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    • 42. 发明授权
    • Portable terminal device with power saving information processing
    • 便携式终端设备,具有省电信息处理功能
    • US07050838B1
    • 2006-05-23
    • US09351521
    • 1999-07-12
    • Fumihiro MuramatsuTakashi Sugihara
    • Fumihiro MuramatsuTakashi Sugihara
    • H04B1/38H04M1/00
    • H04B1/1615H04W52/0274Y02D70/40
    • There is provided a portable information terminal having a built-in radio communications device which minimizes a drop in the voltage of a battery and diminishes the operation threshold voltage of the portable information terminal, thereby lengthening the operatable time of the terminal. In the portable information terminal, when a radio communications section is in a transmission state, a microprocessor of an interface and a microprocessor of an information processing section are brought into a hold state, thereby deactivating the interface and the information processing section. As a result, the operating current required during transmission can be minimized. When the radio communications section is not in a transmission state, the information processing section and the interface are activated. Even when the radio communications section is in a voice communication state and when information is not input to the information processing section for a given period of time, the information processing section and the interface are deactivated. A voltage drop due to internal resistance of the battery is diminished by distributing or reducing the electric current dissipated by operation, in accordance with operating conditions. Consequently, the portable information device can be operated even when the voltage of the battery drops, thus lengthening the operatable time.
    • 提供了一种具有内置无线电通信装置的便携式信息终端,其使电池的电压下降最小化并且减小了便携式信息终端的操作阈值电压,从而延长了终端的可操作时间。 在便携式信息终端中,当无线通信部处于发送状态时,接口的微处理器和信息处理部的微处理器进入保持状态,从而停止接口和信息处理部。 结果,可以最小化传输期间所需的工作电流。 当无线电通信部分不处于传输状态时,信息处理部分和接口被激活。 即使当无线电通信部分处于语音通信状态,并且当信息未被输入到信息处理部分给定的时间段时,信息处理部分和接口被去激活。 根据操作条件,通过分配或减少通过操作消耗的电流来减少由于电池的内部电阻引起的电压降。 因此,便携式信息装置即使在电池电压下降的情况下也可以进行操作,从而延长了可操作时间。
    • 45. 发明授权
    • Optical modulator and optical modulation method
    • 光调制器和光调制方法
    • US08638486B2
    • 2014-01-28
    • US13314553
    • 2011-12-08
    • Keisuke MatsudaTakashi SugiharaKeita MochizukiHiroshi Aruga
    • Keisuke MatsudaTakashi SugiharaKeita MochizukiHiroshi Aruga
    • G02F1/035H01S4/00
    • H04B10/5053G02F1/0123G02F1/225
    • An optical modulator includes first and second modulation waveguides, a demultiplexer, first and second phase adjustment waveguides that changes phases of a light of the first and second modulation waveguides, a multiplexer that combines light outputs from the first and second phase adjustment waveguides, a gain controller and a modulator bias controller in which voltages of the first and second modulation signals are controlled so that a result of adding light from the first modulation waveguide to light from the second modulation waveguide where light from the first modulation waveguide has a predetermined phase is equal to a result of adding light from the first modulation waveguide to light from the second modulation waveguide where light from the second modulation waveguide has a predetermined phase. A phase-adjustment bias controller that controls phase amounts changed by the first and second phase adjustment waveguides so as to cancel phase errors.
    • 光调制器包括第一和第二调制波导,多路分解器,改变第一和第二调制波导的光的相位的第一和第二相位调整波导,组合来自第一和第二相位调整波导的光输出的多路复用器,增益 控制器和调制器偏置控制器,其中控制第一和第二调制信号的电压,使得将来自第一调制波导的光添加到来自第二调制波导的光,其中来自第一调制波导的光具有预定相位是相等的 将来自第一调制波导的光添加到来自第二调制波导的光,其中来自第二调制波导的光具有预定相位。 相位调整偏置控制器,其控制由第一和第二相位调整波导改变的相位量,以消除相位误差。
    • 47. 发明申请
    • OPTICAL TRANSMITTER
    • 光学发射器
    • US20120288284A1
    • 2012-11-15
    • US13576276
    • 2010-02-25
    • Tsuyoshi YoshidaTakashi Sugihara
    • Tsuyoshi YoshidaTakashi Sugihara
    • H04B10/04
    • H04B10/50575H04B10/5053H04B10/50595
    • An optical transmitter generating an arbitrary optical waveform including an analog optical waveform, which is capable of controlling a bias to a Null point easily. The optical transmitter modulates light from a light source by an optical modulator with use of a data sequence being an electric signal, to thereby generate the arbitrary optical waveform, and includes: a light intensity detector detecting intensity of output light of the optical modulator; a data signal generator generating the data sequence; an average modulation degree calculator calculating an average modulation degree of the data sequence based on the data sequence; and a bias controller performing bias control on the optical modulator based on the intensity of the output light detected by the light intensity detector and the average modulation degree of the data sequence calculated by the average modulation degree calculator.
    • 产生包括模拟光波形的任意光波形的光发射机,其能够容易地将偏压控制到空点。 光发射机通过光调制器利用作为电信号的数据序列来调制来自光源的光,从而产生任意的光波形,并且包括:光强检测器,检测光调制器的输出光的强度; 产生数据序列的数据信号发生器; 平均调制度计算器,基于所述数据序列计算所述数据序列的平均调制度; 以及偏置控制器,基于由光强度检测器检测的输出光的强度和由平均调制度计算器计算的数据序列的平均调制度,对光调制器进行偏置控制。
    • 48. 发明申请
    • OPTICAL TRANSMITTER
    • 光学发射器
    • US20110255876A1
    • 2011-10-20
    • US13140955
    • 2010-01-13
    • Takashi SugiharaSoichiro KametaniTakashi MizuochiYoshiaki Konishi
    • Takashi SugiharaSoichiro KametaniTakashi MizuochiYoshiaki Konishi
    • H04B10/04
    • H04L27/36H04B10/5053H04B10/5055H04B10/516
    • An optical transmitter for converting an input data series into an optical multi-level signal and for outputting the same, includes an LUT in which data for executing optical multi-level modulation is stored and from which first modulation data and second modulation data are output based on the input data series. A DAC converts the first modulation data by D/A conversion to generate a first multi-level signal. A DAC converts the second modulation data by D/A conversion to generate a second multi-level signal. A dual-electrode MZ modulator includes a first phase modulator for modulating light from a light source in accordance with the first multi-level signal and a second phase modulator for modulating light from the light source in accordance with the second multi-level signal, and combines an optical signal from the first phase modulator and an optical signal from the second phase modulator to output the optical multi-level signal.
    • 用于将输入数据序列转换为光学多级信号并用于输出的光发送器包括:LUT,其中存储用于执行光学多电平调制的数据,并从其输出第一调制数据和第二调制数据 在输入数据系列上。 DAC通过D / A转换来转换第一调制数据以产生第一多电平信号。 DAC通过D / A转换来转换第二调制数据以产生第二多电平信号。 双电极MZ调制器包括用于根据第一多电平信号调制来自光源的光的第一相位调制器和用于根据第二多电平信号调制来自光源的光的第二相位调制器,以及 组合来自第一相位调制器的光信号和来自第二相位调制器的光信号以输出光多电平信号。