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    • 4. 发明授权
    • Motor control device and magnetic pole position estimation precision confirming method
    • 电机控制装置和磁极位置估算精度确认方法
    • US08049446B2
    • 2011-11-01
    • US12499539
    • 2009-07-08
    • Junichi Watanabe
    • Junichi Watanabe
    • H02P21/00
    • H02P21/14
    • A motor control device includes a dq-axis current control unit for generating a dq-axis voltage reference based on a dq-axis current reference and a dq-axis current signal, an initial magnetic pole position estimation unit for estimating a magnetic pole position of the motor upon power-on to generate a magnetic pole position signal, and a magnetic pole position estimation precision confirming unit for supplying a current in a d-axis direction after generation of the magnetic pole position signal with the initial magnetic pole position estimation unit, and checking an error of the magnetic pole position signal based on an angle of movement of the motor.
    • 电动机控制装置包括:dq轴电流控制单元,用于基于dq轴电流基准和dq轴电流信号生成dq轴电压基准;初始磁极位置估计单元,用于估计磁极位置的磁极位置 电动机上产生磁极位置信号;以及磁极位置估计精度确认单元,用于在与初始磁极位置估计单元产生磁极位置信号之后在d轴方向上提供电流, 并根据电动机的运动角检查磁极位置信号的误差。
    • 5. 发明申请
    • Audio control device and audio output device
    • 音频控制装置和音频输出装置
    • US20110255709A1
    • 2011-10-20
    • US13067682
    • 2011-06-20
    • Hideki NishimuraJunichi Watanabe
    • Hideki NishimuraJunichi Watanabe
    • H04R3/00G06F17/00
    • H04S1/007H04R1/005H04R5/04
    • An audio output device includes two digital microphone units that, upon receiving sound, convert the sound to PDM digital audio signals in which a state is represented by 1 or 0 in each predetermined period. The audio output device generates half-period digital audio signals, which are signals of a half period of the predetermined period, by using first digital audio signals and second digital audio signals that are the digital audio signals converted by the two digital microphones, where the states of the first digital audio signals are each reflected in one of two half periods corresponding to the predetermined period and states of the second audio signals are each reflected in the other half period. The audio output device then converts the half-period digital audio signals, which are generated by the generator, to analog audio signals and outputs the analog audio signals.
    • 音频输出装置包括两个数字麦克风单元,其在接收到声音时,将声音转换成PDM数字音频信号,其中状态在每个预定周期中以1或0表示。 音频输出装置通过使用作为由两个数字麦克风转换的数字音频信号的第一数字音频信号和第二数字音频信号,产生作为预定周期的半个周期的信号的半周期数字音频信号,其中 第一数字音频信号的状态各自被反映在对应于预定周期的两个半周期中的一个中,并且第二音频信号的状态各自反映在另一个半周期中。 然后,音频输出装置将由发生器产生的半周期数字音频信号转换为模拟音频信号并输出​​模拟音频信号。
    • 9. 发明申请
    • Method for manufacturing semiconductor device
    • 制造半导体器件的方法
    • US20050136554A1
    • 2005-06-23
    • US10835311
    • 2004-04-30
    • Yoichi OkitaJunichi WatanabeNaoya Sashida
    • Yoichi OkitaJunichi WatanabeNaoya Sashida
    • H01L27/105H01L21/00H01L21/02H01L21/326H01L21/479H01L21/82H01L21/8246
    • H01L28/57H01L27/11507
    • An Al2O3 film for covering a ferroelectric capacitor is formed by a sputtering process. The thickness of the Al2O3 film is preferably optimized according to amount of remanent polarization and fatigue tolerance required for the ferroelectric capacitor, for example, 10 nm to 100 nm. Next, oxygen is supplied to a PZT film via the Al203 film by executing a heat treatment in an oxygen atmosphere. As a result, an oxygen deficit in the PZT film is made up for. At this time, evaporation of Pb in the PZT film is suppressed because of the Al2O3 film, and deterioration of the fatigue tolerance responsive to decrease of Pb amount is suppressed. Subsequently, another Al2O3 film is formed as a second protective film by the sputtering process for opposing the deterioration factor in later process. The thickness of the Al2O3 film is preferably the thickness which sufficiently protects the ferroelectric capacitor from the deterioration factor in later wiring process.
    • 通过溅射法形成用于覆盖铁电电容器的Al 2 O 3 N 3膜。 Al 2 O 3膜的厚度优选根据强电介质电容器所需的剩余极化和耐疲劳性的量优化,例如10nm至100nm。 接着,通过在氧气氛中进行热处理,通过Al 2 O 3膜将氧气供给到PZT膜。 结果,PZT膜中的氧气缺乏。 此时,由于Al 2 O 3 O 3膜,PZT膜中的Pb的蒸发被抑制,并且抑制了响应于Pb量降低的疲劳强度的劣化 。 随后,通过溅射工艺形成另一个Al 2 O 3 3膜作为第二保护膜,用于与稍后的工艺中的劣化因子相反。 Al 2 O 3膜的厚度优选是在稍后的布线工艺中充分保护铁电电容器免受劣化因素的厚度。