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1. 发明专利

JP2003018649A Mobile communication terminal and call channel control method 有权
标题翻译：移动通信终端和呼叫信道控制方法
公开(公告)号：JP2003018649A
公开(公告)日：2003-01-17
申请号：JP2002099320
申请日：2002-04-01
申请人： Fujitsu Ltd , 富士通株式会社
发明人： ONODA MASAHIRO , TODA YOSHIFUMI
IPC分类号： H04M1/725 , H04J3/00 , H04M3/00 , H04W84/10 , H04W88/02 , H04W88/06 , H04Q7/36
摘要： PROBLEM TO BE SOLVED: To provide a call channel control method for using a plurality of frequency bands. SOLUTION: The mobile communication terminal includes a transmission/ receive unit in a first frequency band and a transmission/receive unit in a second frequency band. The mobile communication terminal receives both control channels of the first frequency band and the second frequency band by using the first transmission/receive unit for the first frequency band and the second transmission/receive unit for the second frequency band. Under the control, the mobile communication terminal waits in the control channel with the maximum receive level out of the received control channels.
摘要翻译：要解决的问题：提供一种使用多个频带的呼叫信道控制方法。解决方案：移动通信终端包括第一频带中的发送/接收单元和第二频带中的发送/接收单元。移动通信终端通过使用用于第一频带的第一发送/接收单元和用于第二频带的第二发送/接收单元来接收第一频带和第二频带的两个控制信道。在控制下，移动通信终端在接收到的控制信道中等待具有最大接收电平的控制信道。

2. 发明专利

JP2007087237A Power source classification identifying device 审中-公开
标题翻译：电源分类识别装置
公开(公告)号：JP2007087237A
公开(公告)日：2007-04-05
申请号：JP2005277124
申请日：2005-09-26
申请人： Fujitsu Ltd , 富士通株式会社
发明人： ONODA MASAHIRO
IPC分类号： G06F1/26 , H02M3/00
摘要： PROBLEM TO BE SOLVED: To automatically identify in a power source classification identifying device for identifying the classification of a power unit for supplying operation power of various electronic devices. SOLUTION: A series circuit of a no-fuse breaker 7, a resistance 6 and a switch 5 is connected between terminals T1, T2 of the electronic device 1 with the power unit connected thereto, and a DC/DC converter 3 for supplying stabilization DC voltage to an electronic circuit 2 is connected between the terminals T1, T2. A voltage drop detecting part 4 is provided at the DC/DC converter 3, and a power source classification discriminating part 8 is provided for discriminating the power unit as an exclusive power unit by detecting a voltage drop by the voltage drop detecting part 4 when voltage drop control is performed by the operation of an overcurrent protective circuit 10a of the power unit by applying a current flowing through the resistance 6 of the series circuit, and discriminates the power unit as a general-purpose power unit when the no-fuse breaker 7 is operated. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：在电源分类识别装置中自动识别用于识别用于提供各种电子设备的操作电力的功率单元的分类。解决方案：将无熔丝断路器7，电阻6和开关5的串联电路连接在与其连接的电力单元的电子设备1的端子T1，T2之间，以及DC / DC转换器3，用于向电子电路2提供稳定的DC电压连接在端子T1，T2之间。在DC / DC转换器3设置有电压降检测部4，并且设置电源类别识别部8，用于通过在压降检测部4检测到压降检测部4时的电压降来识别作为专用电源单元的电力单元通过施加流过串联电路的电阻6的电流，通过动力单元的过电流保护电路10a的动作进行落差控制，并且当无熔丝断路器7 被操作版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2001111463A METHOD FOR DETECTING ABNORMALITY OF RECEIVING CIRCUIT 失效
公开(公告)号：JP2001111463A
公开(公告)日：2001-04-20
申请号：JP29209899
申请日：1999-10-14
申请人： FUJITSU LTD
发明人： ONODA MASAHIRO
IPC分类号： H04B7/04 , H04B7/26 , H04B17/00 , H04B17/29 , H04W24/04 , H04W88/08 , H04Q7/34
摘要： PROBLEM TO BE SOLVED: To provide a receiving circuit abnormality detection system capable of easily detecting abnormality even in the operation of a receiving circuit in a PHS radio base station or the like and maintaining a base station function even when abnormality occurs. SOLUTION: Receiving circuits whose abnormality is to be detected are successively turned on correspondingly to the transmission time of a control signal from a PHS radio base station or the like, a leaked transmission signal is received from an antenna switch and the demodulation data and receiving level of the signal are checked to detect abnormality in a certain receiving circuit. When the abnormality of the receiving circuit is detected, a power supply for the receiving circuit is turned off and the receiving circuit is separated from diversity synthesis, so that the PHS radio base station function can be maintained and an alarm indicating the abnormality of the receiving circuit is reported to an external maintenance system through a line.

