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

JPS59114960A Feed circuit 失效
标题翻译：进线电路
公开(公告)号：JPS59114960A
公开(公告)日：1984-07-03
申请号：JP22452682
申请日：1982-12-21
申请人： Fujitsu Ltd
发明人： SHIBUYA KIYOSHI , AYANO MITSUTOSHI , ITOU SHINICHI , TAKATOU KENJI
IPC分类号： H04M19/00
CPC分类号： H04M19/001 , Y02D70/00
摘要： PURPOSE:To reduce the reactive power consumption by using with switching the feed voltage in response to the call current value. CONSTITUTION:The lower DC voltage is set in addition to the DC voltage V1 is set as the feed voltage to a call line (a). At the same time, a comparator (CMP) is provided as a monitor means of a call current I. The CMP always monitors the current I and then switches the feed voltage to V3 from V1 when the current I is higher than a prescribed level. Thus the power consumption is reduced.
摘要翻译：目的：通过根据呼叫电流值切换馈电电压来降低无功功率消耗。构成：除了将直流电压V1设置为通话线（a）的馈送电压之外，还设置较低的直流电压。同时，提供比较器（CMP）作为呼叫电流I的监视装置.CPTC总是监视电流I，然后当电流I高于规定电平时，将馈电电压从V1切换到V3。因此功耗降低。

2. 发明专利

JPS5990062A VOLTAGE ZERO-LEVEL DETECTING CIRCUIT 失效
公开(公告)号：JPS5990062A
公开(公告)日：1984-05-24
申请号：JP20012982
申请日：1982-11-15
申请人： FUJITSU LTD
发明人： TAKATOU KENJI , AYANO MITSUTOSHI , SHIBUYA KIYOSHI , TOUJIYOU TOSHIROU , ISHIKAWA HIROSHI
IPC分类号： G01R19/165 , G01R19/175
摘要： PURPOSE:To detect a voltage zero level by using such an inverting amplifier that the input terminal and uninverted input terminal are connected together through a resistance and the resistance ratio of feedback to the inverted input terminal is equal to the voltage-dividing resistance ratio of a specific voltage to the uninverted input terminal, and a comparator which compares its output voltage with the specific voltage. CONSTITUTION:The ratio of resistances R1 and R2 is equal to the ratio of resistances R3 and R4, and the reference voltage of the output signal r2 of the inverting amplifier coincides with the specific voltage V2. A high voltage input signal r1 to be inputted to an input terminal T1 is inputted directly to the inverting amplifier. The inverting amplifier has a reference voltage equal to the specific voltage V2 and an input signal r1 is attenuated as specified by the resistance ratio of the resistances R1 and R2 to output an amplifier output signal r2. The voltage V2 is impressed to the uninverted input terminal + of an operational amplifier OA2 constituting the comparator and the amplifier output signal r2 from the inverting amplifier is inputted to the inverted input terminal -... Then, the detection signal (d) outputted from the comparator indicates faithfully when the input signal r1 reaches the voltage zero level.

3. 发明专利

JPS58114589A DIAL PULSE INVERTING AND SENDING CIRCUIT 失效
公开(公告)号：JPS58114589A
公开(公告)日：1983-07-07
申请号：JP21399881
申请日：1981-12-26
申请人： FUJITSU LTD
发明人： SATOU TAKASHI , HAYASHI KIYOBUMI , TAKATOU KENJI
IPC分类号： H04Q1/32 , H04Q3/42
摘要： PURPOSE:To reduce the space of a dedicated polarity changeover relay and to decrease the number of independent control points, by changing the polarities of a dial pulse sending cicuit during connection confirmation signal reception through a photocoupler with high dielectric strength. CONSTITUTION:The dial pulse inverting and sending circuit consists of leased line trunks LDT0 and LDT1, a relay OGR for opposite station actuation, a dial pulse transmitting relay AR, a C position relay CTR, photocouplers IC0-IC4, a choke coil L, and a control circuit CTL. The relay OGR has contacts ogr0 and ogr1 and the relay AR has contacts ar0 and ar1. Then, the relay CTR has contacts ctr0 and ctr1. When a DC circuit is closed during transmission, a connection confirmation signal is sent out by the photocouplers IC1 and IC2 and while the photocouplers IC0 and IC3 are held in readiness for receiving the connection confirmation signal from the tansmission side, dial pulses from the transmission side are received.

