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1. 发明授权

US5402485A Two-wire termination impedance generation circuit of subscriber circuit 失效
标题翻译：用户电路的二线终端阻抗产生电路
公开(公告)号：US5402485A
公开(公告)日：1995-03-28
申请号：US189412
申请日：1994-01-31
申请人： Kenji Takato , Kazuhiro Yoshida , Kazuyuki Minohara , Yoshinobu Imai , Takeshi Nishioka
发明人： Kenji Takato , Kazuhiro Yoshida , Kazuyuki Minohara , Yoshinobu Imai , Takeshi Nishioka
IPC分类号： H04Q3/42 , H04M3/00 , H04M19/00 , H04M1/76
CPC分类号： H04M3/005 , H04M19/005
摘要： A two-wire termination impedance generation circuit of a subscriber circuit including differential amplifiers, which is provided with a network circuit including capacitors and resistors, an input point, and current sources, the capacitor being comprised of series connected first and second capacitors, the resistor being comprised of series connected first and second resistors and having a high band bypass capacitor connected at the intermediate connecting point of the same, and the resistor being comprised of a complex termination resistor forming an internal termination impedance and a series connected complex termination resistor and complex termination capacitor being connected directly to the telephone line as an external termination impedance, wherein the frequency characteristics can be improved in three ways.
摘要翻译：一种包括差分放大器的用户电路的二线终端阻抗产生电路，其具有包括电容器和电阻器的网络电路，输入点和电流源，所述电容器由串联连接的第一和第二电容器组成，所述电阻器由串联连接的第一和第二电阻器组成，并具有连接在其中间连接点处的高频带旁路电容器，并且该电阻器由形成内部终端阻抗的复合终端电阻器和串联连接的复合终端电阻器和复合体组成终端电容器直接连接到电话线作为外部终端阻抗，其中可以三种方式改善频率特性。

2. 发明授权

US5347577A Battery feed circuit for supplying feed current to telephone set 失效
标题翻译：用于向电话机供电的电池供电电路
公开(公告)号：US5347577A
公开(公告)日：1994-09-13
申请号：US939913
申请日：1992-09-03
申请人： Kenji Takato , Kazuhiro Yoshida , Kazuyuki Minohara
发明人： Kenji Takato , Kazuhiro Yoshida , Kazuyuki Minohara
IPC分类号： H04M19/00 , H04Q3/42
CPC分类号： H04M19/005
摘要： A battery feed circuit supplies a feed current to a telephone set via a 2-wire telecommunication line formed of a TIP line and a RING line. The battery feed circuit includes a first voltage detection circuit for detecting a first voltage across the TIP line and a ground line, a second voltage detection circuit for detecting a second voltage across the RING line and a power line connected to a power supply of the battery feed circuit, a current source responsive to a first control signal for respectively generating first and second currents in the TIP and RING lines, the first and second currents being equal in magnitude and opposite in direction, the current source also varying the first and second currents in response to a second control signal so as to be in proportion to a common mode voltage across the TIP and RING lines, a first feedback circuit responsive to the first and second voltages detected by the first and second voltage detection circuits for generating the first control signal, and a second feedback circuit for generating the second control signal by detecting the common mode voltage across the TIP and RING lines.
摘要翻译：电池馈送电路通过由TIP线和RING线形成的2线电信线路向电话机提供馈电电流。电池供给电路包括用于检测跨越TIP线和接地线的第一电压的第一电压检测电路，用于检测RING线两端的第二电压的第二电压检测电路和连接到电池的电源的电力线馈电电路，响应于第一控制信号的电流源，用于分别在TIP和RING线中产生第一和第二电流，第一和第二电流在幅度上相等并且在方向上相反，电流源还改变第一和第二电流响应于第二控制信号以与TIP和RING线两端的共模电压成比例的第一反馈电路，响应于由第一和第二电压检测电路检测的第一和第二电压，用于产生第一控制信号和第二反馈电路，用于通过检测跨越TIP和RING的共模电压来产生第二控制信号线条。

