专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 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。

2. 发明授权

US4995111A Ring trip circuit for subscriber telephone 失效
标题翻译：用户电话的环路跳闸电路
公开(公告)号：US4995111A
公开(公告)日：1991-02-19
申请号：US320297
申请日：1989-02-21
申请人： Toshiro Tojo , Kenji Takato , Kazumi Kinoshita , Yuzo Yamamoto , Yozo Iketani , Shin-ichi Ito
发明人： Toshiro Tojo , Kenji Takato , Kazumi Kinoshita , Yuzo Yamamoto , Yozo Iketani , Shin-ichi Ito
IPC分类号： H04M19/02
CPC分类号： H04M19/026
摘要： An improved ring trip circuit for a subscriber telephone, for detecting an on-hook state or an off-hook state of the telephone. The ring trip circuit can be formed in a small size and can be formed by a LSI. The ring trip circuit includes a voltage detecting circuit (2), for detecting a voltage difference (.DELTA.V) between both ends of a ringer sending resistor, having a first circuit (S1, S2, A1.about.B3) converting the voltage difference to a current difference, and further having a second circuit (F) converting the current difference to a voltage, the voltage difference varying in response to the on-hook state or the off-hook state of the telephone, and a state detecting circuit (3) for detecting the on-hook state or the off-hook state in response to a value of the voltage from the voltage detecting circuit. The voltage detecting circuit is formed by a plurality of current mirror circuits, each of which includes at least two transistors. The state detecting circuit includes a comparator circuit (CP1) formed by a plurality of transistors.
摘要翻译： PCT No.PCT / JP88 / 00607 Sec。 371日期1989年2月21日 102（e）日期1989年2月21日PCT Filed 1988年6月18日PCT Pub。出版物WO88 / 10542 日期为1988年12月29日。一种用于用户电话的改进的环路跳闸电路，用于检测电话的挂机状态或摘机状态。环形跳闸电路可以形成为小尺寸并且可以由LSI形成。环路跳闸电路包括电压检测电路（2），用于检测振铃发送电阻器两端之间的电压差（DELTA V），该电路具有将电压差转换为a的第一电路（S1，S2，A1差分B3）并且还具有将电流差转换为电压的第二电路（F），所述电压差响应于电话的挂机状态或摘机状态而变化，以及状态检测电路（3）用于响应于来自电压检测电路的电压的值来检测挂机状态或摘机状态。电压检测电路由多个电流镜电路形成，每个电流镜电路包括至少两个晶体管。状态检测电路包括由多个晶体管形成的比较器电路（CP1）。

3. 发明授权

US4748659A Calling signal transmission apparatus 失效
标题翻译：呼叫信号传输装置
公开(公告)号：US4748659A
公开(公告)日：1988-05-31
申请号：US904495
申请日：1986-09-08
申请人： Kiyoshi Kasahara , Kenichi Ogawa , Kenji Takato , Shoji Nojiri , Yoshimi Iijima , Yasuo Miyazaki , Mitsutoshi Ayano , Kiyoshi Shibuya , Atsuo Serikawa
发明人： Kiyoshi Kasahara , Kenichi Ogawa , Kenji Takato , Shoji Nojiri , Yoshimi Iijima , Yasuo Miyazaki , Mitsutoshi Ayano , Kiyoshi Shibuya , Atsuo Serikawa
IPC分类号： H04M19/02
CPC分类号： H04M19/026
摘要： In a calling signal transmitting apparatus, a ring trip equipment, including a ring trip detecting circuit for detecting a ring trip signal in response to an off-hook operation of the telephone set during a signal state of an intermittent ringing signal and a loop detecting circuit for detecting a loop signal in response to an off-hook operation of the telephone set during a nonsignal state of the intermittent ringing signal. Also included are a logical OR gate circuit, for providing, as a status signal, a logical sum of the ring trip signal and the loop signal, and a supervising circuit for supervising the status signal. When an incoming call is being received by the telephone set, when the supervising circuit detects an off-hook state in the status signal, the supervising circuit stops the transmission of a ringing signal to the telephone set, and carries out a second supervising operation for supervising the status signal, and, if an on-hook state is detected during the second supervising operation, said supervising circuit again transfers the ringing signal to the telephone set.
摘要翻译：在呼叫信号发送装置中，环路跳闸设备包括环路跳闸检测电路，用于在间歇振铃信号的信号状态期间响应于电话机的摘机操作来检测环路跳闸信号，以及环路检测电路用于在间歇振铃信号的非信号状态期间响应于电话机的摘机操作来检测回路信号。还包括逻辑或门电路，用于提供环路跳闸信号和环路信号的逻辑和作为状态信号，以及用于监视状态信号的监控电路。当电话机接收到来电时，当监控电路在状态信号中检测到摘机状态时，监控电路停止向电话机发送振铃信号，并执行第二监视操作监视状态信号，并且如果在第二监视操作期间检测到挂机状态，则所述监控电路再次将振铃信号传送到电话机。

