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公开(公告)号：US08589964B2
公开(公告)日：2013-11-19
申请号：US11191939
申请日：2005-07-29
IPC分类号： G11B7/00
CPC分类号： H05K1/0209 , G11B7/0935 , G11B7/12 , H05K1/0206 , H05K1/189 , H05K2201/055 , H05K2201/09781 , H05K2201/10689 , H05K2201/10969
摘要： Provided is a reliable optical pick-up which can prevent deterioration of a performance of a component, shortening of a service life or malfunctioning due to heat generation of an laser driver IC, wherein a metallic pattern is provided on a flexible printed board, having an area wider than the external shape of the laser driver IC and having an exposed outer surface, and made of the same material as that of a wiring pattern. It is preferable to bend the flexible printed board in a mounting part for the laser driver IC so that the metallic pattern is faced to and superposed with a surface of the flexible printed board on the side remote from the surface on which the laser driver IC is mounted.
摘要翻译： 提供了一种可靠的光学拾取器，其可以防止部件性能的劣化，使用寿命缩短或者由于激光驱动器IC的发热引起的故障，其中金属图案设置在柔性印刷电路板上，具有 区域比激光驱动IC的外形宽，外露面外露，并且由与布线图案相同的材料制成。 优选地，将柔性印刷电路板弯曲成用于激光驱动IC的安装部分，使得金属图案面对并与柔性印刷电路板的远离激光驱动器IC表面的一侧的表面重叠 安装。
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公开(公告)号：US4748422A
公开(公告)日：1988-05-31
申请号：US770
申请日：1987-01-06
CPC分类号： H03H11/1291 , H03G1/0023 , H03H11/20
摘要： An amplifier suitable for use as an active filter such as a low-pass filter, a high-pass filter or a phase shifter, which can be easily formed as part of an integrated circuit. The amplifier includes first and second transistors, which together form a first differential amplifier for converting the voltage of the input signal thereto to a signal current. It also includes third and fourth transistors, which together form a second differential amplifier for dividing the signal current from the second transistor in a given ratio. A capacitor is connected to the collector of the fourth transistor, and first and second resistors are connected, respectively, to emitters of the first and second transistors. The current division ratio of the current flowing through the third and fourth transistors is controlled by a control voltage DC supplied to the base of the third transistor and the base of the fourth transistor. In the amplifier, the signal current shunted in the current division ratio K between the third and fourth transistors flow through the load capacitor so that the time constant of the active filter is controlled, the ratio K being controlled by the control voltage V.sub.c. The control voltage V.sub.c also compensates for the inaccuracy of the values of the resistors and capacitors.
摘要翻译： 适合用作有源滤波器的放大器，例如低通滤波器，高通滤波器或移相器，其可以容易地形成为集成电路的一部分。 放大器包括第一和第二晶体管，它们一起形成第一差分放大器，用于将输入信号的电压转换成信号电流。 它还包括第三和第四晶体管，它们一起形成一个第二差分放大器，以给定的比例分配来自第二晶体管的信号电流。 电容器连接到第四晶体管的集电极，第一和第二电阻分别连接到第一和第二晶体管的发射极。 流过第三和第四晶体管的电流的当前分频比由提供给第三晶体管的基极和第四晶体管的基极的控制电压DC控制。 在放大器中，以第三和第四晶体管之间的当前分频比K分流的信号电流流过负载电容器，从而控制有源滤波器的时间常数，比例K由控制电压Vc控制。 控制电压Vc也补偿了电阻和电容值的不准确性。
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公开(公告)号：US20060117332A1
公开(公告)日：2006-06-01
申请号：US11191939
申请日：2005-07-29
CPC分类号： H05K1/0209 , G11B7/0935 , G11B7/12 , H05K1/0206 , H05K1/189 , H05K2201/055 , H05K2201/09781 , H05K2201/10689 , H05K2201/10969
摘要： Provided is a reliable optical pick-up which can prevent deterioration of a performance of a component, shortening of a service life or malfunctioning due to heat generation of an laser driver IC, wherein a metallic pattern is provided on a flexible printed board, having an area wider than the external shape of the laser driver IC and having an exposed outer surface, and made of the same material as that of a wiring pattern. It is preferable to bent the flexible printed board in a mounting part for the laser driver IC so that the metallic pattern is faced to and superposed with a surface of the flexible printed board on the side remote from the surface on which the laser driver IC is mounted.
摘要翻译： 提供了一种可靠的光学拾取器，其可以防止部件性能的劣化，使用寿命缩短或者由于激光驱动器IC的发热引起的故障，其中金属图案设置在柔性印刷电路板上，具有 区域比激光驱动IC的外形宽，外露面外露，并且由与布线图案相同的材料制成。 优选地，将柔性印刷电路板弯曲在用于激光驱动IC的安装部分中，使得金属图案面对并与柔性印刷电路板的远离激光驱动器IC的表面的一侧的表面重叠 安装。
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公开(公告)号：US4994915A
公开(公告)日：1991-02-19
申请号：US349869
申请日：1989-05-10
申请人： Satoshi Takahashi , Eiji Takagi , Yukinari Ueki , Hideaki Ohki , Koji Kamogawa
发明人： Satoshi Takahashi , Eiji Takagi , Yukinari Ueki , Hideaki Ohki , Koji Kamogawa
IPC分类号： H04N5/208
CPC分类号： H04N5/208
摘要： The aperture correction circuit of the present invention comprises a preshoot signal generator which generates the preshoot signal of the edge part of a video signal, an overshoot signal generator which generates the overshoot signal of the edge part of the video signal, a shoot signal composition circuit which adds the preshoot signal and the overshoot signal at an addition ratio corresponding to a control signal, thereby to deliver the resulting signal as a correcting shoot signal, and an adder which adds the video signal and the correcting shoot signal, thereby to deliver the resulting signal as an output, wherein the shoot signal composition circuit is supplied as the control signal with a signal which changes according to the input video signal, such as the differentiated signal of the input video signal. Thus, the ratio between the preshoot signal and the overshoot signal is dynamically changed according to the input signal, so that an image quality can be adjusted according to the input video signal.
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公开(公告)号：US4782246A
公开(公告)日：1988-11-01
申请号：US62587
申请日：1987-06-16
CPC分类号： H03H11/20 , H03L7/0812
摘要： A phase shift circuit comprises a variable phase shifter responsive to an externally supplied voltage to change the amount of phase shift, and a phase detector operative to detect a phase difference between input and output signals of the variable phase shifter and supply a voltage complying with the phase difference to the variable phase shifter. When the center frequency of the variable phase shifter is changed by reason of production errors and temperature variations to deviate the phase shift amount from a desired value, the phase detector controls the center frequency such that the phase shift amount can be fixed to the desirably predetermined value.
摘要翻译： 相移电路包括响应外部提供的电压以改变相移量的可变移相器，以及相位检测器，用于检测可变移相器的输入和输出信号之间的相位差，并提供符合 相位差到可变移相器。 当可变移相器的中心频率由于生产误差和温度变化而改变时，相位偏移量偏离期望值，相位检测器控制中心频率，使得相移量可以固定到期望的预定值 值。
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