3. 发明授权

US5335271A Ring trip detection circuit 失效
标题翻译：环路跳闸检测电路
公开(公告)号：US5335271A
公开(公告)日：1994-08-02
申请号：US938771
申请日：1992-09-03
申请人： Kenji Takato , Kazumi Kinoshita , Kiyoshi Kurosaki , Taichi Kosako , Kazuyuki Minohara
发明人： Kenji Takato , Kazumi Kinoshita , Kiyoshi Kurosaki , Taichi Kosako , Kazuyuki Minohara
IPC分类号： H04M3/02 , H04M19/02
CPC分类号： H04M19/026
摘要： A ring trip detection circuit detects an OFF-hooked state of a telephone receiver during ringing of a telephone set by detecting a change in a voltage across two terminals of a transmission resistor through which a ringing signal is supplied to the telephone set from a ringing signal source. The ring trip detection circuit includes a voltage dividing circuit coupled to the two terminals of the transmission resistor for dividing voltages at the two terminals and for outputting divided voltages, a pair of transistors having bases for respectively receiving the divided voltages from the voltage dividing circuit, a constant current source, a pair of resistors having first terminals respectively coupled to emitters of the pair of transistors and second terminals coupled in common to the constant current source, where the pair of resistors have the same resistance, and a current mirror circuit coupled to collectors of the pair of transistors for outputting an output current which indicates whether or not the telephone receiver is OFF-hooked.
摘要翻译：环路跳闸检测电路通过检测发送电阻的两端的电压变化来检测电话接收机的摘机状态，通过该电阻将振铃信号从振铃信号提供给电话机资源。环路跳闸检测电路包括：分压电路，耦合到发送电阻器的两个端子，用于分割两个端子处的电压，并输出分压;一对晶体管，具有分别接收来自分压电路的分压电压的基极; 恒定电流源，一对电阻器，其具有分别耦合到所述一对晶体管的发射极的第一端子和共同耦合到恒定电流源的第二端子，其中所述一对电阻器具有相同的电阻;以及电流镜电路，耦合到用于输出表示电话接收机是否脱机的输出电流的一对晶体管的集电极。

4. 发明授权

US5402482A Ring trip deciding circuit 失效
标题翻译：环路决定电路
公开(公告)号：US5402482A
公开(公告)日：1995-03-28
申请号：US983864
申请日：1993-03-05
申请人： Kazuyuki Minohara , Kenji Takato
发明人： Kazuyuki Minohara , Kenji Takato
IPC分类号： H04M3/22 , H04M19/02 , H04M1/24 , H04M1/60 , H04M3/00 , H04M13/00
CPC分类号： H04M3/2272 , H04M19/026
摘要： A ring trip deciding method in a ring trip circuit detects voltage change in the on-hook state and the on-hook state of a terminal when the terminal such as telephone set connected to the telephone line is called. The ring trip deciding circuit has a ring trip detecting resistance connected in series with a ringer generator for detecting change of current value depending on the on-hook and off-hook states, a detector for detecting voltage change across the ring trip detecting resistance, a voltage comparator for outputting different values when the threshold value is larger or smaller by comparing a voltage outputted from the detector with the threshold value, a first state latch for latching and outputting different state values depending on different output values of the voltage comparator, a composite state latch for fetching, latching and outputting at least two state values outputted from the first state latch synchronously with a clock, and a state deciding circuit for comparing state values of the composite state latch to detect the on-hook and off-hook states of the terminal.
摘要翻译： PCT No.PCT / JP92 / 00863 Sec。 371日期1993年3月5日 102（e）日期1993年3月5日PCT提交1992年7月7日PCT公布。出版物WO93 / 01676 日期：1993年1月21日。当呼叫连接到电话线的电话机等终端被调用时，环路跳闸电路中的环路决定方法检测挂机状态下的电压变化和终端的挂机状态。环路决定电路具有与振铃发生器串联连接的环路跳闸检测电阻，用于根据挂机和摘机状态检测电流值的变化，用于检测环路跳闸检测电阻两端的电压变化的检测器，电压比较器，用于通过将从检测器输出的电压与阈值进行比较而在阈值较大或更小时输出不同的值;第一状态锁存器，用于根据电压比较器的不同输出值进行锁存和输出不同的状态值;复合状态锁存器，用于从时钟同步地获取，锁存和输出从第一状态锁存器输出的至少两个状态值;以及状态判定电路，用于比较复合状态锁存器的状态值，以检测复合状态锁存器的挂机和摘机状态终点站。