4. 发明授权

US4631366A Battery feed circuit for subscriber line 失效
标题翻译：用户线电池供电电路
公开(公告)号：US4631366A
公开(公告)日：1986-12-23
申请号：US736345
申请日：1985-05-21
申请人： Kenji Takato , Mitsutoshi Ayano , Kiyoshi Shibuya , Yoshimi Iijima , Atsuo Serikawa
发明人： Kenji Takato , Mitsutoshi Ayano , Kiyoshi Shibuya , Yoshimi Iijima , Atsuo Serikawa
IPC分类号： H04M19/00
CPC分类号： H04M19/005
摘要： A battery feed circuit for a subscriber line includes first and second feed circuit parts, each supplying a constant current to a corresponding subscriber line. The first and second feed circuit parts are provided with at least one of a common mode noise suppressor and a power source noise suppressor. The common mode noise suppressor includes first and second reference voltage output circuits and an intermediate voltage output circuit to produce the voltage between the first and second subscriber lines and superpose the same onto the first and second reference voltages. The power source noise suppressor functions to cancel the power source noise voltage at the output, of the first and second feed circuit parts.
摘要翻译：用于用户线路的电池馈电电路包括第一和第二馈电电路部分，每个馈电电路部分向相应的用户线路提供恒定电流。第一和第二馈电电路部分设置有共模噪声抑制器和电源噪声抑制器中的至少一个。共模噪声抑制器包括第一和第二参考电压输出电路和中间电压输出电路，以产生第一和第二用户线之间的电压并将其叠加到第一和第二参考电压上。电源噪声抑制器用于消除第一和第二馈电电路部分的输出端的电源噪声电压。

5. 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。

6. 发明授权

US4982422A Terminating circuit in a battery feed circuit of an electronic exchange system 失效
标题翻译：电子交换系统的电池供电电路中的终端电路
公开(公告)号：US4982422A
公开(公告)日：1991-01-01
申请号：US409064
申请日：1989-09-19
申请人： Shin-ichi Itoh , Kenji Takato , Yozo Iketani , Yuzo Yamamoto
发明人： Shin-ichi Itoh , Kenji Takato , Yozo Iketani , Yuzo Yamamoto
IPC分类号： H04M19/00 , H04Q3/42
CPC分类号： H04M19/005
摘要： Disclosed is a terminating circuit in a battery feed circuit of an electronic exchange system. The battery feed circuit comprises two transconductance amplifiers connected by a coupling capacitor, for supplying a direct current through a ring terminal and a tip terminal to a load. Each of the transconductance amplifiers comprises an operational amplifier; a resistor connected between the output end of the operational amplifier and the tip terminal or the ring terminal, and an impedance unit connected between the inverting input terminal of the operational amplifier and the output end. The impedance unit has an impedance determined in such a way that the required terminating impedance of the battery feed circuit when viewed from the tip terminal and the ring terminal is formed only by the internal elements including the impedance means and the resistor, whereby an external larger-size capacitance capacitor for matching becomes unnecessary.

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

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。

10. 发明授权

US5128992A Hybrid circuit 失效
标题翻译：混合电路
公开(公告)号：US5128992A
公开(公告)日：1992-07-07
申请号：US565050
申请日：1990-08-09
申请人： Kenji Takato , Toshiro Tojo , Yuzo Yamamoto
发明人： Kenji Takato , Toshiro Tojo , Yuzo Yamamoto
IPC分类号： H04B3/03 , H04M1/58 , H04M19/00
CPC分类号： H04M19/005
摘要： A hybrid circuit which converts receiving side four-wire signals from a switching network into two-wire signals, supplies the same through line B and line A to a telephone terminal equipment, and converts two-wire signals supplied from the telephone terminal equipment through the line A and the line B to the switching network into transmitting side four-wire signals, including a pair of battery feeding and terminating resistors connected between power sources (GND and V.sub.BB) and the line B and line A and a receiving side mirror circuit and transmitting side mirror circuit both connected between the lines B and A.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式