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

JPS57150228A PROGRAMMABLE COUNTER CIRCUIT 失效
公开(公告)号：JPS57150228A
公开(公告)日：1982-09-17
申请号：JP3591581
申请日：1981-03-12
申请人： NIPPON ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAZAKI TOYOE , KUSAMA NOBORU , OKAMOTO SHIGEHARU , NOJIMA TOSHIO
IPC分类号： H03K23/64 , H03K23/66
摘要： PURPOSE:To reduce power consumption and to obtain an economical circuit, by constituting a programmable counter circuit of 3 programmable counters and 1 preset signal circuit. CONSTITUTION:A preset signal circuit 7 is provided so that the length and the timing of a frequency-dividing output CO of a programmable counter 6 comforms with a frequency-dividing output of a prescaler 1, and an output signal is applied to a programmable counter 2 through this circuit and is preset. As a result, a preset signal applied to an input PE of the programmable counter 2 becomes a signal extending over 1 period of a count-out signal CO of the prescaler 1, and counts exactly by the number of programs. On the other hand, operating frequency of the programmable counter 2 becomes lower than the input frequency by a dividing ratio of the prescaler 1, and also operating frequencies of the programmable counter 5 and 6 becomes lower by the product of dividing ratios of the prescaler 1 and 4.

2. 发明专利

JPS5890833A RADIO RELAYING SYSTEM 失效
公开(公告)号：JPS5890833A
公开(公告)日：1983-05-30
申请号：JP18848281
申请日：1981-11-26
申请人： NIPPON TELEGRAPH & TELEPHONE , NIPPON ELECTRIC CO
发明人： TOOYAMA HIDEKI , OKAMOTO SHIGEHARU , NOJIMA TOSHIO , MATSUO YOSHITAKE
IPC分类号： H04B7/15 , H04B7/155 , H04B7/26
摘要： PURPOSE:To obtain a booster radio relaying device which can efficiently relays only electromagnetic waves requiring relaying, by monitoring electromagnetic waves including channel designation information radiated from a base station to a mobile station at a relay station. CONSTITUTION:The presence of a call is discriminated that a demodulation output based on electromagnetic waves radiated by a mobile station in a relay service area is produced in an incoming channel control signal demodulator 9, and a controller 3 detects a channel designation signal from a base station side corresponding to the channel having the said demodulation output out of a demodulated output of an outgoing channel control signal demodulator 6 and drives incoming and outgoing channel selectors 7', 2' so as to relay electromagnetic waves of the channel number included in the said channel designation signal. In case of outgoing calls, the electromagnetic waves including the channel designation information radiated from the base station are monitored and the selectors 7', 2' are driven so as to be set to the designated channel similarly.

3. 发明专利

JPH11122191A OPTICAL FIBER TRANSMISSION SYSTEM FOR RADIO SIGNAL 失效
公开(公告)号：JPH11122191A
公开(公告)日：1999-04-30
申请号：JP28364297
申请日：1997-10-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： CHIN GIYOU , TARUSAWA YOSHIAKI , NOJIMA TOSHIO
IPC分类号： H04J14/00 , H04B10/29 , H04B10/54 , H04J14/02 , H04B10/17 , H04B10/16
摘要： PROBLEM TO BE SOLVED: To simply configure relaying to a tunnel or an underground shopping center in mobile communication. SOLUTION: An outgoing radio signal from a base station is converted into an optical signal with a frequency band 31 at a base unit 11 and sent to an optical fiber 27 through a multiplexer demultiplexer 25, and the optical signal with the band 31 is reproduced into a radio signal by a photo diode 17 at a multiplexer demultiplexer 26 for each access unit 12-i coupled with the optical fiber 27 by a photocoupler 28 and sent from an antenna 19. The radio signal from a mobile set received by the antenna 19 is converted by a laser diode 21 into an optical signal with one wavelength in the band 32 for each unit 12-i and the optical signal is converted into a radio signal by a photo diode 22 in the unit 11 through the multiplexer demultiplexer 26 and the optical fiber 27 coupled by a photocoupler 28 and sent to the base station.