4. 发明专利

JPH11340896A SYNCHRONIZATION CONTROLLER 失效
公开(公告)号：JPH11340896A
公开(公告)日：1999-12-10
申请号：JP14137098
申请日：1998-05-22
申请人： FUJITSU LTD
发明人： ONODA MASAHIRO
IPC分类号： H04B17/00 , H04B7/26 , H04B17/26 , H04B17/318 , H04L7/00 , H04W56/00 , H04W88/02
摘要： PROBLEM TO BE SOLVED: To establish synchronization with respect to reception wave with high transmission quality without drastically revising the configuration of the hardware with respect to a synchronization controller that synchronizes a singe or plural reception waves which are given asynchronously. SOLUTION: This controller is provided with a synchronization means 11, that takes synchronization with a received wave coming from any one of transmission terminals with respect to the received waves arriving asynchronously through a common band for a prescribed period intermittently from a single or pluralities of the transmission terminals, a measurement means 12 that measures an electric field intensity of the received wave to store a history at a measurement period equal to an integer multiple of the prescribed period, and a predominant reception detection means 13 that specifies a point of time when the electric field strength of the received wave increases over the minimum value of permissible interference caused among the received waves which arrived in parallel from plural transmission terminals within the period which the history is taken, and the synchronization means 11 has a means that retries synchronization with respect to the received wave where that time is specified.

5. 发明专利

JPH11112366A AUTOMATIC TRANSMISSION POWER CONTROL CIRCUIT 失效
公开(公告)号：JPH11112366A
公开(公告)日：1999-04-23
申请号：JP27479497
申请日：1997-10-07
申请人： FUJITSU LTD
发明人： ONODA MASAHIRO
IPC分类号： H04B1/04 , H01Q3/26 , H03G3/30
摘要： PROBLEM TO BE SOLVED: To detect transmission output abnormality even in a state where a fault or the deterioration of a characteristic occurs in a part of a transmission circuit and transmission output does not reach a desired value and it is distorted, to eliminate the need of a transmission output abnormality detection comparison circuit, to shorten time until a system stabilizes when power is supplied and to prevent the erroneous output of a transmission output abnormality signal. SOLUTION: The output of a comparator 5 is inputted to an up/down counter 20. The up/down counter 20 integrates the output of the comparator 5. The up/down counter 20 is reset when the output of the comparator is inverted by the output of P1 . When APC (automatic transmission power control circuit) normally functions, the count value of the up/down counter 20 does not become large. When the integrated value of the up/down counter 20 exceeds the prescribed value, it is judged that an automatic transmission power control circuit function does not normally operate and the transmission output abnormality signal is outputted.

6. 发明专利

JPH0548483A FREQUENCY CONVERSION CIRCUIT 失效
公开(公告)号：JPH0548483A
公开(公告)日：1993-02-26
申请号：JP20199091
申请日：1991-08-12
申请人： FUJITSU LTD
发明人： TODA YOSHIFUMI , ONODA MASAHIRO
IPC分类号： H04B1/26 , H03J7/06
摘要： PURPOSE:To improve the frequency stability of an intermediate frequency signal by providing 1st and 2nd frequency conversion means to the conversion circuit, detecting the frequency deviation of a 2nd intermediate frequency signal from the output of the 2nd frequency conversion means and controlling the local oscillation frequency of the 1st and 2nd frequency conversion means based on the deviation. CONSTITUTION:When the frequency stability of a reception signal is high, only a frequency deviation DELTAfL1 of a 1st local oscillation signal appears as a frequency deviation at a conversion output of the 1st frequency conversion means 11 and a frequency deviation DELTAfL1 of the 1st local oscillation signal and a frequency deviation DELTAfL2 of the 2nd local oscillation signal appear at a conversion output of a 2nd frequency conversion means 12. Then the frequency deviations DELTAfL1, DELTAfL2 are detected from a frequency difference detection means 13. Based on the detection output, the 1st and 2nd local oscillation frequencies are controlled by the frequency control means 14 from the frequency difference detection means 13, then the frequency deviations DELTAfL1, DELTAfL2 are eliminated from the conversion output of the frequency conversion means 12. Thus, even when the frequency stability of the reference oscillation circuit is low, the 2nd intermediate frequency signal with high frequency stability is obtained.