5. 发明授权

US06310953B1 Subscriber circuit 失效
标题翻译：用户电路
公开(公告)号：US06310953B1
公开(公告)日：2001-10-30
申请号：US09067902
申请日：1998-04-28
申请人： Kazuhiro Yoshida , Kenji Takato
发明人： Kazuhiro Yoshida , Kenji Takato
IPC分类号： H04M100
CPC分类号： H04M3/007 , H04M3/005 , H04M3/2272
摘要： In a subscriber circuit implementing the analog system, the 2B1Q system and the ping-pong system, a signal processing unit is divided into a signal output unit for outputting a signal for transmission and a bias unit for providing a voltage, the signal output unit being implemented by an amplifier unit characterized by a low withstand voltage and a broadband characteristic, and the bias unit is implemented by an amplifier unit characterized by a high withstand voltage and a narrowband characteristic.
摘要翻译：在实现模拟系统，2B1Q系统和乒乓系统的用户电路中，信号处理单元被分成用于输出用于传输的信号的信号输出单元和用于提供电压的偏置单元，所述信号输出单元由具有低耐受电压和宽带特性的放大器单元实现，偏置单元由具有高耐受电压和窄带特性的放大器单元实现。

6. 发明授权

US5311518A ISDN interface circuit and system using the same 失效
标题翻译： ISDN接口电路和系统使用相同
公开(公告)号：US5311518A
公开(公告)日：1994-05-10
申请号：US684272
申请日：1991-04-12
申请人： Kenji Takato , Yozo Iketani , Takashi Sato , Hiroyuki Ujiie , Seiji Miyoshi
发明人： Kenji Takato , Yozo Iketani , Takashi Sato , Hiroyuki Ujiie , Seiji Miyoshi
IPC分类号： H04M19/00 , H04Q5/00 , H04Q11/04 , H04J3/12
CPC分类号： H04M19/005 , H04Q11/0471 , H04Q2213/08
摘要： An ISDN interface circuit is provided which is coupled to a terminal device via a transmission line and a reception line, the transmission line being formed of a pair of first and second wires, and the reception line being formed of a pair of third and fourth wires. The ISDN interface circuit includes a first resistor and a second resistor connected in series at a first node and between the first and second wires of the transmission line, and a third resistor and a fourth resistor connected in series at a second node and between the third and fourth wires of the reception line. The ISDN interface circuit also includes a D.C. power source connected to one of the first node, at which the first resistor and the second resistor are mutually connected in series and the second node, at which the third resistor and the fourth resistor are mutually connected in series. One of the first node and the second node, other than the above-mentioned one of the first node and the second node connected to the D.C. power source, is grounded.
摘要翻译：提供了一种ISDN接口电路，其经由传输线和接收线耦合到终端设备，所述传输线由一对第一和第二布线形成，并且所述接收线由一对第三和第四布线。 ISDN接口电路包括第一电阻器和第二电阻器，第一电阻器和第二电阻器在第一节点处串联连接在传输线路的第一和第二导线之间，第三电阻器和第四电阻器在第二节点处串联连接，和接收线的第四根线。 ISDN接口电路还包括连接到第一节点之一的DC电源，第一节点与第一电阻器和第二电阻器串联相互连接，第二节点在第二节点处连接第三电阻器和第四电阻器系列。除了连接到直流电源的第一节点和第二节点之一之外，第一节点和第二节点之一是接地的。

7. 发明授权

US5113426A Ground fault detector 失效
标题翻译：地面故障检测器
公开(公告)号：US5113426A
公开(公告)日：1992-05-12
申请号：US573130
申请日：1990-09-19
申请人： Kazumi Kinoshita , Kenji Takato , Toshiro Tojo
发明人： Kazumi Kinoshita , Kenji Takato , Toshiro Tojo
IPC分类号： H04M3/30 , H04M19/00
CPC分类号： H04M19/008 , H04M19/006 , H04M3/30
摘要： In a ground fault detector for long distance subscriber lines accommodated in a small capacity digital electronic exchange, a DC/DC converter for power supply is stopped during detection of ground fault. Upon reception of the stop signal, the DC/DC converter converts the power supply voltage for the subscribers to a voltage as the system power supply of the exchange, namely to a low voltage before voltage conversion of the DC/DC converter. The battery feed circuit can maintain the alarm condition, even if a current flows continuously to the battery feed resistor due to a ground fault, until the ground fault is recovered by the maintenance person without breaking the resistor.
摘要翻译： PCT No.PCT / JP90 / 00036 Sec。 371 1990年9月19日第 102（e）1990年9月19日PCT PCT 1990年1月12日PCT公布。出版物WO90 / 08441 日期：1990年7月26日。在容纳在小容量数字电子交换机中的长距离用户线路的接地故障检测器中，在接地故障检测期间停止用于电源的DC / DC转换器。在接收到停止信号时，DC / DC转换器将用户的电源电压转换为电压作为交换机的系统电源，即在DC / DC转换器的电压转换之前为低电压。即使电流由于接地故障而连续流向电池供电电阻，电池供电电路也可以保持报警状态，直到维护人员接地故障恢复，而不会中断电阻。

