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    • 2. 发明授权
    • Current mirror circuit and constant current circuit having the same
    • 电流镜电路和恒流电路具有相同的功能
    • US07498868B2
    • 2009-03-03
    • US11498069
    • 2006-08-03
    • Satoshi SobueTomohisa Yamamoto
    • Satoshi SobueTomohisa Yamamoto
    • G05F1/10H02J7/00
    • G05F3/265
    • A current mirror circuit includes a pair of first and second transistors having bases connected together and emitters connected to a power line, a resistor connected between the bases of the first and second transistors and the power line, a third transistor for providing base currents of the first and second transistors and a resistor current flowing through the resistor, and a current compensation circuit that adds a compensation current to an input current to the first transistor. The amount of the compensation current is approximately equal to that of the resistor current divided by a current gain of the third transistor. Thus, the compensation current compensates the difference between a collector current of the first transistor and the input current.
    • 电流镜电路包括一对第一和第二晶体管,其具有连接在一起的基极和连接到电源线的发射极,连接在第一和第二晶体管的基极与电源线之间的电阻器,第三晶体管,用于提供基极电流 第一和第二晶体管以及流过电阻器的电阻电流,以及电流补偿电路,其向第一晶体管的输入电流增加补偿电流。 补偿电流的量大致等于电阻器电流的量除以第三晶体管的电流增益。 因此,补偿电流补偿第一晶体管的集电极电流和输入电流之间的差。
    • 3. 发明授权
    • Charge-pump circuit and a load-driving circuit utilizing the same
    • US06603673B2
    • 2003-08-05
    • US10038289
    • 2001-11-09
    • Tomohisa Yamamoto
    • Tomohisa Yamamoto
    • H02M318
    • H02M3/073
    • The present invention discloses a charge-pump circuit, which contributes to the improvement of the reliability of capacitor for boosting provided inside even under the condition where supply voltage is changed, and which also contributes to the reduction of consumption current. In this charge-pump circuit, a constant voltage generation circuit generates a reference voltage VS lower by a fixed voltage VT than a supply voltage VB of a power source +B and gives the reference voltage to a booster circuit. The booster circuit comprises an inverter circuit for alternately changing output voltage between the supply voltage VB and the reference voltage VS in response to reverse operation in synchronization with the output of an oscillation circuit, and also an inverter circuit for alternately changing output voltage between the reference voltage VS and the supply voltage VB in response to periodic reverse operation with a phase by 180° different from the phase of said inverter, whereby charging current is supplied via a diode to a first capacitor from the power source +B during the period when output of the inverter circuit is changed to the reference voltage VS, and electric charge charged on the first capacitor is shifted to the second capacitor via the diode during the period when output of the inverter circuit is changed to the reference voltage VS.
    • 5. 发明申请
    • Current mirror circuit and constant current having the same
    • 电流镜电路和恒流电流相同
    • US20070030056A1
    • 2007-02-08
    • US11498069
    • 2006-08-03
    • Satoshi SobueTomohisa Yamamoto
    • Satoshi SobueTomohisa Yamamoto
    • G05F1/10
    • G05F3/265
    • A current mirror circuit includes a pair of first and second transistors having bases connected together and emitters connected to a power line, a resistor connected between the bases of the first and second transistors and the power line, a third transistor for providing base currents of the first and second transistors and a resistor current flowing through the resistor, and a current compensation circuit that adds a compensation current to an input current to the first transistor. The amount of the compensation current is approximately equal to that of the resistor current divided by a current gain of the third transistor. Thus, the compensation current compensates the difference between a collector current of the first transistor and the input current.
    • 电流镜电路包括一对第一和第二晶体管,其具有连接在一起的基极和连接到电源线的发射极,连接在第一和第二晶体管的基极与电源线之间的电阻器,第三晶体管,用于提供基极电流 第一和第二晶体管以及流过电阻器的电阻电流,以及电流补偿电路,其向第一晶体管的输入电流增加补偿电流。 补偿电流的量大致等于电阻器电流的量除以第三晶体管的电流增益。 因此,补偿电流补偿第一晶体管的集电极电流和输入电流之间的差。
    • 7. 发明授权
    • Antireflection material and polarizing film using the same
    • 防反射材料和使用其的偏振膜
    • US06777070B1
    • 2004-08-17
    • US09581447
    • 2000-06-21
    • Chikara MurataKazuya OhishiYasuhiro MatsunagaTomohisa Yamamoto
    • Chikara MurataKazuya OhishiYasuhiro MatsunagaTomohisa Yamamoto
    • B32B2502
    • G02B1/12C08F259/08C09D4/00G02B1/11G02B1/111Y10T428/25Y10T428/31551Y10T428/31855Y10T428/31935C08F222/1006
    • An anti-reflection material and a polarization film which exhibit superior anti-reflection properties by preventing external light such as sunlight, fluorescent light, etc., from being reflected on a display, which yield a clear image without sparkling and reduces image contrast, and which exhibit superior wear resistance, chemical resistance, and contamination resistance, as well as exhibit optical stability. A hard coat layer is provided on one surface or two surfaces of a transparent substrate directly or via another layer, and an anti-reflection film having a lower refraction index than the hard coat layer is further provide on the hard coat layer. The hard coat layer consists of at least {circle around (1)} a polymer polymerizing (metha)acrylate compound having a fluorene structure; {circle around (2)} a polymer polymerizing urethane (metha)acrylate compound and ultrafine particles having a high refraction index; and {circle around (3)} radiation and/or thermosetting resin and surface-treated titanium oxide ultrafine particles.
