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1. 发明专利

JPS5895461A OVERVOLTAGE PROTECTING CIRCUIT 失效
公开(公告)号：JPS5895461A
公开(公告)日：1983-06-07
申请号：JP19295081
申请日：1981-12-02
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE , OKI ELECTRIC IND CO LTD , NIPPON ELECTRIC CO , FUJITSU LTD
发明人： KITANO JIYUNJIROU , OOHIGATA ICHIROU , OIKAWA YOSHINORI , NANBA SHINJI , OONO MASAHIKO , TAKADA KENZOU
IPC分类号： H04M19/00
摘要： PURPOSE:To protect an electronic current supply circuit from an overvoltage, by providing a means, which controls the current supply to terminals, and a means, which detects the overvoltage to control the turn-on/off of the current supply and prevents the reverse current from a subscriber's line to the current supply circuit, between lines of subscribers. CONSTITUTION:In the telephone exchange system, a current is supplied from an exchange (c) to the telephone set of a subscriber terminal (a) through a subscriber's line (b) consisting of lines A and B. In the normal operation, the potential at a point A'' of a current supply circuit 1 is 0-VBB volt, and the potential at a point B'' is 0-VBB/2 volt. When an overvoltage is applied to lines A and B, potentials of lines A' and B' in the exchange are restrained to 200- 400V by the clamp function of a triode discharge tube GL, and the overvoltage is not transmitted to the current supply circuit 1 by diodes 8 and 9 of a reverse current preventing rectifier couple 3. Points A'' and B'' are monitored by an overvoltage detecting circuit 2; and when potential at these points become a positive voltage or a voltage lower than VBB/2, the current supply circuit 1 is controlled to be turned off by the detection output.

2. 发明专利

JPS5870693A CONSTITUTING SYSTEM FOR RECEIVER FOR COIN DISCRIMINATING SIGNAL 失效
公开(公告)号：JPS5870693A
公开(公告)日：1983-04-27
申请号：JP16792981
申请日：1981-10-22
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE , NIPPON ELECTRIC CO , HITACHI LTD , FUJITSU LTD
发明人： NANBA SHINJI , KOINUMA TAKEO , OONO MASAHIKO , OOTSUKI KENICHI , YOSHINO HARUYUKI
IPC分类号： H04M15/00 , H04M17/02
摘要： PURPOSE:To attain small size, light weight and economy of a receiver for coin discriminating signal, by providing the receiver for coin discrimination for 4-wire side, through the use of a hybrid transformer. CONSTITUTION:When a coin discrimination signal from a public telephone set 1 is transmitted to a subscriber circuit via a subscriber line, the circuit executes two-four wire conversion and balanced/unbalanced conversion of the signal in a hybrid transformer 21 and the result is given to a receiver 23. When the signal is received at the receiver 23, the signal is terminated at a termination circuit 22, a detection circuit 4 performs coin discrimination for required control. The coin discrimination signal terminated is suppressed through the operation of a block circuit 5 and no signal is given to the succeeding stages. Audio signals are terminated in high impedance at the termination circuit 22 and transmitted to succeeding stages without being suppressed at the block circuit 5.

3. 发明专利

JPS60182252A RESPONSE DETECTING SYSTEM 失效
公开(公告)号：JPS60182252A
公开(公告)日：1985-09-17
申请号：JP3607284
申请日：1984-02-29
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE , OKI ELECTRIC IND CO LTD , NIPPON ELECTRIC CO , FUJITSU LTD
发明人： ENAMI SHIROU , ISHIZAWA AKIRA , NANBA SHINJI , OONO MASAHIKO , KAMATA TSUKASA
IPC分类号： H04M19/00 , H04M3/06 , H04M19/02
摘要： PURPOSE:To attain ease of formation of LSI by supplying a signal to one end of a current supply circuit at the positive half cycle of a call signal so as to allow the current supply circuit to detect the response of a subscriber thereby eliminating the need for an exclusive response detecting circuit. CONSTITUTION:Switches S5, S6 are connected between the current supply circuit BS of the response detecting system and a telephone set TEL and a switch S4 is connected between the circuit BS of the switch S5 and the telephone set TEL of the switch S6. Furthermore, a parallel circuit of switches S1, S2 and a series circuit comprising a resistor RC and a signal source CR are connected to the telephone set TEL of the switch S5 and a series circuit comprising the switch S3, a resistor RD and a battery VBB is connected to the telephone set TEL side of the switch S6. Then a response detecting circuit DET is connected across a resistor RA of the circuit BS. In calling a subscriber, the switches S5, S6 are turned off, the switches S1-S4 are turned on so as to give the signal to one end of the circuit BS at the positive half cycle of the call signal, the respose of the subscriber is detected by the circuit BS to attain ease of formation of LSI.