8. 发明授权

US4862309A Protection circuit for battery feed circuit 失效
标题翻译：电池供电电路保护电路
公开(公告)号：US4862309A
公开(公告)日：1989-08-29
申请号：US207635
申请日：1988-06-16
申请人： Toshiro Tojo , Kenji Takato , Kazumi Kinoshita , Yuzo Yamamoto
发明人： Toshiro Tojo , Kenji Takato , Kazumi Kinoshita , Yuzo Yamamoto
IPC分类号： H02H9/02 , H04M3/18 , H04M19/00
CPC分类号： H04M3/18 , H02H9/025 , H04M19/001
摘要： A protection circuit for a battery feed circuit used in a switching system. The protection circuit is comprised of: a supervising circuit for detecting an abnormal current flowing through a battery feed resistor; and a voltage limiting circuit for clamping a voltage across the battery feed resistor when the abnormal current is detected. Further, a control circuit is employed for stopping an operational amplifier, which is a component of a conventional battery feed circuit, when the abnormal current is detected.

9. 发明授权

US4827505A Subscriber line interface circuit 失效
标题翻译：用户线接口电路
公开(公告)号：US4827505A
公开(公告)日：1989-05-02
申请号：US897914
申请日：1986-08-19
申请人： Kenji Takato , Toshiro Tojo , Yozo Iketani , Mitsutoshi Ayano , Kiyoshi Shibuya
发明人： Kenji Takato , Toshiro Tojo , Yozo Iketani , Mitsutoshi Ayano , Kiyoshi Shibuya
IPC分类号： H04Q1/28 , H04M19/00 , H04M3/22
CPC分类号： H04M19/005
摘要： A subscriber line interface circuit receives and twice inverts currents from a 2-wire subscriber line and returns the currents to the subscriber line so longitudinal input impedance is low. Any differential input current in the subscriber lines is bypassed by a capacitor, so differential input impedance is very high. The circuit also sends a signal current from one system having one ground to another system having a different ground through one current path, while sending another current, having a phase opposite and amplitude equal to the signal current, through another path. This effectively isolates the two systems having different grounds.
摘要翻译：用户线路接口电路接收来自2线用户线的两次反相电流，并将电流返回给用户线，因此纵向输入阻抗较低。用户线路中的任何差分输入电流都被电容器旁路，因此差分输入阻抗非常高。该电路还通过一个电流通路将具有一个地的一个系统的信号电流发送到另一个具有不同接地的系统，同时通过另一路径发送具有与信号电流相反的幅度的另一个电流。这有效地隔离了具有不同理由的两个系统。

10. 发明授权

US4827503A Integrated ringing circuit and a ring trip circuit for the same 失效
标题翻译：集成振铃电路和环路跳闸电路相同
公开(公告)号：US4827503A
公开(公告)日：1989-05-02
申请号：US110460
申请日：1987-10-20
申请人： Kenji Takato , Kazumi Kinoshita , Toshiro Tojo , Yuzo Yamamoto
发明人： Kenji Takato , Kazumi Kinoshita , Toshiro Tojo , Yuzo Yamamoto
IPC分类号： H04M19/02 , H04M1/66
CPC分类号： H04M19/026 , H04M19/023
摘要： A constant current circuit, including a constant current source which draws a current and a constant current source which sends a current, is connected to a two-wire subscriber line. A ringing signal made up of constant stream of positive and negative current signals is transmitted to the telephone line. The OFF-hook condition of a telephone set is detected by comparing the output voltage of a constant current circuit with a reference voltage for ring trip.
摘要翻译：一个恒流电路，包括一个电流源和一个恒定的电流源，它产生一个电流，连接到两线用户线。由正和负电流信号的恒定流组成的振铃信号被发送到电话线。通过将恒流电路的输出电压与环路跳闸的参考电压进行比较来检测电话机的摘机状态。

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