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1. 发明专利

JPS61232709A GAIN VARIABLE AMPLIFIER 失效
公开(公告)号：JPS61232709A
公开(公告)日：1986-10-17
申请号：JP7262885
申请日：1985-04-08
申请人： HITACHI LTD , HITACHI CABLE
发明人： KINOSHITA TAIZO , YAMASHITA KIICHI , GOTO MASAHIRO , SASAKI SHINYA
IPC分类号： H03G3/10
摘要： PURPOSE:To make flat the frequency characteristic at the time of the gain control by connecting the diode in the reverse direction to at least one of the first and second differential amplifiers. CONSTITUTION:The junction capacity of a diode 13 connected to respective emitters of transistors 7 and 8 in the reverse direction is used as the capacity for the high area compensation of the frequency characteristic. Since the diode 13 makes the transistor at the same process, the process deviation occurs in the same way, and therefore, the performance change can be decreased. On the other hand, since the junction capacity of the diode 13 has the reverse bias dependency, the high area compensation effect can be changed by controlling the bias voltage. Thus, by interlocking to the gain control and controlling the capacity value of the diode 13, the frequency characteristic can be made flat regardless of the size of the gain.

2. 发明专利

JPH03250812A FLIP-FLOP CIRCUIT 失效
公开(公告)号：JPH03250812A
公开(公告)日：1991-11-08
申请号：JP4546190
申请日：1990-02-28
申请人： HITACHI LTD , HITACHI CABLE
发明人： IRIE HIRONORI , KANETANI TATSUNORI , SEKINE YASUSHI , GOTO MASAHIRO
IPC分类号： H03K3/286 , H03K3/037 , H03K19/173
摘要： PURPOSE:To improve the transmission characteristic of a laser diode (LD) drive integrated circuit and to enhance the transmission rate of the optical communication system while decreasing an external terminal number by selectively switching the function as an edge trigger flip-flop circuit or a simple gate circuit. CONSTITUTION:A flip-flop circuit FF acts like a waveform shaping flip-flop circuit by bringing a function selection signal FC to a low level, the flip-flop circuit FF acts like a gate circuit sending singly an input signal by bringing the function selection signal FC to a high level. Thus, the flip-flop circuit FF is realized, whose function is selected as the edge trigger flip-flop circuit or a single gate circuit. Thus, the effect of a parasitic capacitance or the like coupled with an external terminal is eliminated, the transmission characteristic of an LD drive integrated circuit is improved and the transmission rate of the optical communication system including the said LD drive integrated circuit is enhanced.

3. 发明专利

JPS62145909A PEAK VALUE DETECTION CIRCUIT 失效
公开(公告)号：JPS62145909A
公开(公告)日：1987-06-30
申请号：JP28553885
申请日：1985-12-20
申请人： HITACHI LTD , HITACHI CABLE
发明人： KINOSHITA TAIZO , YAMASHITA KIICHI , GOTO MASAHIRO
IPC分类号： H03G3/30 , H03K5/02
摘要： PURPOSE:To suppress the peak value detection error due to the fluctuation of a mark rate by providing a negative feedback path comprising the mark rate detection circuit between a gain variable amplifier and an amplitude limit circuit provided at the post stage. CONSTITUTION:An output of a variable gain amplifier 1 is divided into two; the one is given to a peak detection circuit 2, where the peak value is detected and fed to a comparison circuit 3 and the other is given to an amplitude limit circuit 4, where the value is waveform-shaped to a constant amplitude and the mark rate is detected by a mark rate detection circuit 5. The detected mark rate information is inputted to an inverting input being the other input of the comparison circuit 3, where the output of the mark rate detection circuit 5 is used as a comparison reference value to compare the said peak value. Since the variable gain amplifier 1 is controlled by the output of the comparator 3, the negative feedback of the mark rate information is applied to suppress the error of the peak value detection due to the fluctuation of the mark rate.