    • 通过防止诸如阳光,荧光等的外部光在显示器上反射而表现出优异的抗反射性的抗反射材料和偏振膜,其产生清晰的图像而不闪烁并降低图像对比度;以及 其具有优异的耐磨性,耐化学性和耐污染性,并且具有光学稳定性。 直接或经由另一层在透明基板的一个表面或两个表面上设置硬涂层,并且在硬涂层上进一步提供具有比硬涂层更低的折射率的抗反射膜。 硬涂层至少包括(围绕(1个具有芴结构的聚合物聚合(甲基))丙烯酸酯化合物的圆周;(绕聚合物聚合聚合聚氨酯(甲基)丙烯酸酯化合物2)和具有高折射率的超细颗粒; {圆周(3辐射和/或热固性树脂和表面处理的氧化钛超细颗粒。
    • 8. 发明授权
    • Wave-shaping apparatus
    • 波浪形成装置
    • US5357147A
    • 1994-10-18
    • US45536
    • 1993-04-09
    • Hiroyuki InaTakashi HaradaMasakazu HondaHiroyuki BanTomohisa Yamamoto
    • Hiroyuki InaTakashi HaradaMasakazu HondaHiroyuki BanTomohisa Yamamoto
    • H03K5/08H03K5/19H03K5/153H03L7/06
    • H03K5/19
    • An input signal processing apparatus for use in a comparator which compares an input signal with a reference voltage signal to output a signal inverted in accordance with a comparison result. The apparatus detects the frequency of an input signal from a rotation detecting device such as pickup coil so that a mask time is set in accordance with the detected input signal frequency. The apparatus separates the levels of the input signal and a reference signal to the comparator for the mask time. The mask time is set so as to vary with a first predetermined rate of change when the input signal frequency is below a predetermined frequency and vary with a second predetermined rate of change greater than the first predetermined rate of change when the input signal frequency is above the predetermined frequency. This arrangement can appropriately set the mask time whereby it is possible to prevent the phase shift in waveshaping when the frequency of the input signal is high.
    • 一种在比较器中使用的输入信号处理装置,其将输入信号与参考电压信号进行比较,以输出根据比较结果反相的信号。 该装置检测来自诸如拾取线圈的旋转检测装置的输入信号的频率,使得根据检测到的输入信号频率设置掩码时间。 该装置将输入信号和参考信号的电平分离到比较器的屏蔽时间。 掩蔽时间被设定为当输入信号频率低于预定频率时以第一预定变化率变化,并且当输入信号频率高于第一预定变化幅度大于第一预定变化率的第二预定变化率时,屏蔽时间被设置 预定频率。 这种布置可以适当地设置掩模时间,由此当输入信号的频率高时,可以防止波形成形中的相移。
    • 9. 发明授权
    • Apparatus for manipulating triangular wave signals used to drive a gauge
having a pair of coils arranged in quadrature
    • 用于操纵用于驱动具有正交布置的一对线圈的量规的三角波信号的装置
    • US5121347A
    • 1992-06-09
    • US429937
    • 1989-11-01
    • Tomohisa YamamotoHiroyuki BanKatsuyuki Miyake
    • Tomohisa YamamotoHiroyuki BanKatsuyuki Miyake
    • G01P3/489G01R7/00
    • G01R7/00G01P3/489
    • An apparatus for driving a gauge having coils in quadrature to generate a resultant magnetic field in accordance with currents applied thereto and having a pointer angularly swept by the field, the apparatus having a memory to store a first data defining a relationship between a first level, indicative of the current applied to one of the coils, and an angle of the pointer. The first level has a continous waveform varying in isoceles trapezoid form over an angle range of 0.degree. to 180.degree.. The first data varies symmetrically with the isoceles trapezoid wave at the 180.degree. pointer angle over an angle range of 180.degree. to 360.degree.. The memory is arranged to store second data defining a relationship between a second level indicative of the current applied to the other coil and the pointer angle. The second level has a continuous waveform phase shifted by 90.degree. from the continuous waveform of the first data. The apparatus also has an output generator to generate output signals indicative of first and second levels related to the first and second data. A driving circuit is responsive to the output signals to drive the coils with currents proportional to the first and second levels. Each continuous waveform of the first and second data is modified so as to be cut triangularly at its corner portions.
