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    • 2. 发明专利
    • Position detecting device
    • 位置检测装置
    • JP2014106142A
    • 2014-06-09
    • JP2012259733
    • 2012-11-28
    • Yamaha Corpヤマハ株式会社
    • MORISHIMA MORIHITOHATTORI ATSUO
    • G01B11/00G06F3/01G06F3/038
    • PROBLEM TO BE SOLVED: To accurately detect the position of the fingertip.SOLUTION: A position detection device 1 includes: infrared sensor modules 11 and 12 for outputting detection signals M1 and M2 corresponding to the size of an infrared ray from the fingertip; A/D converters 21 and 22 for A/D-converting the detection signals M1 and M2, and for outputting detection data D1 and D2; and a CPU 40 for generating position data Dp on the basis of the detection data D1 and D2. The infrared sensor modules 11 and 12 are respectively provided with an infrared sensor and a light reception restriction part for restricting the light reception range, and arranged in the light reception range of the other infrared sensor module.
    • 要解决的问题:准确地检测指尖的位置。解决方案:位置检测装置1包括:红外线传感器模块11和12,用于输出对应于来自指尖的红外线的尺寸的检测信号M1和M2; A / D转换器21和22,用于对检测信号M1和M2进行A / D转换,并输出检测数据D1和D2; 以及用于根据检测数据D1和D2产生位置数据Dp的CPU40。 红外线传感器模块11和12分别设置有用于限制光接收范围的红外传感器和光接收限制部,并且配置在另一个红外线传感器模块的光接收范围内。
    • 4. 发明专利
    • Δσ ad converter, class-d amplifier, and dc-dc converter
    • DeltaSigma AD转换器,CLASS-D放大器和DC-DC转换器
    • JP2008219324A
    • 2008-09-18
    • JP2007052299
    • 2007-03-02
    • Yamaha Corpヤマハ株式会社
    • MORISHIMA MORIHITO
    • H03M3/02H03F3/217H03K7/08
    • H02M3/157H03F3/2175H03M3/344H03M3/424H03M3/50
    • PROBLEM TO BE SOLVED: To provide a ΔΣ AD converter which can obtain a high dynamic range in a state that a sampling frequency of ΔΣ modulation is made to be comparatively low. SOLUTION: A subtractor 18 subtracts a feedback signal from an analog input signal. An integrator 20 integrates an output signal of the subtractor 18. A comparator 22 compares an output signal of the integrator 20 with a predetermined threshold value, and carries out binarization. A counter 24 counts a clock signal of a predetermined frequency, and measures each pulse width of an output signal of the comparator 22. Output data of the counter 24 are thinned by a predetermined sampling rate of a decimation filter 28 through a loop filter 26. Output data of the decimation filter 28 become AD conversion outputs. A PWM circuit 30 outputs an output signal of a predetermined period with a duty according to an output pulse of the loop filter 26, and the PWM signal is inputted to the subtractor 18 as the feedback signal. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种在ΔΣ调制的采样频率相对较低的状态下可以获得高动态范围的ΔΣAD转换器。 解决方案:减法器18从模拟输入信号中减去反馈信号。 积分器20对减法器18的输出信号进行积分。比较器22将积分器20的输出信号与预定阈值进行比较,并执行二值化。 计数器24对预定频率的时钟信号进行计数,并测量比较器22的输出信号的每个脉冲宽度。计数器24的输出数据通过环路滤波器26以抽取滤波器28的预定采样速率减薄。 抽取滤波器28的输出数据成为AD转换输出。 PWM电路30根据环路滤波器26的输出脉冲输出具有占空比的预定周期的输出信号,并将PWM信号作为反馈信号输入到减法器18。 版权所有(C)2008,JPO&INPIT
    • 5. 发明专利
    • Class-d amplifier
    • CLASS-D放大器
    • JP2007135177A
    • 2007-05-31
    • JP2006054716
    • 2006-03-01
    • Yamaha Corpヤマハ株式会社
    • MORISHIMA MORIHITO
    • H03F3/217H03F1/34
    • H03F3/217H03F2200/331H03F2200/351
    • PROBLEM TO BE SOLVED: To provide a class-D amplifier whose configuration is simplified and further, which is capable of performing more effective noise reduction than the prior art.
