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. 发明专利

JPS59161172A Call current supplying circuit 失效
标题翻译：呼叫电流供电电路
公开(公告)号：JPS59161172A
公开(公告)日：1984-09-11
申请号：JP3553683
申请日：1983-03-04
申请人： Fujitsu Ltd , Hitachi Ltd , Nec Corp , Nippon Telegr & Teleph Corp , Oki Electric Ind Co Ltd
发明人： UEKI ISAMU , MORIZAKI SHIGEKI , KIMURA TADAKATSU , TAWARA TOSHIYUKI , KITANO JIYUNJIROU , HASEGAWA KENZOU
IPC分类号： H04M19/00
CPC分类号： H04M19/005
摘要： PURPOSE:To supply stably a call current even in case of an area in which a call current is small, and to make a device small-sized by a conversion to an IC, by turning on and off a feedback loop for comparing a constant-current and a detecting current, by a control signal. CONSTITUTION:A pair of detecting circuits 16, 17 convert each voltage between connecting terminals 12, 13 to a subscriber's circuit and a DC power source 22 to a current by resistances 23, 24 and current mirror circuits 25, 26 and the converted current is supplied to an adding circuit 18, further an output current of the adding circuit 18 and a current of a constant-current source 19 are supplied to a feedback circuit 20 having a feedback loop, and this feedback loop is turned on and off by a control signal from a controlling circuit 29. When the feedback loop is turned off, a constant resistance feed by which a feed resistance of DC feeding circuits 14, 15 becomes constant is obtained, and in case the feedback loop is turned on, in an area in which a call current is small, a constant voltage feed by which voltage between the terminals 12, 13 becomes constant is obtained.
摘要翻译：目的：即使在呼叫电流小的区域的情况下也能稳定地提供呼叫电流，并且通过转换到IC来使设备小型化，通过接通和关闭用于比较恒定电流的反馈回路，电流和检测电流，由控制信号。构成：一对检测电路16,17将电阻23,24和电流镜电路25,26之间的连接端子12,13之间的每个电压转换成用户电路和直流电源22，并提供转换的电流对于加法电路18，另外将加法电路18的输出电流和恒流源19的电流提供给具有反馈回路的反馈电路20，并且该反馈回路由控制信号导通和关断当控制电路29断开时，获得DC供电电路14,15的馈电电阻变为恒定的恒定电阻馈电，并且在反馈回路接通的情况下，在其中通话电流小，可以获得端子12,13之间的电压恒定的恒定电压馈送。

2. 发明专利

JPS59161193A Two wire-four wire conversion circuit 失效
标题翻译：两线四线转换电路
公开(公告)号：JPS59161193A
公开(公告)日：1984-09-11
申请号：JP3457883
申请日：1983-03-04
申请人： Fujitsu Ltd , Hitachi Ltd , Nec Corp , Nippon Telegr & Teleph Corp , Oki Electric Ind Co Ltd
发明人： KITANO JIYUNJIROU , OOHIGATA ICHIROU , HAYASHI TOSHIO , KIMURA TADAKATSU , TAWARA TOSHIYUKI , UEKI ISAMU , TAKADA KENZOU
IPC分类号： H04B3/03 , H04B1/58 , H04M19/00 , H04Q3/42
CPC分类号： H04B1/58
摘要： PURPOSE:To hold the good characteristic of a subscriber's circuit, also to simplify the configuration of a circuit, and to realize an IC constitution by executing the processing for cancelling a leakage signal by a current mode. CONSTITUTION:A terminal impedance ZL of two-wire side terminals (A, B) is determined in proportion to an impedance 14 by a negative feedback loop of a differential signal detector 1 - a voltage-current transducer 12 - a current amplifier 6. In this way, basing on mismatching of the impedance ZL and 14, a leakage signal to the transmitting side from the receiving side is cancelled by a current generated in a series circuit of a balance impedance 19 and an artificial terminal impedance.
摘要翻译：目的：为了保持用户电路的良好特性，也简化电路的配置，并且通过执行通过当前模式来消除泄漏信号的处理来实现IC结构。构成：两线侧端子（A，B）的端子阻抗ZL通过差分信号检测器1的负反馈环路 - 电压 - 电流传感器12--电流放大器6，与阻抗14成比例地确定。以这种方式，基于阻抗ZL和14的不匹配，通过在平衡阻抗19的串联电路中产生的电流和人造端子阻抗来消除从接收侧到发送侧的泄漏信号。