    • 一种用于驱动具有正交线圈的量规的装置,以根据施加到其上的电流产生合成的磁场,并具有由该场被角度扫描的指针,该装置具有存储器,用于存储限定第一电平之间的关系的第一数据, 指示施加到线圈中的一个的电流以及指针的角度。 第一级在0°至180°的角度范围内具有等间距梯形变化的连续波形。 第一个数据在角度范围为180°至360°的180°指针角度处的等方梯形波对称变化。 存储器被布置为存储定义指示施加到另一个线圈的电流的第二电平与指针角度之间的关系的第二数据。 第二级具有从第一数据的连续波形偏移90°的连续波形相位。 该装置还具有输出发生器,以产生指示与第一和第二数据相关的第一和第二电平的输出信号。 驱动电路响应于输出信号以与第一和第二电平成比例的电流来驱动线圈。 第一和第二数据的每个连续波形被修改为在其角部三角形地切割。
    • 10. 发明授权
    • Method and apparatus for continuously measuring distance utilizing eddy
current and having temperature difference influence elimination
    • 使用涡流连续测量距离并具有温差影响消除的方法和装置
    • US4567435A
    • 1986-01-28
    • US583021
    • 1984-02-23
    • Takeo YamadaTomohisa YamamotoSeigo AndoYoshihiro Kawase
    • Takeo YamadaTomohisa YamamotoSeigo AndoYoshihiro Kawase
    • G01B7/00G01B7/02G01B7/14G01D3/028G01D5/20G01F23/26G01N27/90G01F23/00G01R33/12
    • G01B7/023G01B7/10G01B7/102
    • The distance between the tip of a probe and a high-temperature object of measurement is continuously and accurately measured by arranging the probe comprising a primary coil and a pair of secondary coils substantially vertically to the object of measurement; inducing an AC voltage (e.sub.1) and an AC voltage (e.sub.2) respectively in the pair of secondary coils by means of an AC magnetic field of the primary coil excited by an output voltage (e.sub.out) of a positive feedback amplifier; generating an eddy current in the object of measurement by means of the AC magnetic field of the primary coil to generate another AC magnetic field in the direction opposite to that of the AC magnetic field of the primary coil; impressing an equal DC voltage onto each of the pair of secondary coils to detect respectively a DC voltage (E.sub.1) and a DC voltage (E.sub.2) of the pair of secondary coils; calculating an error voltage (e.sub.4) corresponding to the difference in temperature between the pair of secondary coils, on the basis of the output voltage (e.sub.out) and a value of difference (E.sub.3) between the DC voltages (E.sub.1) and (E.sub.2); and feeding a value of difference (e.sub.3") between the error voltage (e.sub.4) and a value of difference (e.sub.3) between the AC voltages (e.sub.1) and (e.sub.2), back to the positive feedback amplifier, thereby determining the output voltage (e.sub.out) of the positive feedback amplifier, from which the influence of the difference in temperature between the pair of secondary coils has been eliminated.
    • 通过将包括初级线圈和一对次级线圈的探针基本垂直地布置到测量对象上,连续且精确地测量探针的尖端和高温对象物之间的距离; 通过由正反馈放大器的输出电压(eout)激励的初级线圈的AC磁场分别在一对次级线圈中产生AC电压(e1)和AC电压(e2); 通过初级线圈的交流磁场在测量对象中产生涡流,以产生与初级线圈的AC磁场相反方向的另一AC磁场; 在所述一对次级线圈中的每一个上施加相等的直流电压以分别检测所述一对次级线圈的直流电压(E1)和直流电压(E2); 基于输出电压(eout)和直流电压(E1)和(E2)之间的差值(E3)计算对应于一对次级线圈之间的温度差的误差电压(e4); 并且将误差电压(e4)和AC电压(e1)和(e2)之间的差值(e3)之间的差值(e3“)馈送回到正反馈放大器,由此确定输出电压 (eout),从而消除了一对次级线圈之间的温度差的影响。