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1. 发明专利

JP2000082975A CDMA RECEIVER 失效
公开(公告)号：JP2000082975A
公开(公告)日：2000-03-21
申请号：JP25268798
申请日：1998-09-07
申请人： FUJITSU LTD
发明人： HAGA YOSHINOBU , MIKAMI TAKU
IPC分类号： H04B1/707 , H04B1/7117 , H04B7/26 , H04L7/00 , H04W52/02 , H04W88/02
摘要： PROBLEM TO BE SOLVED: To reduce power consumption and to improve the detection precision of inverse spread start timing. SOLUTION: A reception state detection part (RSSI detection part) 60 detects a reception state. A sampling control part 61 decides the number of over-samples (sampling speed) of a matched filter 58 in accordance with the quality of the reception state. The matched filter 58 operates a correlation value between a received spread data string sampled at the sampling speed and a reference code string (short code). A timing detection part 59 sets timing when the correlation value becomes maximum to be inverse spread start timing. A sampling control part 61 reduces the number of over-samples when the reception state is good, drops the operation speed of the matched filter 58, reduces power consumption, increases the number of over-sampling when the reception state is bad so as to improve the detection precision of inverse spread timing.

2. 发明专利

JPH0823229A MULTIPLIED OSCILLATION CIRCUIT 失效
公开(公告)号：JPH0823229A
公开(公告)日：1996-01-23
申请号：JP15707594
申请日：1994-07-08
申请人： FUJITSU LTD
发明人： SASAKI AKIO , TANAKA SADANORI , HAGA YOSHINOBU , UEDA HIROKAZU , KISHIGAMI KAZUNARI
IPC分类号： H03B5/12 , H03B5/18
摘要： PURPOSE:To improve power efficiency of a multiplied oscillation circuit by attaining an operation which oscillates by the frequency of a fundamental wave and an operation which amplifies the desired one of those higher frequency waves generated by the oscillating operation with a single transistor. CONSTITUTION:This oscillation circuit can perform both oscillating and amplifying operations by a single transistor TR Q1 in Colpitts oscillation form. Thus the 1st and 2nd circuit parts 12a and 13a consisting of the concentrated constant elements are connected to the emitter and the collector of the TR Q1. Then the output of a doubled frequency wave is taken out of the collector. Each of both parts 12a and 13a consists of a coil and a capacitor, and the tuning frequency of parts 12a and 13a are set at f0 and 2f0 respectively. Thus the emitter and collector have high and low impedances respectively with the frequency f0 and vice versa with the frequency 2f0. In such a constitution, a collector-grounded Colpitts oscillator is secured to a basic wave of frequency f0 and an emitter-grounded amplifier is secured to the double wave respectively. Then the doubled frequency wave existing at the base of the TR Q1 is amplified and outputted from the collector.

3. 发明专利

JP2012195784A Wireless communication device and power saving control method 有权
标题翻译：无线通信设备和省电控制方法
公开(公告)号：JP2012195784A
公开(公告)日：2012-10-11
申请号：JP2011058489
申请日：2011-03-16
申请人： Fujitsu Ltd , 富士通株式会社
发明人： HAGA YOSHINOBU , UCHIUMI TAKESHI , TSURUTA KENJI , KIMURA YOSHIKATSU , TAKASE FUMIO , SHIBAYAMA ATSUSHI , ISHIKAWA TAKAHISA , YAMAGISHI MIKIMASA
IPC分类号： H04M1/73 , H04W52/02 , H04W88/02
CPC分类号： Y02D70/00 , Y02D70/12 , Y02D70/122 , Y02D70/124 , Y02D70/126
摘要： PROBLEM TO BE SOLVED: To provide a wireless communication device and a power saving control method capable of suppressing the power consumption effectively.SOLUTION: A wireless communication device comprises: an application processor (2) executing an application for processing input information supplied from a user interface depending on user's operation; and a communication processor (1) performing the processing related to the user interface to substitute for the application processor (2) in a state that the application processor (2) halts.
摘要翻译：解决的问题：提供能够有效抑制功耗的无线通信装置和省电控制方法。解决方案：一种无线通信设备，包括：应用处理器（2），用于根据用户的操作执行用于处理从用户界面提供的输入信息的应用; 以及通信处理器（1），在所述应用处理器（2）停止的状态下执行与所述用户界面相关的处理以代替所述应用处理器（2）。版权所有（C）2013，JPO＆INPIT