3. 发明专利

JPS598463A Grounding detection circuit 失效
标题翻译：接地检测电路
公开(公告)号：JPS598463A
公开(公告)日：1984-01-17
申请号：JP11675782
申请日：1982-07-07
申请人： Fujitsu Ltd , Hitachi Ltd , Nec Corp , Nippon Telegr & Teleph Corp , Oki Electric Ind Co Ltd
发明人： KITANO JIYUNJIROU , OOHIGATA ICHIROU , HAYASHI TOSHIO , TAWARA TOSHIYUKI , UEKI ISAMU , USAMI TAKASHI
IPC分类号： H04M19/00 , H04Q3/00
CPC分类号： H04Q3/00
摘要： PURPOSE:To attain the detection with high accuracy using the same grounding detection resistor and to apply this circuit with IC constitution, by compensating a difference of the grounding detection resistor based on the difference of a grounding current due to use/non-use state of a terminal, by a load current output. CONSTITUTION:A detecting voltage proportional to a current difference IA-IB between a battery line current IA and a grounding line current IB is applied from a current difference detecting circuit 7 to a comparison circuit, and a voltage difference subtracting a detected voltage proportional to a load current IL out of a reference voltage VREF is applied from a circuit 11 to the comparison circuit 8, respectively. The circuit 8 generates an inverted grounding detecting output when the comparison input is larger than a reference input. Further, the grounding detecting resistor is made the same independently of the use/non-use state of the terminal 1 by determining the decrease compensating component of a grounding current IG depending on the usage state of a subscriber terminal 1 to a prescribed value.
摘要翻译：目的：使用相同的接地检测电阻器以高精度实现检测，并通过IC结构应用该电路，通过基于由于使用/不使用状态引起的接地电流的差异来补偿接地检测电阻器的差异一个终端，通过负载电流输出。构成：将电流线电流IA与接地线电流IB之间的电流差IA-IB成比例的检测电压从电流差检测电路7施加到比较电路，减去与参考电压VREF中的负载电流IL分别从电路11施加到比较电路8。当比较输入大于参考输入时，电路8产生反相接地检测输出。此外，通过根据用户终端1的使用状态确定接地电流IG的减小补偿分量至规定值，使接地检测电阻器与终端1的使用/不使用状态无关。

4. 发明专利

JPS59161192A Dc bias dependability eliminating circuit 失效
标题翻译： DC偏置可靠性消除电路
公开(公告)号：JPS59161192A
公开(公告)日：1984-09-11
申请号：JP3438283
申请日：1983-03-04
申请人： Nippon Telegr & Teleph Corp , Oki Electric Ind Co Ltd
发明人： TAWARA TOSHIYUKI , UEHARA HIROYASU , HAYASHI TOSHIO
IPC分类号： H04Q3/42 , H04M19/00
CPC分类号： H04M19/005
摘要： PURPOSE:To eliminate DC bias dependability peculiar to a semiconductor in case of circuit integration by applying a constant-current bias to a part for receiving a signal by DC direct-coupling. CONSTITUTION:Current mirror circuits Ac, Bc receive through a resistance R1 a signal from a subscriber's terminal generated in terminals A, B, and the output is brought to current-voltage conversion by an emitter resistance RV signal converting transistors QTN, QTP, and outputted to voltage output terminals VOA, VOB. The bases of TRs QTN, QTP are connected to reference power sources VX, VY. Also, the collectors of TRs QTN, QTP are connected to current output terminals IOA, IOB, and a current proportional to voltage between the terminals A, B and a battery or a ground is outputted. In this case, constant-current sources IA, IB are connected to the emitters of the TRs QTN, QTP. In this way, DC bias dependability peculiar to a semiconductor by an integration can be eliminated, a load current is varied for a time, and it is utilized in case of circuit integration in which the allowance of characteristic variation is strict.
摘要翻译：目的：为了消除通过对通过DC直流耦合接收信号的部件施加恒定电流偏压来进行电路集成的半导体特有的DC偏置可靠性。构成：电流镜电路Ac，Bc通过电阻R1接收来自端子A，B中产生的用户终端的信号，并且通过发射极电阻RV信号转换晶体管QTN，QTP将输出转换为电流电压转换，并输出到电压输出端子VOA，VOB。 TRS QTN，QTP的基极连接到参考电源VX，VY。此外，TRs QTN，QTP的集电极连接到电流输出端子IOA，IOB，并且输出与端子A，B和电池或接地之间的电压成比例的电流。在这种情况下，恒流源IA，IB连接到TRs QTN，QTP的发射极。以这种方式，可以消除通过集成对半导体特有的DC偏置可靠性，一段时间内改变负载电流，并且在特性变化的容限严格的电路集成的情况下被使用。