4. 发明专利

JPS62163434A OPTICAL REPEATER 失效
公开(公告)号：JPS62163434A
公开(公告)日：1987-07-20
申请号：JP348286
申请日：1986-01-13
申请人： HITACHI LTD , HITACHI CABLE
发明人： KINOSHITA TAIZO , YAMASHITA KIICHI , GOTO MASAHIRO , SASAKI SHINYA
IPC分类号： H04L7/027 , H04B10/00 , H04B10/07 , H04B10/29 , H04L7/02 , H04L25/40 , H04L25/52
摘要： PURPOSE:To reduce remarkably the clock extraction time to a burst signal input from a no-signal state by adopting the constitution that the Q value of a tuning circuit is increased when the optical input signal is normal and the Q is lowered at no-signal. CONSTITUTION:A tuning circuit whose Q is variable is used for the tuning circuit 5. A Q control circuit receiving a signal fed from an equivalent amplifier 3 and controlling the Q of the circuit 5 depending on the quantity of the signal is provided. When a signal level fed from the equivalent amplifier 3 is larger than the setting value and it is decided that an optical signal is inputted, the circuit 7 controls the Q of the circuit 5 so as to be increased. Thus, the loss of the stored energy of a clock component is very small and the mark rate is low and consecutive zero signals take place, then it is possible to extract a clock of small jitters. Thus, the clock extracting time is reduced remarkably.

5. 发明专利

JPS61219208A VARIABLE-GAIN AMPLIFIER 失效
公开(公告)号：JPS61219208A
公开(公告)日：1986-09-29
申请号：JP6022885
申请日：1985-03-25
申请人： HITACHI LTD , HITACHI CABLE
发明人： KINOSHITA TAIZO , YAMASHITA KIICHI , SASAKI SHINYA , GOTO MASAHIRO
IPC分类号： H03G3/10 , H03G3/30
摘要： PURPOSE:To obtain an amplifier which is small in variation of output DC potential even if the gain varies over a wide range when multistage direct connection of amplifiers is realized, by providing a current adder for adding the collector currents of one set of transistors which become the same shunting ratio and a current distributor. CONSTITUTION:The variable-gain of this invention is constituted in such a way that collector currents of transistors 5 and 4 are added to each other by means of a current adder 7 and gain distributed by means of a current distributor 8. After the distribution the currents are respectively added to collector currents of transistors 6 and 3. In other words, the collector currents of the one set of transistors 5 and 4, which become the same shunting ratio out of the two sets of differential pair transistors 6 and 5, and 4 and 3 respectively controlling shunting ratios of signal currents having the same and opposite phases as input signals have, are respectively added to the collector currents of the other set of transistors 6 and 3, which become the same shunting ratio, after the collector currents of the transistor 5 and 4 are added to each other and equally distributed.

6. 发明专利

JP2013232769A Antenna device, antenna controller, and antenna system 审中-公开
标题翻译：天线设备，天线控制器和天线系统
公开(公告)号：JP2013232769A
公开(公告)日：2013-11-14
申请号：JP2012103538
申请日：2012-04-27
申请人： Hitachi Cable Ltd , 日立電線株式会社
发明人： GOTO MASAHIRO
IPC分类号： H04B1/40
摘要： PROBLEM TO BE SOLVED: To provide an antenna device, antenna controller, and antenna system, inhibiting a circuit in a device from being damaged when a connector of a cable connected between devices or circuits is not connected.SOLUTION: The antenna device includes: antenna housing (an antenna); an RF connector 426 into which a modulation control signal Sas a modulated control signal, an RF signal (a feeding signal) Sand a DC power supply are input; a modem circuit 423 that demodulates the modulation control signal Sinto a control signal; an AISG device that controls an antenna housing on the basis of an AISG signal Scomprised of the control signal demodulated by the modem circuit 423 and the DC power supply; and a switch circuit 425 that closes a wiring between the RF connector 426 and the modem circuit 423 when the DC power supply is supplied and opens the wiring when the DC power supply is not supplied.
摘要翻译：要解决的问题：提供一种天线装置，天线控制器和天线系统，当连接在设备或电路之间的电缆的连接器未连接时，禁止装置中的电路被损坏。解决方案：天线装置包括：天线外壳（天线）; 输入调制控制信号Sas为调制控制信号，RF信号（馈送信号）Sand为直流电源的RF连接器426; 将调制控制信号Sinto解调为控制信号的调制解调电路423; AISG装置，其根据由调制解调器电路423解调的控制信号和直流电源的AISG信号控制天线外壳; 以及开关电路425，其在提供直流电源时关闭RF连接器426和调制解调器电路423之间的布线，并且在不提供直流电源时打开布线。