7. 发明专利

JPH08191224A MOBILE COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH08191224A
公开(公告)日：1996-07-23
申请号：JP188295
申请日：1995-01-10
申请人： FUJITSU LTD
发明人： KAWANO OSAMU , TODA YOSHIFUMI , MOTOSUNA HIDEKI , ONODA MASAHIRO
IPC分类号： H03G3/20 , H03G3/30 , H04B7/26
摘要： PURPOSE: To reduce the size, weight and power consumption of this mobile communication equipment by allowing drain voltage to be supplied to a power amplifier constituting a transmission part in accordance with a transmission power control signal. CONSTITUTION: The transmission part 32 is provided with a gate voltage setting circuit 323 and a drain voltage setting circuit 324 and the gate voltage VG and drain voltage VD of the power amplifier 322 are variably set up by a power control signal PCS received from a control circuit 20 through a time- division multiplexing/separating circuit 23. In the case of reducing transmission power from the maximum power in accordance with transmission power control, the input power of the amplifier 322 is reduced by a variable attenuator 321 in accordance with the power control signal PCS outputted from the circuit 20. In this case, the drain voltage VD of the amplifier 322 is also dropped to within a fixed voltage range by a drain voltage setting circuit 324 in accordance with the signal PCS. Consequently the efficiency of the power amplifier 322 at the time of maximum transmission can be held also at the time of controlling transmission power.

8. 发明专利

JPH0465906A PARALLEL OPERATION POWER AMPLIFIER 失效
公开(公告)号：JPH0465906A
公开(公告)日：1992-03-02
申请号：JP17477090
申请日：1990-07-02
申请人： FUJITSU LTD
发明人： ONODA MASAHIRO , TODA YOSHIFUMI
IPC分类号： H03G3/20 , H03F3/68 , H03G3/30
摘要： PURPOSE:To suppress a change in a gain of the entire amplifier by allowing the power amplifier in operation to recognize number of sets in operation from operation/stop information and varying the gain according to number of sets. CONSTITUTION:A control circuit 26 adjusts a variable attenuator 12 of a pre- stage of an amplifier 13 so that the gain of the power amplifier is a prescribed value. Since operation/stop information sets S(2)-Sn of other power amplifier are inputted to the control circuit 26, the circuit 26 grasps number of sets of power amplifiers in operation actually and varies the reference voltage REF given to a buffer 23 in response to number of the sets in operation. A setting value of an attenuator 12 is varied when a voltage difference of two inputs to a differential amplifier 24 is zero. Thus, even when number of parallel sets in operation is changed, the variance in the gain of the entire system is suppressed.

9. 发明专利

JPH0366232A TRANSMITTER-RECEIVER FOR ON-VEHICLE COMMUNICATION 失效
公开(公告)号：JPH0366232A
公开(公告)日：1991-03-20
申请号：JP20302389
申请日：1989-08-04
申请人： FUJITSU LTD
发明人： ONODA MASAHIRO , SASAKI SUSUMU
IPC分类号： H04B1/3822 , H04B1/40 , H04B1/44 , H04B7/26 , H04W56/00 , H04W88/06
摘要： PURPOSE:To decrease the loss of a transmission signal and a reception signal by selecting a band pass filter having a large gradient in the attenuation in the FDMA system and applying the transmission and reception at a separate time, and selecting a band pass filter having a small loss and a small gradient in the attenuation in the TDMA system. CONSTITUTION:Band pas filters 41, 51 with many number of stages are employed for the use of the FDMA system to increase the gradient in the attenuation near the border of transmission and reception frequencies and band pass filters 42, 52 with less number of stages are employed for the use of the TDMA system to decrease the loss. A signal is sent/received in a time slot assigned to a transmitter-receiver in the TDMA system, the signal is sent through an incoming line by a transmission reception antenna via the band pass filter 42 and a transmission reception changeover switch 64 and the signal is received through an outgoing line by the transmission reception changeover switch 64 and the band pass filter 52 and inputted to a demodulator 23.

10. 发明专利

JPH09289482A FAULT DETECTION METHOD AND DEVICE FOR RADIO SYSTEM 失效
公开(公告)号：JPH09289482A
公开(公告)日：1997-11-04
申请号：JP10270296
申请日：1996-04-24
申请人： FUJITSU LTD
发明人： ONODA MASAHIRO , YONEDA TSUYOSHI , OKADA MASAAKI
IPC分类号： H04B17/00 , H04B7/06 , H04B7/26 , H04B17/16 , H04B17/29 , H04W24/00 , H04W88/02
摘要： PROBLEM TO BE SOLVED: To provide an antenna breakage detection method which is available regardless of types of used antennas and also can be applied to a reception-only branch by calculating the time average at every fixed time between the highest reception level and a reception level excluding the highest one among the reception levels of input signals and then detecting a fault of a radio system when the value obtained through subtraction carried out among the time averages is larger than the prescribed threshold. SOLUTION: The reception levels are almost equal to each other at the same time point among the signals which are received at the reception parts 1 to 4 via antennas ATN1 to ATN4 of a PHS base station. On the other hand, the reception level of the signal received at the reception part via a broken antenna is lower than that of the signal received via a normal antenna. A demodulation part 5 includes a circuit which detects the reception part that receives the highest reception level. Then the breakage of an antenna can be decided if a non-selected reception part is detected based on the detection result of the said circuit of the part 5.

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