4. 发明专利

JPS59228426A POWER-ON RESET CIRCUIT 失效
公开(公告)号：JPS59228426A
公开(公告)日：1984-12-21
申请号：JP10279683
申请日：1983-06-10
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： NANBA SHINJI , DEGUCHI FUMIHIKO
IPC分类号： H03K19/003 , H03K17/22
摘要： PURPOSE:To attain monolithic circuit integration by using an integration circuit using a switched capacitor filter for an integration circuit of a power-on reset circuit. CONSTITUTION:The power-on reset circuit is constituted by the switched capacitor filter 4 comprising a switch SW and capacitors C1, C2, a diode D, resistors R1, R2 and a comparator CMP. The time constant of the switched capacitor filter 4 becomes T.C2/C1, where T is the period of clock to be used, and the power-on reset time is given by the time constant and the voltage dividing ratio of the resistors R1, R2. Since the switched capacitor filter is used for the integration curcuit, the circuit is constituted by a monolithic IC.

5. 发明专利

JPS60182843A DETECTION SUPPRESSING SYSTEM 失效
公开(公告)号：JPS60182843A
公开(公告)日：1985-09-18
申请号：JP3738084
申请日：1984-03-01
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： NANBA SHINJI , EGAWA YUUICHI , HAGISHIMA KOUICHI , KOBAYASHI TOSHIROU
IPC分类号： H04M19/00
摘要： PURPOSE:To eliminate easily disturbance due to an induction radio wave by connecting a low impedance circuit between an emitter of a transistor (TR) of a talking current supply device using a current amplifier whose output stage consists of TRs and a common point. CONSTITUTION:A current amplifier whose output stage comprises TRs TrA, TrB is connected to current supply terminals A and B. The current amplifier consists of a power supply VBB, a 1/2VBB, operational amplifiers OPA, OPB, current mirrors CM1A, CM1B, CM2A, CM2B and the TRs TrA, TrB. Further, a series circuit comprising a resistor RA and a capacitor CA and a series circuit comprising a resistor RB and a capacitor CB showing a low impedance to a radio wave are connected between a common and bases of the TRs TrA, TrB. Thus, the induced disturbance of a broadcast radio wave and an AM-modulated radio wave is eliminated easily by the provision of the said circuits.

6. 发明专利

JPS5864816A GYRATOR 失效
公开(公告)号：JPS5864816A
公开(公告)日：1983-04-18
申请号：JP16345781
申请日：1981-10-15
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： KOMAZAKI TOMOKAZU , NANBA SHINJI , KOINUMA TAKEO
IPC分类号： H03H11/42
摘要： PURPOSE:To improve the dynamic range, by setting a resistance value of a resistor between output terminals, and a capacitance value of a capacitor between an output terminal of the 1st operational amplifier and a noninverting input terminal of the 2nd operational amplifier, to a prescribed value. CONSTITUTION:A resistor is used for an admittance connected between output terminals 2a and 2b and the resistance of the resistor is R. A capacitor (capacitance is C) is used for an admittance Y4 connected between an output terminal of the 1st operational amplifier 4 and a noninverting input terminal of the 2nd operational amplifier 5. Output voltages Vb, Va of operational amplifiers 4, 5 are expressed as equation 1. The absolute values¦Va¦and¦Vb¦ of the output voltages Va and Vb are as expressed in equation 2. Taking (1/omegaRC)

7. 发明专利

JPS607258A RING TRIP CIRCUIT 失效
公开(公告)号：JPS607258A
公开(公告)日：1985-01-16
申请号：JP11439883
申请日：1983-06-27
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： NANBA SHINJI , HAMASATO KAZUO
IPC分类号： H04M3/06 , H04M19/02
摘要： PURPOSE:To miniaturize and economize a ring trip circuit by changing a clock frequency only when an LPF of a codec is called so as to use the LPF to an LPF of the ring trip circuit. CONSTITUTION:An SW1 is changed over from the position of DECODER to the position of IN by the control of a controller (not shown) when an incoming call exists, and a call signal is applied to the LPF. An SW2 is change over to the position of CLK1 by the control of the said controller at the same time, a clock signal of the CLK1 is applied to the LPF so as to change it into the LPF for ring trip. In a sampled data filter such as switched capacitor filter or digital filter as known, the relation of proportional as F0=kfc (where k is a constant) exists between a pass band F0 and a clock frequency fc, and the clock frequency at ring trip is fc(16Hz/4Hz) fc/250 when the f0 of voice is 4kHz and the clock frequency for the case is fc, and the clock frequency can be nearly 1/250 to the fc.