4. 发明专利

JPS5851627A BALANCING CONNECTING NETWORK MATCHING SYSTEM 失效
公开(公告)号：JPS5851627A
公开(公告)日：1983-03-26
申请号：JP15100081
申请日：1981-09-24
申请人： FUJITSU LTD
发明人： TAKATOU KENJI , HAYASHI KIYOBUMI , SATOU TAKASHI
IPC分类号： H04B3/03 , H04B1/58 , H04B3/20 , H04M3/30
摘要： PURPOSE:To keep the quality of communication in excellent way, by connecting the best matched balancing connection network to the versatility of two-line side impedance of a two-wire line system. CONSTITUTION:A processor 7 detects a call, connects a digital signal transmitter 5 to a 4-wire reception terminal 36 of a subscriber circuit 3 via a time division circuit network 4 and a level measuring device 6 to a 4-wire transmission terminal 37. A call tone transmitted from the oscillator 5 is decoded 33 at the circuit 3 and transmitted to a two-wire line via a circuit 31. The leakage based on the unmatching between a two-wire side impedance and the impedance of balancing connection network 32-j(j=1-n) is encoded 34 and transmitted to the measuring device 6 for measurement. As a result, a connection network 32-j representing a minimum amount is discriminated and selected and connected to a line 2 via a circuit 31.

5. 发明专利

JPS56155456A SUBROUTINE NUMBER DISPLAY SYSTEM 失效
公开(公告)号：JPS56155456A
公开(公告)日：1981-12-01
申请号：JP5763080
申请日：1980-04-30
申请人： FUJITSU LTD
发明人： TAKATOU KENJI
IPC分类号： G06F9/40 , G06F11/00 , G06F11/32
摘要： PURPOSE:To facilitate search of the faulty position, by giving peculiar numbers to respective subroutines and by recording peculiar numbers of executed subroutines. CONSTITUTION:Peculiar numbers 1,000, 1,001... are given to subroutines SR-1, SR-2... included in the program of a test object. Decoder DEC discriminates the address which is transferred from central processing unit CPU through address bus AB and is given to subroutine number display device SND, and decoder DEC transfers start signal CE to control device CTL. Control device CTL receives and holds the subroutine number, which is transferred from central processing unit CPU through data bus DB, at the designation time of timing TM and converts this subroutine number to a decimal number and drives subroutine number display device SND to display the subroutine number.

6. 发明专利

JPS55147895A TRANSMISSION DELAY FLUCTUATION ABSORBING CIRCUIT 失效
公开(公告)号：JPS55147895A
公开(公告)日：1980-11-18
申请号：JP5540479
申请日：1979-05-07
申请人： FUJITSU LTD
发明人： YATSUHOSHI AKIMASA , YAMAUCHI KIYOJI , NOMURA YOSHITAKA , TAKATOU KENJI
IPC分类号： H04J3/06 , H04Q11/04
摘要： PURPOSE:To absorb fluctuation of transmission delay by providing a circuit, which corrects the maximum value of fluctuation of delay given to blocks, in the receiving side in the digital communication system where plural information are multiplexed and transmitted collectively by block units. CONSTITUTION:In the receiving part, the receiving signal is input to separate extracting circuit SREC while holding the time relation, and the data block and the synchronizing signal block number are separated and extracted. Counter WC write address generation counts the number of envelopes, where FiLL iN envelopes are eliminated and receiving service information are included, to transmit a write address and writes only data blocks including service information to receiving buffer BMA successively. Counter CA counts blocks in transmission buffer SQB with delay of maximum queuing time F. When a FiLL iN envelope is received, counter CA is set to the block number of the FiLL iN envelope.

7. 发明专利

JPS611193A GROUNDING PROTECTION CIRCUIT 失效
公开(公告)号：JPS611193A
公开(公告)日：1986-01-07
申请号：JP12253684
申请日：1984-06-14
申请人： FUJITSU LTD
发明人： AYANO MITSUTOSHI , SHIBUYA KIYOSHI , TAKATOU KENJI , HASHIMOTO YOSHITO , IKETANI YOUZOU
IPC分类号： H04B3/00 , H04M3/18 , H04M19/00 , H04Q1/20
摘要： PURPOSE:To decrease a permissible value of a transistor (TR) by supervising respectively a DC current fed to both wires of a channel and limiting a current fed to other wire when it is detected that a DC current is fed to one wire to make the detection of a grounding current easy. CONSTITUTION:The titled circuit is provided with a TRQa supplying a DC current from a DC potential VB to a wire La of a balanced two-wire channel, the 1st feeding circuit comprising an operational amplifier Aa and the 2nd supply circuit comprising a TRQb supplying a DC current from the DC potential VB to a wire Lb and an operational amplifier Ab. The circuit is provided with TRQc, Qd, Qe constituting the grounding circuit, resistors R1d, R2d, Re, a capacitor Cc and an operational amplifier Ac. Then it is detected that no DC current is fed to the wire Lb and a current is given to the wire La by the protection circuit and if a grounding current is generated, the supply of the DC current is limited by inactuating the TRQa.