4. 发明专利

JPH10107655A HIGH SENSITIVITY RADIO RECEIVER 失效
公开(公告)号：JPH10107655A
公开(公告)日：1998-04-24
申请号：JP25337896
申请日：1996-09-25
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NARAHASHI SHOICHI , MIMURA TETSUYA , NOJIMA TOSHIO
IPC分类号： H04B1/10 , H04B1/06 , H04B1/18
摘要： PROBLEM TO BE SOLVED: To attain common use of antenna for transmission and reception, to protect the receiver from a lightening surge, and to detect an abnormality in a reception low noise amplifier (RA). SOLUTION: A reception system circuit and a transmission system circuit are connected to an antenna feeder 2 by a coupling circuit 20 after being through a 2nd reception band filter(RBF) 22 and a transmission band filter (SBF) 21, respectively. The 2nd RBF selects only a reception signal band and suppresses the other bands, and the 2nd SBF selects only a transmission signal band and suppresses the other bands. A lightening surge protection means (PRT) is inserted respectively to an antenna feeder 2, a reception signal output terminal 5, a 1st power supply terminal 8 for the RA, a 2nd power supply terminal 9 for a cooling means 7 and a transmission signal input terminal 24 in the receiver. A fault of the RA 4 is detected by providing a pilot signal generating means, giving a pilot signal to the RA 4 and monitoring a level of the pilot signal via a transmission line connecting to the output terminal 5.

5. 发明专利

JPH1056429A OPTICAL WAVELENGTH MULTIPLEX COMMUNICATION SYSTEM CONSISTING OF MASTER SET AND A PLURALITY OF SLAVE SETS 失效
公开(公告)号：JPH1056429A
公开(公告)日：1998-02-24
申请号：JP22759096
申请日：1996-08-08
申请人： NIPPON TELEGRAPH & TELEPHONE , NIPPON TSUSHINKI KK
发明人： NOJIMA TOSHIO , TARUSAWA YOSHIAKI , URUSHIBARA HIDEO , MASAKI HITOSHI , YAMADA AKIO
IPC分类号： H04J14/00 , H04B10/079 , H04B10/40 , H04B10/50 , H04B10/60 , H04J14/02 , H04B10/28 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/26
摘要： PROBLEM TO BE SOLVED: To monitor the entire system with a simple circuit by integrating an RF pilot signal generator with a slave set, and each optoelectric and electrooptic unit and integrating an RF pilot signal detector with a master set. SOLUTION: A master set A0 is made up of an electrooptic conversion means 1, an optoelectric conversion means 2, and a monitor unit 3. Each of slave sets A1 -An is made up of a distribution means 4, an optoelectric conversion means 5, a monitor means 6, a control unit 7, an electrooptic conversion means 8 and a synthesis means 9. The control unit 7 outputs a control signal based on a light receiving detection level signal outputted from a monitor means 6 monitoring the optoelectric conversion means 5. In the case of occurrence of defective reception, an output of the electrooptic conversion means 8 is stopped or decreased with the outputted control signal. The monitor unit 3 of the master set A0 monitors a defect and a fault or the like of an optical line or an optoelectric conversion unit and an electrooptic conversion unit based on an output state of the electrooptic conversion means 8.

6. 发明专利

JPH1056339A HIGH-FREQUENCY AMPLIFIER 失效
公开(公告)号：JPH1056339A
公开(公告)日：1998-02-24
申请号：JP22776896
申请日：1996-08-09
申请人： MURATA MANUFACTURING CO , NIPPON TELEGRAPH & TELEPHONE
发明人： MASAFUJI YOSHITO , TARUSAWA YOSHIAKI , NOJIMA TOSHIO
IPC分类号： H03H7/38 , H03F3/189
摘要： PROBLEM TO BE SOLVED: To make equipment, provided with the high frequency amplifier, small-sized, lightweight, and low-priced. SOLUTION: On the input side of a power amplifier circuit 40, a high-pass input matching circuit 82 and a low-pass input matching circuit 85 are cascaded; and one transmit input signal between two kind of transmit input signals of different frequency matches by the high-pass input matching circuit 82 and the other transmit input signal matches by the low-pass input matching circuit 85. On the output side of the power amplifier circuit 40, a high-pass output matching circuit 89 and a low-pass output matching circuit 92 are cascaded; and one transmit output signal matches by the high-pass output matching circuit 89 and the other transmit output signal is matched by the low-pass output matching circuit 92.

7. 发明专利

JPH0918397A MULTIBAND HIGH FREQUENCY CIRCUIT FOR MOBILE RADIO EQUIPMENT 失效
公开(公告)号：JPH0918397A
公开(公告)日：1997-01-17
申请号：JP15935095
申请日：1995-06-26
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TARUSAWA YOSHIAKI , NOJIMA TOSHIO
IPC分类号： H04B1/3822 , H04B1/40 , H04B1/44 , H04B1/48 , H04B7/08
摘要： PURPOSE: To share the high frequency circuit of a mobile equipment by a digital automobile telephone system (FDD) and a digital cordless telephone system (TDD) which are Japanese standard systems. CONSTITUTION: Reception bands (a) and (b) are used in the FDD and the band (c) is shared for transmission and reception in the TDD. An antenna A1 is for the transmission/reception of the FDD and the TDD and the antenna A2 is dedicated to the diversity reception of the FDD. Respective switches SW1 and SW2 are switched and the FDD and the TDD are coped with. In the FDD, the reception signals of the antenna A1 or A2 are selected in a BPF1 and inputted to a reception amplifier RA and the output of a transmission amplifier SA is passed through the BPF3 and supplied to the antenna A1. In the TDD, the reception signals of the antenna A1 are selected in the BPF2 and inputted to the reception amplifier RA at a reception timing and the output of the transmission amplifier SA is passed through the BPF2 and supplied to the antenna A1 at a transmission timing.