      SOLUTION: Sound data applied to an input terminal 1 are supplied through a compensation circuit 2 to a PWM circuit 3, from which a PWM signal is output. The PWM signal is converted to an analog signal through a low-pass filter 5, which is delivered to a speaker 6. On the other hand, the input sound data are delayed by a delay circuit 11, and are converted to an analog signal by a digital-to-analog converter DAC 12. The higher frequency components of the data are removed by a filter 13 and output to a differential amplifier 14, and the differential amplifier 14 amplifies a difference between an output of the low-pass filter 5 and an output of the filter 13, which is then supplied to an analog-to-digital converter ADC 15. The ADC 15 converts an output from the differential amplifier 14 to digital data, which are then supplied to the compensation circuit 2. By doing so, a compensation value based on an output from the ADC 15 is added to the following PCM sound data that are applied to the input terminal 1.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:为了提供一种D类放大器,其配置被简化并且进一步,其能够比现有技术执行更有效的降噪。

      解决方案:施加到输入端子1的声音数据通过补偿电路2提供给PWM电路3,PWM信号从该电路输出。 PWM信号通过低通滤波器5转换成模拟信号,该低通滤波器被传送到扬声器6.另一方面,输入声音数据被延迟电路11延迟,并被转换为模拟信号 数模转换器DAC 12.数据的较高频率分量由滤波器13去除,并输出到差分放大器14,差分放大器14放大低通滤波器5的输出和 滤波器13的输出,然后将其提供给模数转换器ADC 15. ADC 15将来自差分放大器14的输出转换为数字数据,然后将其提供给补偿电路2.通过这样做 将基于ADC15的输出的补偿值添加到应用于输入端子1的以下PCM声音数据中。(C)2007,JPO&INPIT

    • 6. 发明专利
    • Method, program and system for forming visible image
    • 用于形成可见图像的方法,程序和系统
    • JP2005108354A
    • 2005-04-21
    • JP2003342243
    • 2003-09-30
    • Yamaha Corpヤマハ株式会社
    • MORISHIMA MORIHITOUSUI AKIRAKONAGAI YUSUKE
    • G11B23/40G11B7/0045G11B7/007G11B7/24G11B7/26
    • G11B7/0045G11B7/24094
    • PROBLEM TO BE SOLVED: To quickly form a visible image on an optical disk without enlarging a circuit size or complicating wiring. SOLUTION: A visible image is formed on an optical disk by using an optical disk recording device for irradiating the optical disk with a laser beam to form the pit of a length regulated by recording data (EFM modulated data). At least a part of the recording data is replaced by visible image forming data, and becomes recording data including the visible image forming data. When the recording data including the visible image forming data is recorded on the optical disk, the visible image forming data is extracted from the recording data, and becomes a gate signal. A visible image is formed by forming a pit regulated by the recording data within the range of the gate signal. COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:在光盘上快速形成可见图像,而不会增加电路尺寸或使布线复杂化。 解决方案:通过使用用激光束照射光盘的光盘记录装置在光盘上形成可见图像,以形成由记录数据(EFM调制数据)调节的长度的凹坑。 记录数据的至少一部分被可见图像形成数据代替,成为包括可视图像形成数据的记录数据。 当包括可见图像形成数据的记录数据被记录在光盘上时,从记录数据中提取可视图像形成数据,并且变成门信号。 通过在栅极信号的范围内形成由记录数据调节的凹坑来形成可见图像。 版权所有(C)2005,JPO&NCIPI
    • 10. 发明专利
    • Class d amplifier circuit
    • D类放大器电路
    • JP2011077737A
    • 2011-04-14
    • JP2009225752
    • 2009-09-30
    • Yamaha Corpヤマハ株式会社
    • MORISHIMA MORIHITO
    • H03F3/217
    • PROBLEM TO BE SOLVED: To invert the output current of a class D amplifier circuit by a simple configuration.
      SOLUTION: In the class D amplifier circuit 100, a first state and a second state are switched corresponding to an input signal AIN. In the first state, after a current from a first ND1 to a second ND2 flows to a coil L in a state where the coil L and a load 30 are electrically cut off, the coil L and the load 30 are electrically connected, and the current from the first node ND1 to the second node ND2 flows to the load 30 and charged to a capacitive element C. In the second state, after a current from the second node ND2 to the first node ND1 flows to the coil L in a state where the coil L and the load 30 are electrically cut off, the coil L and the load 30 are electrically connected, and the current from the second node ND2 to the first node ND1 flows to the load 30 and charged to the capacitive element C.
      COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:通过简单的配置来反转D类放大器电路的输出电流。 解决方案:在D类放大器电路100中,对应于输入信号AIN切换第一状态和第二状态。 在第一状态下,在线圈L和负载30断电的状态下,在从第一ND1到第二ND2的电流流到线圈L之后,线圈L和负载30电连接, 从第一节点ND1到第二节点ND2的电流流到负载30并充电到电容元件C.在第二状态下,在从第二节点ND2到第一节点ND1的电流在一个状态下流到线圈L 其中线圈L和负载30被电断开,线圈L和负载30电连接,并且从第二节点ND2到第一节点ND1的电流流到负载30并充电到电容元件C. 版权所有(C)2011,JPO&INPIT