8. 发明专利

JPS5864817A GYRATOR 失效
公开(公告)号：JPS5864817A
公开(公告)日：1983-04-18
申请号：JP16345881
申请日：1981-10-15
申请人： OKI ELECTRIC IND CO LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： KOMAZAKI TOMOKAZU , NANBA SHINJI , KOINUMA TAKEO
IPC分类号： H03H11/42 , H03H11/50
摘要： PURPOSE:To set the capacitance of a capacitor small and to increase the Q of an equivalent inductance, by using a resistor and a capacitor for each admittance of a gyrator circuit as specified. CONSTITUTION:Y4-Y8 are admittances of each element, 1-3 are nodes of this circuit, and V2, V3 are voltages at nodes 2 and 3 respectively. The relation between input terminals Vin and V2 of input terminals 1a, 1b and an output Vout of an operational amplifier 4 is expressed in equations 1 and 2. Thus, an input impedance Zin is expressed in equation 3. Where Y5Y7=Y6Y8 is satisfied, equation 3 is simplified into equation 4. Taking Y4=SC, Y5=1/R5 and Y8=1(that is, resistors R5, R8 are used for Y5, Y8 respectively and a capacitor C is used for Y4) in equation 4, a series circuit of R and L is obtained as given by equation 5. In equation 5, the resisters R5, R8 are included in the imaginary part and the capacitance value of the capacitor C can be set arbitrarily independently of the Q of the equivalent inductance to some extent. Thus, said Q can be increased.

9. 发明专利

JPS61113354A Subscriber circuit for public telephone set 失效
标题翻译：用于公共电话机的订户电路
公开(公告)号：JPS61113354A
公开(公告)日：1986-05-31
申请号：JP23445284
申请日：1984-11-07
申请人： Fujitsu Ltd , Hitachi Ltd , Nec Corp , Nippon Telegr & Teleph Corp , Oki Electric Ind Co Ltd
发明人： ONO MASAHIKO , ISHIZAWA AKIRA , NANBA SHINJI , ENAMI SHIRO , HASHIMOTO MAKOTO
IPC分类号： H04M15/00 , H04M19/00 , H04M19/08
CPC分类号： H04M19/08
摘要： PURPOSE:To attain miniaturization and high density mounting of the titled circuit by constituting a feeding circuit of electronic elements. CONSTITUTION:A normal feeding circuit 3a is turned on and a reverse feeding circuit 3b is turned off by control signals 4a, 4b at normal feeding, a talking current is given from a current supply circuit 8a to a subscriber line 1 and flows from a subscriber line 2 to the circuit 8a. On the other hand, the current flows from the current supply circuit 8b to the subscriber lines 1, 2 at reverse feeding. An output current I of a voltage/current converting circuit 5a in the normal feeding state is transmitted by a current transmission ratio by a current mirror circuit 7a. The talking current IL flowing to the subscriber lines 1, 2 depends on an equivalent DC resistance of the feeding circuit 3a.
摘要翻译：目的：通过构成电子元件的馈电电路来实现标称电路的小型化和高密度安装。构成：通常馈电电路3a接通，反馈电路3b在正常馈电时由控制信号4a，4b断开，通话电流从电流供给电路8a给予用户线路1并从用户流出线路2到电路8a。另一方面，在反向馈电时，电流从电流供给电路8b流向用户线路1,2。正常馈电状态下的电压/电流转换电路5a的输出电流I由电流镜电路7a通过电流传输比传输。流到用户线路1,2的通话电流IL取决于馈电电路3a的等效直流电阻。

10. 发明专利

JPS59161198A Terminal control system 失效
标题翻译：终端控制系统
公开(公告)号：JPS59161198A
公开(公告)日：1984-09-11
申请号：JP3458083
申请日：1983-03-04
申请人： Hitachi Ltd , Nippon Telegr & Teleph Corp , Oki Electric Ind Co Ltd
发明人： IRIBE SHINICHI , KOINUMA TAKEO , NANBA SHINJI
IPC分类号： H04Q3/42 , H04Q1/38
CPC分类号： H04Q1/38
摘要： PURPOSE:To send out a current inverting signal to a no-ringing terminal by a simple circuit, and to prevent a bell from ringing by discharging all charges accumulated in a capacity of a telephone set to a dummy loop, and subsequently, inverting a current direction and executing the charging. CONSTITUTION:When the contact 301 of a dummy loop forming relay is closed, an impression voltage to a telephone set 102 drops. Subsequently, a cutting relay of a current supplying relay 106 is operated, and its contacts 305, 306 are opened to discharge a capacity of the telephone set 102 completely by a dummy loop resistance 302 and high resistance elements 303, 304. Subsequently, the current is inverted by the contacts 104, 105 of a current inverting relay, and simultaneously, the contact 301 is opened, and the capacity of the telephone set 102 is charged through the elements 303, 304.
摘要翻译：目的：通过简单的电路将电流反相信号发送到无振铃端子，并且通过将在电话机的容量中累积的所有电荷放电到虚拟环路来防止振铃，并且随后将电流反转方向并执行充电。构成：当虚拟环形继电器的触点301闭合时，电话机102的压印电压下降。随后，电流供应继电器106的切断继电器被操作，并且其触点305,306被打开以通过虚拟回路电阻302和高电阻元件303,304完全释放电话机102的容量。随后，电流由电流反相继电器的触点104,105反转，同时触点301断开，电话机102的容量通过元件303,304充电。

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