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1. 发明专利

JP2561506B2 失效
公开(公告)号：JP2561506B2
公开(公告)日：1996-12-11
申请号：JP5080388
申请日：1988-03-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OKAMOTO SHIGEHARU , OOGURO KAZUHIRO
IPC分类号： H03C1/52 , H04B1/04

2. 发明专利

JPH01225207A HIGH FREQUENCY AMPLIFIER 失效
公开(公告)号：JPH01225207A
公开(公告)日：1989-09-08
申请号：JP5080288
申请日：1988-03-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OGURO KAZUHIRO , OKAMOTO SHIGEHARU
IPC分类号： H03C1/00 , H03F3/189 , H03F3/68
摘要： PURPOSE:To obtain the stable linear amplifier of high efficiency by frequency- converting a signal to be amplified to a low frequency, which can be easily handled, and generating a phase modulating wave of a constant amplitude in a mutually conjugate relation from an amplitude component. CONSTITUTION:The input signal of a terminal 1 is mixed with the output of a local oscillator 3 by a frequency mixer 2, frequency-converted and passed through a band pass filter 4. The output signal of the filter 4 is branched to signals and one of the signals is inputted to an envelope detecting circuit 5. The amplitude component to be obtained in a detecting output is inputted to a conjugate wave generating circuit 7 to generate two phase component signals, which are in the mutually conjugate relation, by the output of the oscillator 3. On the other hand, the output signal of the filter 4 passes through an amplitude limiter 6 and a delay circuit 8 and goes to be a phase component not to include the amplitude component. This phase component and the two output signals of the circuit 7 are respectively mixed by frequency mixers 9 and 10, frequency-converted and returned to the original frequency. The outputs of the mixers 9 and 10 are respectively amplified by high efficiency amplifiers 13 and 14. The outputs of these amplifiers 13 and 14 are added by an adding circuit 15 and sent to an output terminal 16.

3. 发明专利

JPS6154818A Battery saving circuit 失效
标题翻译：电池节电
公开(公告)号：JPS6154818A
公开(公告)日：1986-03-19
申请号：JP17474284
申请日：1984-08-22
申请人： Nippon Telegraph & Telephone , Mitsubishi Corp
发明人： OKAMOTO SHIGEHARU , MONMA KOJI , SEKI SEIZO , TAKECHI SUMIO , YAMADA MASARU
IPC分类号： H02J1/00 , H02J7/00
CPC分类号： Y02D70/00

4. 发明专利

JPS60143037A MOBILE RADIO COMMUNICATION SYSTEM 失效
公开(公告)号：JPS60143037A
公开(公告)日：1985-07-29
申请号：JP24992483
申请日：1983-12-29
申请人： NIPPON TELEGRAPH & TELEPHONE , MITSUBISHI CORP
发明人： OKAMOTO SHIGEHARU , MONMA KOUJI , SEKI SEIZOU , TAKECHI SUMIO , YAMADA MASARU
IPC分类号： H04B1/3822 , H04B1/40 , H04W36/38 , H04W48/20 , H04W64/00 , H04W76/00 , H04W84/02
摘要： PURPOSE:To attain conversation with a center device by constituting a system with plural radio base stations and many mobile radio devices connected to the center device. CONSTITUTION:When a transmission request from a mobile radio device 3 is transmitted, it is received by a radio base station 2, information of reception level is added and it is transmitted to the center device 1 together with an identification signal. The center device 1 raises an alarm tone and analyzes a signal form the radio base station 2. When the signal is identified as a communication request signal, a communication regulation signal is transmitted. This signal is relayed by the radio base station 2 and received by a mobile radio device 3. The mobile radio device 3 transmitting a transmission request where the identification signal is coincident releases the restriction of communication, brings amplifiers 34, 38 to the operating state to constitute a channel between the mobile radio device 3 and the center device 1.

5. 发明专利

JPS6021493B2 失效
公开(公告)号：JPS6021493B2
公开(公告)日：1985-05-28
申请号：JP1435979
申请日：1979-02-13
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OKAMOTO SHIGEHARU , KOMAKI SHOZO , HORIKAWA IZUMI
IPC分类号： H04L1/06 , H04B7/08

6. 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.

7. 发明专利

JPS55128935A SPACE DIVERSITY RECEIVING DEVICE 失效
公开(公告)号：JPS55128935A
公开(公告)日：1980-10-06
申请号：JP3564379
申请日：1979-03-28
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KOMAKI SHIYOUZOU , HORIKAWA IZUMI , OKAMOTO SHIGEHARU
IPC分类号： H04B7/08
摘要： PURPOSE:To reduce the level deviation and the delay deviation within the band which are generated at the frequency selecting fading transmission line, by using the waveform distortion caused at the transmission line for the control signal of the phase shifter. CONSTITUTION:In the vector diagram (a) of the reception signals of antennas 1 and 2, the delay time difference between the main wave and the interference wave is set substantially identical between the both antennas. And when the reception signals are compounded in such constitution, the signal of antenna 2 receives the phase shift by amount theta equal to 130 deg. in order to erase (b) the interference wave. As a result, only main waves 1 and 2 which have no delay time difference between them remain at the signal after compounding. and thus both the amplitude and delay characteristics become flat within the band, eliminating the waveform distortion.

8. 发明专利

JPS5427341A NONLINEAR DISTORTION COMPENSATION DEVICE 失效
公开(公告)号：JPS5427341A
公开(公告)日：1979-03-01
申请号：JP9270477
申请日：1977-08-02
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NOJIMA TOSHIO , OOYAMA TOORU , OKAMOTO SHIGEHARU
IPC分类号： H03F1/32 , H03H7/01 , H04B3/00 , H04B3/06
摘要： PURPOSE:To compensate the nonlinear distortion noise of the amplifier by means of the nonlinear distortion generating circuit whose input/output characteristics shows the square and cube properties.

9. 发明专利

JPS6155283B2 失效
公开(公告)号：JPS6155283B2
公开(公告)日：1986-11-27
申请号：JP11436981
申请日：1981-07-23
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NOJIMA TOSHIO , OKAMOTO SHIGEHARU , YUKI KYOJI
IPC分类号： H03F1/32 , H04B3/04

10. 发明专利

JPS5839407B2 失效
公开(公告)号：JPS5839407B2
公开(公告)日：1983-08-30
申请号：JP9270477
申请日：1977-08-02
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NOJIMA TOSHIO , OOYAMA TOORU , OKAMOTO SHIGEHARU
IPC分类号： H03F1/32 , H03H7/01 , H04B3/00 , H04B3/06

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