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    • 2. 发明授权
    • Peak-hold circuit and signal strength indicator using the peak-hold circuit
    • 峰值保持电路和信号强度指示器使用峰值保持电路
    • US07853226B2
    • 2010-12-14
    • US11979679
    • 2007-11-07
    • Manabu HirataTakashi TayaKazuyuki Tajima
    • Manabu HirataTakashi TayaKazuyuki Tajima
    • H04B1/16
    • H03F3/45
    • A peak-hold circuit includes a differential amplifier having first and second transistors as a differential pair, the first transistor receiving an input signal at its gate, a third transistor connected between a first power supply and an output node connecting a gate of the second transistor, connectivity of the third transistor being controlled by the output of the differential amplifier, a capacitor for holding a peak voltage, connected between the output node and a second power supply, a resistor for discharging, which is connected in parallel to the capacitor, and a fourth transistor connected to the first transistor in parallel, the fourth transistor receiving at its gate an a reference voltage for limiting a voltage.
    • 峰值保持电路包括具有作为差分对的第一和第二晶体管的差分放大器,第一晶体管在其栅极接收输入信号,连接在第一电源和连接第二晶体管的栅极的输出节点之间的第三晶体管 连接在输出节点和第二电源之间的用于保持峰值电压的电容器,与电容器并联连接的用于放电的电阻器,以及 第四晶体管并联连接到第一晶体管,第四晶体管在其栅极处接收用于限制电压的参考电压。
    • 4. 发明授权
    • Voltage controlled oscillator
    • 压控振荡器
    • US07679467B2
    • 2010-03-16
    • US11346296
    • 2006-02-03
    • Manabu HirataYoichi FuekiKazuyuki Tajima
    • Manabu HirataYoichi FuekiKazuyuki Tajima
    • H03K3/03
    • H03L7/0995
    • A voltage controlled oscillator which performs an oscillating operation at a frequency corresponding to a control voltage, includes a voltage-current converter circuit which converts the control voltage to a control current corresponding to a voltage value thereof, and a ring oscillator through which an operating current corresponding to the control current generated by the voltage-current converter circuit is caused to flow, and which oscillates at a frequency corresponding to a current value thereof. The voltage-current converter circuit has a voltage-voltage converting circuit which inputs the control voltage therein and converts the same to a control current corresponding to the voltage value thereof, and an offset current generating circuit which adds a constant current to the control current.
    • 以与控制电压对应的频率进行振荡动作的压控振荡器包括:电压 - 电流转换器电路,其将控制电压转换为对应于其电压值的控制电流;以及环路振荡器,通过该振荡器,工作电流 与由电压 - 电流转换器电路产生的控制电流相对应地流过,并以与其电流值对应的频率振荡。 电压 - 电流转换器电路具有输入其中的控制电压的电压 - 电压转换电路,并将其转换成与其电压值相对应的控制电流,以及将恒定电流加到控制电流上的偏移电流产生电路。
    • 8. 发明申请
    • Peak-hold circuit and signal strength indicator using the peak-hold circuit
    • 峰值保持电路和信号强度指示器使用峰值保持电路
    • US20080164913A1
    • 2008-07-10
    • US11979679
    • 2007-11-07
    • Manabu HirataTakashi TayaKazuyuki Tajima
    • Manabu HirataTakashi TayaKazuyuki Tajima
    • G01R19/00
    • H03F3/45
    • A peak-hold circuit includes a differential amplifier having first and second transistors as a differential pair, the first transistor receiving an input signal at its gate, a third transistor connected between a first power supply and an output node connecting a gate of the second transistor, connectivity of the third transistor being controlled by the output of the differential amplifier, a capacitor for holding a peak voltage, connected between the output node and a second power supply, a resistor for discharging, which is connected in parallel to the capacitor, and a fourth transistor connected to the first transistor in parallel, the fourth transistor receiving at its gate an a reference voltage for limiting a voltage.
    • 峰值保持电路包括具有作为差分对的第一和第二晶体管的差分放大器,第一晶体管在其栅极接收输入信号,连接在第一电源和连接第二晶体管的栅极的输出节点之间的第三晶体管 连接在输出节点和第二电源之间的用于保持峰值电压的电容器,与电容器并联连接的用于放电的电阻器,以及 第四晶体管并联连接到第一晶体管,第四晶体管在其栅极处接收用于限制电压的参考电压。
    • 9. 发明授权
    • Position adjusting apparatus for image reader unit
    • 图像读取器单元的位置调整装置
    • US5933248A
    • 1999-08-03
    • US947485
    • 1997-10-10
    • Manabu Hirata
    • Manabu Hirata
    • G02B26/10G03B27/50H04N1/028H04N1/03H04N1/04H04N1/00
    • H04N1/03H04N2201/02416
    • A mechanism for facilitating necessary axial adjustments for an image reader unit with a simple arrangement and operation. The image reader unit 2, on which a sensor 4 and a lens 6 are joined to each other in a specific positional relationship along the optical axis L, is so held by a supporting mechanism 41 that the image reader unit 2 can rotate at the lens side about an axis R of rotation which is parallel to the optical axis L and can swing at the sensor side vertically about a pivotal point P which is located on the axis R. A height adjusting mechanism 42 rotatably supports the image reader unit 2 at the sensor side and adjusts its height, and a tilt adjusting mechanism 43 adjusts the inclination of the image reader unit 2 by rotation around the axis R.
    • 用于以简单的布置和操作促进图像读取器单元的必要的轴向调整的机构。 传感器4和透镜6沿着光轴L以特定的位置关系彼此接合的图像读取器单元2被支撑机构41保持,使得图像读取器单元2可以在透镜 一侧围绕平行于光轴L的旋转轴线R,并且能够绕位于轴线R上的枢转点P垂直绕传感器侧摆动。高度调节机构42将图像读取器单元2可旋转地支撑在 传感器侧并调节其高度,并且倾斜调节机构43通过围绕轴线R旋转来调整图像读取器单元2的倾斜度。
    • 10. 发明申请
    • LOAD DRIVING DEVICE
    • 负载驱动装置
    • US20100097737A1
    • 2010-04-22
    • US12581589
    • 2009-10-19
    • Manabu HIRATASatoki UrunoHiroki KishiJunichi MatsubaraYuichiro MoriMichiyoshi Shimizu
    • Manabu HIRATASatoki UrunoHiroki KishiJunichi MatsubaraYuichiro MoriMichiyoshi Shimizu
    • H02H3/08
    • H02H7/0816H02H7/0838
    • A load driving device including a semiconductor switch arranged in a current path extending from a power supply to a load. A control circuit controls activation and deactivation of the semiconductor switch. The control circuit deactivates the semiconductor switch when it is determined that overcurrent is flowing through the current path. A current detector detects current that is flowing through the current path. The control circuit determines that overcurrent is flowing when the current detector continuously detects current that is greater than a threshold value over a predetermined detection time. The detection time is set to be shorter than the time from when the current in the current path exceeds the threshold value to when an increase in resistance value of the semiconductor switch resulting from heat generated by the current lowers the current to the threshold value.
    • 一种负载驱动装置,包括布置在从电源延伸到负载的电流路径中的半导体开关。 控制电路控制半导体开关的激活和去激活。 当确定过电流流过电流路径时,控制电路使半导体开关去激活。 电流检测器检测流过电流路径的电流。 当电流检测器在预定检测时间内连续地检测到大于阈值的电流时,控制电路确定过电流正在流动。 检测时间被设定为短于从电流通路中的电流超过阈值的时间到由电流产生的热导致的半导体开关的电阻值的增加将电流降至阈值的时间。