7. 发明专利

JP2013106069A Antenna system and antenna device 审中-公开
标题翻译：天线系统和天线设备
公开(公告)号：JP2013106069A
公开(公告)日：2013-05-30
申请号：JP2011246494
申请日：2011-11-10
申请人： Hitachi Cable Ltd , 日立電線株式会社
发明人： GOTO MASAHIRO , KOMURO TAMOTSU
IPC分类号： H04B1/18
摘要： PROBLEM TO BE SOLVED: To provide an antenna system and an antenna device in which demodulator circuits can be exchanged without stopping electric supply to an antenna.SOLUTION: The antenna system comprises: an antenna control device which transmits a composite signal Sin which a power feed signal (RF signal S) and a modulation signal S, resulting from an AISG signal modulated, are composed; and an antenna device 4 which receives the composite signal Sfrom the antenna control device through an RF power feed cable. The antenna device 4 comprises: an antenna cabinet 400; a bias tee 403 which divides the composite signal Sinto the modulation signal Sand the RF signal S; an antenna modem 42 which demodulates the modulation signal Sto an AISG signal S; and an AISG device which controls the antenna cabinet 400 with the AISG signal S. The bias tee 403 feeds the RF signal Sto the antenna cabinet 400. The antenna modem 42 is attachably and detachably connected to the bias tee 403 with connectors 402, 41a.
摘要翻译：要解决的问题：提供一种可以在不停止向天线供电的情况下更换解调器电路的天线系统和天线装置。解决方案：天线系统包括：天线控制装置，其发送组合信号S 5 ，其中馈电信号（RF信号S 1 ）和由AISG信号调制得到的调制信号S 4 ; 以及天线装置4，其通过RF馈电电缆从天线控制装置接收复合信号S 5 。天线装置4包括：天线箱400; 将复合信号S 5 分割成调制信号S 4 的偏置三通403和RF信号S 1 ; 将调制信号S 4 解调为AISG信号S 2 的天线调制解调器42; 以及AISG装置，其利用AISG信号S 2 来控制天线箱400。偏置三通403将RF信号S 1 馈送到天线柜400.天线调制解调器42可连接并可拆卸地连接到具有连接器402,471的偏置三通403。版权所有（C）2013，JPO＆INPIT

8. 发明专利

JP2013055586A Interface circuit for aisg device and aisg device 审中-公开
标题翻译： AISG设备和AISG设备的接口电路
公开(公告)号：JP2013055586A
公开(公告)日：2013-03-21
申请号：JP2011193804
申请日：2011-09-06
申请人： Hitachi Cable Ltd , 日立電線株式会社
发明人： GOTO MASAHIRO
IPC分类号： H04B1/40
摘要： PROBLEM TO BE SOLVED: To provide an interface circuit for AISG device and AISG device, capable of properly executing communication even when a DC return voltage rises due to a voltage drop in a control cable.SOLUTION: The present invention comprises an input connector 2 and an output connector 3 in compliance with AISG standards, and a voltage shift circuit 8 that boosts a control signal input from the input connector 2 at a fixed voltage before output.
摘要翻译：要解决的问题：为了提供用于AISG设备和AISG设备的接口电路，即使当由于控制电缆中的电压降而导致DC返回电压上升时，也能够正确地执行通信。解决方案：本发明包括符合AISG标准的输入连接器2和输出连接器3，以及在输出之前以固定电压升高从输入连接器2输入的控制信号的电压移位电路8。版权所有（C）2013，JPO＆INPIT