8. 发明专利

JPH07303049A EMERGENCY SHUTDOWN DEVICE FOR TRANSMITTER 失效
公开(公告)号：JPH07303049A
公开(公告)日：1995-11-14
申请号：JP9443294
申请日：1994-05-06
申请人： NIPPON TELEGRAPH & TELEPHONE , JAPAN RADIO CO LTD
发明人： MATSUMOTO AKIO , NOJIMA TOSHIO , NARAHASHI SHOICHI , MAEDA MAKOTO , SAKAMOTO HIROTOKU
IPC分类号： H04B1/04
摘要： PURPOSE:To prevent the needless radiation of a radio transmitter from being applied. CONSTITUTION:An input signal is amplified by the power amplifier 2 of a transmitter, and is outputted to an output terminal 4, and a part of the output is distributed by a signal distribution circuit 3, and is inputted to a distortion level detector 5. When intermodulation distortion between two frequencies decided in advance occurs due to the deterioration of linearity of the amplifier 2, the level of the intermodulation distortion by the distortion level detector 5 is increased, and when it exceeds a prescribed value, a control signal is generated from a control circuit 11, and a shutdown circuit 8 is set in a shutdown state by the control signal, then, the supply of operating power source power to the amplifier 2 is stopped.

9. 发明专利

JPH07235904A ANALOG OPTICAL FIBER TRANSMITTING DEVICE 失效
公开(公告)号：JPH07235904A
公开(公告)日：1995-09-05
申请号：JP2451494
申请日：1994-02-22
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： FUTAKATA TOSHIYUKI , TARUSAWA YOSHIAKI , NOJIMA TOSHIO
IPC分类号： H04B10/07 , H04B10/2507 , H04B10/2575 , H04B10/291 , H04B10/54 , H04B10/572 , H04Q7/22 , H04Q7/24 , H04Q7/26 , H04B10/02 , H04B10/18 , H04Q7/30 , H04Q7/36
摘要： PURPOSE:To decrease the beating noises caused by the wavelength variance of an electro-optical transducer by controlling the wavelength of the electro- optical transducer which transduces the radio signals into the optical signals in an access terminal. CONSTITUTION:A wavelength control circuit 14 measures the noise levels based on the output of a photoelectric transducer 13 and controls the wavelength of an electro-optical transducer 7 based on the measured noise levels in order to reduce these nosie levels. The up-RF signal of each of access terminals 5-1, 5-2... 5-n is turned into a light intensity modulation wave by the transducer 7. These modulation waves are connected together into a single piece of optical fiber 9 by the photocouplers 8-1, 8-2... 8-n. Therefore the intensity of the optical signal is modulated on the up-fiber 9 by the RF signal of each access terminal. Thus a synthetic signal of optical signals is obtained. The synthesized RF signals can be collectively demodulated by a photoelectric transducer 10 such as a photodiode, etc., at the output terminal of the fiber 9. As a result, the RF signals can be transmitted via a single optical fiber and also the beating noises can always be decreased.

10. 发明专利

JPH07131415A ANALOG OPTICAL FIBER LINK 失效
公开(公告)号：JPH07131415A
公开(公告)日：1995-05-19
申请号：JP27076293
申请日：1993-10-28
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： FUTAKATA TOSHIYUKI , TARUSAWA YOSHIAKI , NOJIMA TOSHIO
IPC分类号： H04B10/2507 , H04B10/07 , H04B10/278 , H04B10/293 , H04B10/564 , H04B10/572 , H04J14/00 , H04J14/02 , H04B10/02 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/18
摘要： PURPOSE:To automatically reduce the occurrence of interference noise based on the variance of the luminescence wavelength due to the temperature variance or the secular change with respect to wavelength multiplex transmission. CONSTITUTION:Signals from terminals 131 to 13n are subjected to wavelength multiplexing and are transmitted by an optical fiber 12 and are collectively converted to an RF signal by a photoelectric transducer 19. The noise level on the outside of the RF signal band is measured by a wavelength control circuit 21 and is compared with the just preceding noise level, and a wavelength control signal is so generated that the noise is reduced, and a terminal is designated, and it is supplied to an electrooptical transducer 18 as the RF signal on the outside of the transmission RF band. The wavelength control signal is extracted from the converted electric signal by a reception circuit 19 in the designated terminal, and the driving current of a laser diode 17 is controlled by a control circuit 31.

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