4. 发明专利

JP2000151486A DIVERSITY RECEIVER AND ITS METHOD 失效
公开(公告)号：JP2000151486A
公开(公告)日：2000-05-30
申请号：JP31879398
申请日：1998-11-10
申请人： FUJITSU LTD
发明人： TOMIYOSHI TOKUO , MIKAMI TAKU , HAGA YOSHINOBU , YAMANO OSAMU
IPC分类号： H04J13/00 , H04B1/7117 , H04B7/08 , H04B7/26 , H04W16/28 , H04W28/18 , H04W88/02
摘要： PROBLEM TO BE SOLVED: To provide a configuration for a diversity reception circuit that requires only a small space and low current consumption. SOLUTION: An antenna changeover device 1 alternately selects a signal from an antenna A or B at a prescribed speed. The signal from the antenna A or B is given alternately to a radio reception section 2. The radio reception section 2 applies orthogonal detection to the signal received by the antennas A, B and gives the result to a branch selection section 4. The branch selection section 4 extracts either of the signal from the antennas A and B alternately placed temporally by an instruction of a searcher 7 and gives the extracted signal to a matched filter 6. The searcher 7 acquires an inverse spread timing from a correlation value and stores it to memories 12-1, 12-2. The searcher 7 acquires the inverse spread timing of a higher correlation value and gives it to an inverse spread section 3, where the signal is rake-received.

5. 发明专利

JPH09139601A HIGH FREQUENCY SWITCH 失效
公开(公告)号：JPH09139601A
公开(公告)日：1997-05-27
申请号：JP29585695
申请日：1995-11-14
申请人： FUJITSU LTD
发明人： HAGA YOSHINOBU , UEDA HIROKAZU , KAWAI SHINICHI , SAITO MASAAKI
IPC分类号： H01P1/15 , H03K17/76 , H04B1/44
摘要： PROBLEM TO BE SOLVED: To provide the high frequency switch of low insertion loss and high isolation by forming this switch so that a parallel PIN diode may likely be released when the switch is turned on but it may likely be short-circuited when the switch is turned off. SOLUTION: PIN diodes D1 and D2 are serially and parallelly arranged, and the parallel PIN diode D2 is connected by the line of λ/4 use frequency. Since when the switch is turned on, the respective PIN diodes D1 and D2 are turned on, a transmission line is turned into through state and the top end of the λ/4 line is short-circuited, the λ/4 line 4 on the side of the transmission line 1 is opened, and only the insertion loss of the serial PIN diode D1 is observed. When the switch is turned off, the respective PIN diodes D1 and D2 are turned off, the serial PIN diode D1 is turned into high resistance state, and the top end of the λ/4 line is opened at such a time. Therefore, the λ/4 line on the side of the transmission line 1 is short-circuited, and the high isolation state is provided by such an attenuation factor.

6. 发明专利

JPH0738456A MICROWAVE MIXER CIRCUIT 失效
公开(公告)号：JPH0738456A
公开(公告)日：1995-02-07
申请号：JP18053893
申请日：1993-07-22
申请人： FUJITSU LTD
发明人： HAGA YOSHINOBU
IPC分类号： H03D7/12 , H04B1/26
摘要： PURPOSE:To obtain a mixer circuit capable of adjusting dispersion in the characteristic of a FET by adopting only one polarity of a DC bias deciding an operating point of the FET. CONSTITUTION:A DC bias voltage -VG is applied to a gate G of a FET together with a radio signal through an impedance matching circuit 11 and a local carrier LOin is inputted directly to a drain D through a filter 22 and an impedance matching circuit 23. The FET is operated in an unsaturation region of a drain current Id so that the local carrier is rectified and a self- rectifier current flows to a source S connecting to ground from the drain. The dispersion in the statistic characteristic of the FET is compensated by changing a sum (VB+VD-VG) of a built-in voltage VB of the Rate deciding an intermediate frequency component IdIF included in a drain current Id changed through the dispersion, a DC bias voltage +VD and a DC bias voltage -VG of the Sate G through the chance in the DC bias voltage -VG of the gate G.

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