5. 发明专利

JPS59161171A In-phase noise eliminating circuit 失效
标题翻译：同相噪声消除电路
公开(公告)号：JPS59161171A
公开(公告)日：1984-09-11
申请号：JP3462783
申请日：1983-03-04
申请人： Nippon Telegr & Teleph Corp , Oki Electric Ind Co Ltd
发明人： YAMAGUCHI TAKASHI , TAWARA TOSHIYUKI , KIMURA TADAKATSU , HAYASHI TOSHIO
IPC分类号： H04M19/00
CPC分类号： H04M19/005
摘要： PURPOSE:To simplify the constitution of a subscriber's circuit, and to eliminate sufficiently an in-phase noise using a semiconductor element, by providing a pair of current supplying circuits for supplying a current to a pair of subscriber's lines, a current-voltage converting circuit, and an in-phase voltage detecting and controlling circuit, etc. CONSTITUTION:A current is supplied to a subscriber's line 2 having a pair of subscriber's lines A, B from a pair of current supplying circuits 6, 7, converted to a signal current on the subscriber's lines A, B by a voltage-current converting circuit 5, and the sum current is fetched. The sum current from this circuit 5 is made to flow to a circuit network 9, and voltage being proportional to an in-phase portion of the signal on the subscriber's lines A, B is generated. Basing on the voltage being proportional to the in-phase portion of the signal on the subscriber's line A, B from this circuit network 9, the current supplying circuits 6, 7 are controlled from the in-phase voltage detecting and controlling circuit 8. In this way, an in-phase noise eliminating circuit is mainly constituted of a semiconductor element, and the in-phase noise is eliminated sufficiently by a simple constitution.
摘要翻译：目的：为了简化用户电路的结构，并且利用半导体元件充分消除同相噪声，通过提供一对用于向一对用户线路提供电流的电流供应电路，电流 - 电压转换电路，以及同相电压检测和控制电路等。构成：将电流从一对电流供给电路6,7供给到具有一对用户线路A，B的用户线路2，转换为信号电流通过电压 - 电流转换电路5在用户线路A，B上获取总和电流。使来自该电路5的和电流流向电路网络9，并且生成与用户线A，B上的信号的同相部分成比例的电压。基于与来自该电路网络9的用户线A，B上的信号的同相部分成比例的电压，从同相电压检测和控制电路8控制电流供应电路6,7。这样，同相噪声消除电路主要由半导体元件构成，并且通过简单的结构可以充分消除同相噪声。

6. 发明专利

JPS58106939A CALL SIGNAL TRANSMITTING CIRCUIT 失效
公开(公告)号：JPS58106939A
公开(公告)日：1983-06-25
申请号：JP20507681
申请日：1981-12-21
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE , NIPPON ELECTRIC CO , HITACHI LTD , FUJITSU LTD
发明人： TAWARA TOSHIYUKI , HAMASATO KAZUO , INABE YASUNOBU , OONO MASAHIKO , ENAMI SHIROU , HASEGAWA KENZOU
IPC分类号： H04M3/02 , H03K17/73 , H04M3/06
摘要： PURPOSE:To stabilize a call signal, by detecting opening or closing of semiconductor switches and using an exclusive operating circuit to prevent the simultaneous operation in a circuit for transmission of the call signal to a subscriber's terminal of a telephone exchange. CONSTITUTION:Conduction or nonconduction of p-n-p-n transistors TRs 11a, 11b, 12a, and 12b constituting semiconductor switches is detected by a detecting circuit 13c, and the detection output is transmitted as one of control information to a controlling circuit 14, and an exclusive opeating circuit 13 for delay circuits 13a and 13b having delay times longer than the turn-off time of p-n-p-n TRs 11a, 11b, 12a, and 12b is used to prevent the simultaneous operation of two semiconductor switches 11 and 12. Consequently, a stable circuit is obtained where a call signal source 5 and the earth do not collide.

7. 发明专利

JPS5890817A SIGNAL TRANSMISSION CIRCUIT 失效
公开(公告)号：JPS5890817A
公开(公告)日：1983-05-30
申请号：JP18796781
申请日：1981-11-24
申请人： NIPPON TELEGRAPH & TELEPHONE , NIPPON ELECTRIC CO , HITACHI LTD , OKI ELECTRIC IND CO LTD , FUJITSU LTD
发明人： HAYASHI TOSHIO , KAWARADA KUNIYASU , UEKI ISAMU , KITANO JIYUNJIROU , TAWARA TOSHIYUKI , TAKADA KENZOU
IPC分类号： H04L25/02 , H03H11/02 , H03H11/38
摘要： PURPOSE:To attain high-density circuit integration, by constituting a coupling circuit with two current mirror circuits. CONSTITUTION:When a signal Sa is outputted through an output terminal 3a from a circuit A, a current flows to a closed loop of power supply 6a common terminal 5a an output terminal 3a of the circuit A a coupling circuit M a power supply 6a, and flows through an input terminal 2c and a common terminal 5c of a current mirror circuit Ha in the coupling circuit. Then, the current flows to a path of power supply 6b 5c of current mirror circuit Hb 2c of current mirror circuit Hb, and a signal current flows from an output terminal 3c of the current mirror circuit Hb to a circuit B. Thus, two circuits driven with different power supplies having different ground points can be coupled.