8. 发明专利

JPS611160A CONSTANT CURRENT FEEDING CIRCUIT OF SUBSCRIBER CIRCUIT 失效
公开(公告)号：JPS611160A
公开(公告)日：1986-01-07
申请号：JP12066884
申请日：1984-06-14
申请人： FUJITSU LTD
发明人： TAKATOU KENJI , AYANO MITSUTOSHI , SHIBUYA KIYOSHI , IIJIMA YOSHIMI , SERIKAWA ATSUO
IPC分类号： H04M19/00
摘要： PURPOSE:To attain efficient constant current feeding by providing a midpoint potential detecting circuit of a talking line so as to prevent a common mode noise, blocking a differential noise produced between an inverting input of an operational amplifier and a negative power supply and providing a circuit reducing the power consumption at on-hook. CONSTITUTION:A series circuit connecting resistors RC0, RC1 at a point M1 is inserted between communication lines B and A, its output is fed to a potential point M2 between a power supply voltage -VBB and ground potential from the point M1 via an output of an operational amplifier A2 so as to detect a midpoint voltage. Then resistors Rf0, Rf1 are inserted respectively between emitters of transistors (TRs) Tr0, Tr1 and the inverting input of the amplifiers A0, A1 and each inverting input is grounded by a series circuit comprising a resistor Rs0, a capacitor C0 and a resistor Rs1 and a capacitor C1. Further, resistors Rd0, Rd1 are inserted respectively between the output of the amplifiers A0, A1 and the base of the Tr0, Tr1, a resistor Rg is inserted between the output of the amplifier A2 and the point M2 and Zener diodes D0, D1 are provided respectively between the point M2 and ground and between the point M2 and the power supply -VBB.

9. 发明专利

JPS601962A RING TRIP SYSTEM 失效
公开(公告)号：JPS601962A
公开(公告)日：1985-01-08
申请号：JP10881583
申请日：1983-06-17
申请人： FUJITSU LTD
发明人： TAKATOU KENJI , AYANO MITSUTOSHI , SHIBUYA KIYOSHI , SATOU TAKASHI , ITOU SHINICHI
IPC分类号： H04M3/06 , H04M19/02
摘要： PURPOSE:To use in common a ring trip circuit to plural lines by detecting off-hook of a subscriber telephone set during transmission of call signal so as to operate a call signal transmission stop function thereby stopping tentatively the call to the subscriber telephone set under transmission of a call signal. CONSTITUTION:When a call signal is fed to telephone sets TEL0 and TELn almost simultaneously, the bell of the telephone sets TEL0 and TELn rings at the same time. Suppose that the telephone set TEL0 hooks off and the telephone set TELn does not yet hook off. A common ring trip circuit RTP is activated in this case, a stop signal is given to all drive and SD signal control circuits DV0- DVn and all relays are restored tentatively, then the bell of the telephone set TELn not hooked off yet is stopped temporarily. Since a feeding and loop detection circuit BS0 detects off-hook and a feeding and loop detection circuit BSn does not detect off-hook, the call signal is transmitted again.

10. 发明专利

JPS59165557A Signal transmitting system 失效
标题翻译：信号发送系统
公开(公告)号：JPS59165557A
公开(公告)日：1984-09-18
申请号：JP3938683
申请日：1983-03-10
申请人： Fujitsu Ltd
发明人： ITOU SHINICHI , AYANO MITSUTOSHI , SHIBUYA KIYOSHI , TAKATOU KENJI , TAKEDA YOSHITO
IPC分类号： H04M19/02
CPC分类号： H04M19/02
摘要： PURPOSE:To simplify the constitution of a subscriber circuit by transmitting the call signal and the howler signal after superposing them on each other and selecting these signals by a subscriber telephone. CONSTITUTION:A subscriber circuit LC contains a signal multiplexing circuit C which superposes the signal sent from a call signal source RI on the signal sent from a howler signal source H. The multiplexed signal is sent to a subscriber telephone SWB. This telephone SWB gives an answer only to the call signal when it is hooked on and rings a bell. While the SWB gives no answer to the call signal and outputs a howler tone after giving an answer only to the howler signal when the SWB is hooked off.
摘要翻译：目的：为了简化用户电路的结构，通过在彼此叠加之后发送呼叫信号和呼叫信号，并通过用户电话选择这些信号。构成：订户电路LC包含信号复用电路C，该信号复用电路C将从呼叫信号源RI发送的信号叠加在从嚎叫信号源H发送的信号上。复用的信号被发送到用户电话SWB。这个电话SWB仅在呼叫信号被挂断并响铃时给出答案。虽然SWB没有给出呼叫信号的答案，但是当SWB被关闭时给出答案后才会输出一个嘟嘟声。

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