telephone transmission circuit is achieved by the automatic adjustment of the balancing circuit responsive to the line length between the telephone transmission circuit and an exchange.

摘要翻译： 用于连接到电话线终端的电话传输电路包括发射机放大器，接收机放大器和用于抑制发射机放大器的输出到接收机放大器的泄漏的平衡电路，发射机放大器连接到线路终端，使得 从线路供电的电力得到有效利用。 通过根据电话传输电路和交换机之间的线路长度自动调整平衡电路来实现线路和电话传输电路之间的良好的阻抗匹配。

公开(公告)号：US4233474A

公开(公告)日：1980-11-11

申请号：US1361

申请日：1979-01-05

申请人： Esao Hishinuma ,  Akinobu Tomimori ,  Hiroshi Hara

发明人： Esao Hishinuma ,  Akinobu Tomimori ,  Hiroshi Hara

IPC分类号： H04M1/60

CPC分类号： H04M1/6008

摘要： A telephone transmitter amplifier circuit is easy to manufacture in integrated circuit form and has a low power consumption. It has a microphone unit, and an operational amplifier including a differential amplifer. A grounded collector transistor is connected to the output of the differential amplifier and a constant-current circuit is connected to the emitter of that transistor. An output stage amplifier has a grounded emitter transistor having its base connected directly to the output terminal of the operational amplifier. A smoothing circuit smooths the voltage which is supplied from the telephone line to the amplifier. A voltage-divider circuit, at the output of the smoothing circuit, presets the operating points of the operational amplifier and the output stage amplifier. The output terminals of the output stage amplifier are connected in common to input terminals of the smoothing circuit.

摘要翻译： 电话发射机放大电路易于以集成电路形式制造，功耗低。 它具有麦克风单元和包括差分放大器的运算放大器。 接地的集电极晶体管连接到差分放大器的输出端，恒流电路连接到该晶体管的发射极。 输出级放大器具有接地的发射极晶体管，其基极直接连接到运算放大器的输出端。 平滑电路使从电话线向放大器提供的电压平滑。 在平滑电路的输出处的分压电路预设运算放大器和输出级放大器的工作点。 输出级放大器的输出端子共同连接到平滑电路的输入端。

公开(公告)号：US4897862A

公开(公告)日：1990-01-30

申请号：US199481

申请日：1988-05-27

申请人： Kaneyuki Nishihara ,  Akinobu Tomimori ,  Philip H. Rittmueller

发明人： Kaneyuki Nishihara ,  Akinobu Tomimori ,  Philip H. Rittmueller

IPC分类号： H04M11/04

CPC分类号： H04M11/04

摘要： An electronic device for generating an activation signal in response to detection of an acoustic signal having parameters within respective predetermined ranges, and then automatically dialing a prestored telephone number and transmitting a prerecorded message over the telephone line in response to the activation signal. The device includes a transducer for transducing an acoustic signal into an electrical signal; a detector for outputting an activation signal in response to detection of an acoustic signal having parameters within respective predetermined ranges; and a telephone module for automatically dialing a prestored number and transmitting a prerecorded message in response to the activation signal. The detected parameters include the amplitude of the acoustic signal, the frequency of the acoustic signal, the duration of each burst of the acoustic signal, and the duration of each interval between successive bursts of the acoustic signal.

摘要翻译： 一种用于响应于具有各个预定范围内的参数的声信号的检测而产生激活信号的电子设备，然后响应于激活信号自动拨打预先存储的电话号码并通过电话线发送预先记录的消息。 该装置包括用于将声信号转换成电信号的换能器; 检测器，用于响应于具有在相应预定范围内的参数的声信号的检测来输出激活信号; 以及用于响应于激活信号自动拨打预存的号码并发送预先记录的消息的电话模块。 检测到的参数包括声信号的振幅，声信号的频率，声信号的每个脉冲串的持续时间以及声信号的连续脉冲串之间的每个间隔的持续时间。