8. 发明专利

JPS5899061A IN-PHASE NOISE SUPPRESSION CIRCUIT 失效
公开(公告)号：JPS5899061A
公开(公告)日：1983-06-13
申请号：JP19695081
申请日：1981-12-09
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE , NIPPON ELECTRIC CO , HITACHI LTD , FUJITSU LTD
发明人： TAWARA TOSHIYUKI , KATAOKA MUTSUO , HAYASHI TOSHIO , UEKI ISAMU , KITANO JIYUNJIROU , TAKADA KENZOU
IPC分类号： H04M19/00 , H04Q3/42 , H04Q3/72
摘要： PURPOSE:To avoid the saturation of semiconductor elements for reception due to in-phase noise, by suppressing the in-phase noise produced on a subscriber line before the detection of a signal at a subscriber terminal, in the subscriber circuit of an exchange. CONSTITUTION:An in-phase noise suppression circuit 30 detects in-phase noise only in components of voltages VA, VB at terminals A, B from a subscriber line 50, and controls current supply circuits 10, 20 and sufficiently suppresses the in-phase noise so as to decrease the impedance of the circuits 10, 20. Thus, the peak value of the voltages VA, VB produced at the terminals A, B can be suppressed to the range of unsaturation voltage of a differential signal reception circuit 40 receiving a subscriber signal. The circuit 40 individually detects a balanced signal VL of the subscriber terminal signal as the voltage at the terminals A, B and transmits it as an unbalanced signal Vr through voltage summation.

9. 发明专利

JPS56122569A BOOSTER SYSTEM 失效
公开(公告)号：JPS56122569A
公开(公告)日：1981-09-26
申请号：JP2642480
申请日：1980-03-03
申请人： FUJITSU LTD , NIPPON TELEGRAPH & TELEPHONE , OKI ELECTRIC IND CO LTD , NIPPON ELECTRIC CO , HITACHI LTD
发明人： YOSHINO HARUYUKI , HAMASATO KAZUO , TAWARA TOSHIYUKI , OONO MASAHIKO , KOUNO TETSUYA
IPC分类号： H04M19/00
摘要： PURPOSE:To simplify the booster power supply connection control, by detecting a service current supplied to a telephone set, and operating the switch for connecting the booster power supply in case when said current value is smaller than the normal value. CONSTITUTION:The circuits from telephone sets S1-Sn are concentrated by the space division type line concentration stage channel network SDNW, attain to the line circuit trunks LCT1-LCTm, also the switching connection among the LCT1- LCTn is executed by the switching stage channel network NW, and switching is executed among the telephone sets S1-Sn. The telephone sets receive a service current, a calling current, etc. from the LCT1-LCTm. When the telephone set S is in an off-hook state, the service current flows through the route of the current supply circuit PF1, the diode D1, the telephone set S, the current supply circuit PF0, the resistor r1, the supply electric source -VG, and its existence is detected by the detection circuit DET0. Also, whether magnitude of the service current satisfies the normal value or not is detected by the detection circuit DET1. If it is detected by the circuit DET1 that the service current does not reach the normal value, the switch SW conducts, it is connected by the booster power supply +VB, and the service current to the telephone set S is increased.

10. 发明专利

JPS58104558A FULL ELECTRONIC SUBSCRIBER CIRCUIT 失效
公开(公告)号：JPS58104558A
公开(公告)日：1983-06-22
申请号：JP20402681
申请日：1981-12-17
申请人： NIPPON TELEGRAPH & TELEPHONE , NIPPON ELECTRIC CO , HITACHI LTD , OKI ELECTRIC IND CO LTD , FUJITSU LTD
发明人： HAYASHI TOSHIO , KAWARADA KUNIYASU , UEKI ISAMU , KITANO JIYUNJIROU , TAWARA TOSHIYUKI , TAKADA KENZOU
IPC分类号： H04Q3/42 , H04M19/00
摘要： PURPOSE:To connect subscribers to CODECs operated in + or -5V power supply system directrly, by outputting 4-wire transmission signals with a low output impedance through a current and voltage conversion of a differential amplifier comprising operational amplifiers. CONSTITUTION:Circuits 16, 17 transmit and receive current mode signals, then the circuits are not subject to the effect of noise and potential difference between earth G and analog earth E, and common mode noise appeared at 2- wire subscriber lines is suppressed with a common mode signal suppressing function of a differential amplifier 40 comprising operational amplifiers, and the differential amplifier 40 acts like the current voltage conversion, allowing to output 4-wire transmission signals with a low output impedance. Thus, the performance of connection to other elements such as CODECs can be improved.

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