9. 发明专利

JP2013026894A Modem and antenna control system 审中-公开
标题翻译：调制解调器和天线控制系统
公开(公告)号：JP2013026894A
公开(公告)日：2013-02-04
申请号：JP2011160896
申请日：2011-07-22
申请人： Hitachi Cable Ltd , 日立電線株式会社
发明人： GOTO MASAHIRO
IPC分类号： H04B1/40
摘要： PROBLEM TO BE SOLVED: To provide a modem that can be used for both a BS modem and an antenna modem, and to provide an antenna control system.SOLUTION: The modem comprises: an AISG connectors 4a and 4b of which respective pin terminals for inputting and outputting a control signal and a power supply signal are electrically connected with each other; a modem circuit 5 that modulates the control signal input from the AISG connector 4a to generate and output the modulation signal, or demodulates the modulation signal into the control signal to be output to the AISG connector 4b; a combining and separating circuit 6 that combines the modulation signal and the power supply signal to generate and output an AISG signal, or separates the AISG signal into the modulation signal and the power supply signal to be output to the modem circuit 5 and the AISG connector 4b; and a bias T circuit 7 that superimposes the AISG signal on a feed signal to generate a superimposed signal and output the generated signal via an RF connector 3b or separates the superimposed signal into the AISG signal and the feed signal to be output to the combining and separating circuit 6 and the RF connector 3a.
摘要翻译：要解决的问题：提供可用于BS调制解调器和天线调制解调器的调制解调器，并提供天线控制系统。调制解调器包括：AISG连接器4a和4b，其中用于输入和输出控制信号和电源信号的各个引脚端子彼此电连接; 调制从AISG连接器4a输入的控制信号的调制解调电路5，生成并输出调制信号，或者将调制信号解调为输出到AISG连接器4b的控制信号; 组合分离电路6，其组合调制信号和电源信号以产生和输出AISG信号，或将AISG信号分离成调制信号和电源信号，以输出到调制解调器电路5和AISG连接器 4b; 以及偏置T电路7，其将AISG信号叠加在馈送信号上以产生叠加的信号，并且经由RF连接器3b输出所产生的信号，或将叠加的信号分离成AISG信号，并将馈送信号输出到组合和分离电路6和RF连接器3a。版权所有（C）2013，JPO＆INPIT

10. 发明专利

JP2012253552A Antenna control system and antenna control system expansion unit 有权
标题翻译：天线控制系统和天线控制系统扩展单元
公开(公告)号：JP2012253552A
公开(公告)日：2012-12-20
申请号：JP2011124347
申请日：2011-06-02
申请人： Hitachi Cable Ltd , 日立電線株式会社
发明人： GOTO MASAHIRO
IPC分类号： H04B1/38
摘要： PROBLEM TO BE SOLVED: To provide an antenna control system and an antenna control system extension unit which can sufficiently supply electric power to a terminal device and extend a distance between a control device and a terminal device.SOLUTION: The antenna control system which is compliant to an AISG (Antenna Interface Standards Group) standard and controls an antenna comprises: a terminal device 11 which controls an antenna of a radio base station; a control device 12 which transmits a control signal to the terminal device 11, controls the terminal device 11 to control the antenna, and supplies electric power to the terminal device 11; a control signal line 14 which connects the control device 12 with the terminal device 11 to transmit the control signal; a control cable 13 having a power source line 15 to supply an electric power; and an extension cable 3, which has a control signal line for extension for transmitting the control signal and a power source line for extension whose conductor resistance is smaller than that of the power source line 15, inserted in the middle of the control cable 13.
摘要翻译：要解决的问题：提供一种天线控制系统和天线控制系统扩展单元，其可以向终端设备充分地提供电力并且延伸控制设备和终端设备之间的距离。解决方案：符合AISG（天线接口标准组）标准并控制天线的天线控制系统包括：终端设备11，其控制无线电基站的天线; 向终端装置11发送控制信号的控制装置12，控制终端装置11控制天线，向终端装置11供电; 控制信号线14，其将控制装置12与终端装置11连接，发送控制信号; 具有供电电源的电源线15的控制电缆13; 以及延伸电缆3，其具有插入控制电缆13的中间的用于传输控制信号的控制信号线和用于扩展的电源线，其导体电阻小于电源线15的导体电阻。版权所有（C）2013，JPO＆INPIT

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