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    • 51. 发明授权
    • Pickup apparatus and method for laser beams having different wavelengths
    • 具有不同波长的激光束的拾取装置和方法
    • US5956312A
    • 1999-09-21
    • US910005
    • 1997-08-12
    • Hiroyuki Ishihara
    • Hiroyuki Ishihara
    • G11B7/135G11B7/00G11B7/12G11B7/125
    • G11B7/127G11B7/123G11B2007/0006
    • There is provided an optical pick-up apparatus including (a) a plurality of light emitting devices emitting laser beams having different wavelengths, (b) inclined reflective surfaces by the same number as that of the light emitting devices for reflecting the laser beams, (c) the same number of optical systems for image-formation as that of the light emitting devices, each of the optical systems being disposed just above each of the inclined reflective surfaces, each of the optical systems focusing the laser beams reflected at the inclined reflective surfaces on an optical disk medium and transmitting therethrough the laser beams reflected from the optical disk medium, and (d) a light receiving device receivable all of the reflected laser beams. In accordance with the above mentioned optical pick-up apparatus, all laser beams emitted from the light emitting devices and reflected from the optical disc medium are received in the common light receiving device. Hence, all data stored in the laser beams can be processed by a single light receiving device, which ensures the reduction in the number of parts for constituting an optical pick-up apparatus and hence the reduction in fabrication costs. In addition, it is also ensured to fabricate an optical pick-up apparatus in a smaller size.
    • 提供了一种光拾取装置,包括:(a)发射具有不同波长的激光束的多个发光装置,(b)与用于反射激光束的发光装置相同数量的倾斜反射面; c)与发光器件相同数量的用于成像的光学系统,每个光学系统设置在每个倾斜反射表面的正上方,每个光学系统聚焦在倾斜反射面处反射的激光束 光盘介质上的表面,并且透过从光盘介质反射的激光束,以及(d)可接收所有反射的激光束的光接收装置。 根据上述光学拾取装置,从公共光接收装置接收从发光装置发射并从光盘介质反射的所有激光束。 因此,存储在激光束中的所有数据可以由单个光接收装置处理,这确保了用于构成光学拾取装置的部件数量的减少,从而降低了制造成本。 此外,还确保制造更小尺寸的光学拾取装置。
    • 52. 发明授权
    • Frequency converter capable of eliminating local power leak
    • 变频器能够消除局部电力泄漏
    • US4355420A
    • 1982-10-19
    • US212208
    • 1980-12-02
    • Hiroyuki Ishihara
    • Hiroyuki Ishihara
    • H03D7/00H03D7/02H03D7/14H04B1/26H04B1/10
    • H03D7/02
    • A frequency converter has first, second and third terminals which receive a first signal having a first frequency band, a local oscillation signal, and a second signal having a second frequency band. The first signal and the local oscillation signal are mixed to generate the second signal. A first branching circuit is connected between the second terminal and the frequency mixer, for branching part of the local oscillation signal. A first part of the branched local oscillation signal, which is supplied from the first branching circuit, and a first leaked local oscillation signal are applied from the frequency mixer to the first terminal. The phase and amplitude of the first branched local oscillation signal are adjusted so that the first branched local oscillation signal and the first leaked local oscillation signal have equal amplitude and are reversed in phase to cancel each other.
    • 频率转换器具有接收具有第一频带的第一信号,本地振荡信号和具有第二频带的第二信号的第一,第二和第三端子。 第一信号和本地振荡信号被混合以产生第二信号。 第一分支电路连接在第二端子和混频器之间,用于分支局部振荡信号的一部分。 从第一分支电路提供的分支本机振荡信号的第一部分和第一泄漏本地振荡信号从混频器施加到第一端子。 调整第一分支本机振荡信号的相位和振幅,使得第一分支本地振荡信号和第一泄露本地振荡信号具有相等的振幅并相位反转以相互抵消。
    • 56. 发明申请
    • WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION DEVICE
    • 无线通信系统和无线通信设备
    • US20130272277A1
    • 2013-10-17
    • US13884361
    • 2011-11-10
    • Yutaka SuwaHiroyuki IshiharaAkira Shibuta
    • Yutaka SuwaHiroyuki IshiharaAkira Shibuta
    • H04W74/08
    • H04W74/0816H04B7/2643H04W16/14H04W52/0216H04W56/0015H04W88/06H04W88/10Y02D70/1222Y02D70/142Y02D70/144Y02D70/449
    • In a wireless communication system that conducts a communication between a base station and a terminal the base station includes a first communication unit using a first communication system of a TDMA system, and a second communication unit using a second communication system, and the terminal includes a third communication unit using the first communication system, and a fourth communication unit using the second communication system. The base station transmits a control signal in the first communication system with the use of the first communication unit, and the base station determines timing of transmission for the second communication unit according to timing of TDMA of the first communication unit. The third communication unit receives the control signal transmitted from the base station in the first communication system, and the fourth communication unit controls receiving operation according to information included in the control signal.
    • 在进行基站和终端之间的通信的无线通信系统中,基站包括使用TDMA系统的第一通信系统的第一通信单元和使用第二通信系统的第二通信单元,并且终端包括 使用第一通信系统的第三通信单元,以及使用第二通信系统的第四通信单元。 基站使用第一通信单元在第一通信系统中发送控制信号,并且基站根据第一通信单元的TDMA的定时确定第二通信单元的发送定时。 第三通信单元接收在第一通信系统中从基站发送的控制信号,第四通信单元根据包含在控制信号中的信息控制接收操作。
    • 58. 发明申请
    • WIRELESS COMMUNICATION DEVICE AND WIRELESS COMMUNICATION SYSTEM
    • 无线通信设备和无线通信系统
    • US20110261869A1
    • 2011-10-27
    • US13142218
    • 2009-12-25
    • Yutaka SuwaHiroyuki Ishihara
    • Yutaka SuwaHiroyuki Ishihara
    • H04W4/00H04B17/00H04W24/00
    • H04L1/0009G10L19/005H04L1/0014H04L1/0061
    • The present invention provides a wireless communication device and a wireless communication system which can improve the error detection accuracy with the sound quality maintained to some extent even if the communication environment is deteriorated. A cordless phone establishes a digital link on a wireless channel between a master device and a slave device, compresses a sound signal in an ADPCM scheme, and carries the sound signal in a sound packet to perform communication. In a master device side, a PCM signal is converted into ADPCM data by an ADPCM encoding unit. Next, the least significant bit of n-bits is set according to the number of “1” of the n-bits of the ADPCM data by a transmission conversion table. In a slave device side, it is determined whether an error has occurred according to the number of “1” of the n-bit data in received data. If the error exists, the n-bit sound data is converted into mute data through a reception conversion table. The sound data converted through the reception conversion table is converted into a PCM signal from an ADPCM format by an ADPCM decoding unit.
    • 本发明提供一种无线通信装置和无线通信系统,即使通信环境恶化,也可以在一定程度上保持声音质量来提高错误检测精度。 无绳电话在主设备和从设备之间的无线信道上建立数字链路,以ADPCM方案压缩声音信号,并将声音信号携带在声音包中以进行通信。 在主设备侧,通过ADPCM编码单元将PCM信号转换成ADPCM数据。 接下来,通过传输转换表,根据ADPCM数据的n位的数量“1”来设置n位的最低有效位。 在从设备侧,根据接收到的数据中的n位数据的“1”数确定是否发生错误。 如果存在错误,则通过接收转换表将n位声音数据转换为静音数据。 通过接收转换表转换的声音数据由ADPCM解码单元从ADPCM格式转换为PCM信号。