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1. 发明授权

US07476839B2 Amplifier circuit for optical disk drive 有权
标题翻译：用于光盘驱动器的放大器电路
公开(公告)号：US07476839B2
公开(公告)日：2009-01-13
申请号：US10983737
申请日：2004-11-09
申请人： Hiroshi Yamaguchi , Masaki Taniguchi
发明人： Hiroshi Yamaguchi , Masaki Taniguchi
IPC分类号： H03F3/06 , H03F3/45 , H03G3/00 , G11B11/00
CPC分类号： H03F3/08 , H03F3/45085 , H03F2203/45466 , H03G3/3084
摘要： An operational amplifier including a pair of differential input transistors is provided with a feedback resistor switching circuit and a variable current source. When a loaded optical disk is a DVD-ROM, the feedback resistor switching circuit reduces a gain of the operational amplifier and the variable current source selects a large current (of, for example, 1 mA) as a common bias current supplied to the differential input transistors. When the loaded optical disk is a DVD-RAM with low reflectance and low recording/reproducing speed, the feedback resistor switching circuit enhances the gain of the operational amplifier and the variable current source selects a small current (of, for example, 0.5 mA) as the common bias current.
摘要翻译：包括一对差分输入晶体管的运算放大器设置有反馈电阻器切换电路和可变电流源。当加载的光盘是DVD-ROM时，反馈电阻器开关电路降低运算放大器的增益，并且可变电流源选择大电流（例如，1mA）作为提供给差分器的公共偏置电流输入晶体管。当装载的光盘是具有低反射率和低记录/再现速度的DVD-RAM时，反馈电阻器切换电路增强了运算放大器的增益，并且可变电流源选择小电流（例如，0.5mA）作为常见的偏置电流。

2. 发明申请

US20080179501A1 Output impedance varying circuit 有权
公开(公告)号：US20080179501A1
公开(公告)日：2008-07-31
申请号：US12076788
申请日：2008-03-24
申请人： Hiroshi Yamaguchi , Masaki Taniguchi
发明人： Hiroshi Yamaguchi , Masaki Taniguchi
IPC分类号： G01J1/44
CPC分类号： H03F3/3069 , H03F1/08 , H03F1/56 , H03F3/08 , H03F3/087 , H03F3/343
摘要： A photo detector IC (PDIC) is connected with a flexible printed circuit board (FPC). A signal converted into a voltage through light-to-voltage conversion in the PDIC is connected with the drain of a field effect transistor (FET), while the source of the FET is connected to an output terminal. A signal from the output terminal is input into a signal processing board of the main body via the FPC serving as an equivalent circuit composed of a coil and a capacitor. The gate of the FET is connected with a variable voltage source. Peaking occurs due to inductor components and capacitance components of the FPC. However, by application of voltage to the variable voltage source, the gate voltage value of the FET is adjusted to be an optimal value, whereby the peaking is suppressed by the on-resistance of the FET.

3. 发明授权

US07391265B2 Amplifier unit and optical disc drive 失效
标题翻译：放大器单元和光盘驱动器
公开(公告)号：US07391265B2
公开(公告)日：2008-06-24
申请号：US11430241
申请日：2006-05-09
申请人： Shinichi Miyamoto , Yousuke Kuroiwa , Masaya Ueda , Hideo Fukuda , Hiroshi Yamaguchi , Masaki Taniguchi
发明人： Shinichi Miyamoto , Yousuke Kuroiwa , Masaya Ueda , Hideo Fukuda , Hiroshi Yamaguchi , Masaki Taniguchi
IPC分类号： H03F3/45 , H03F3/08
CPC分类号： H03F3/3432 , H03F3/08 , H03F2200/78
摘要： An amplifier unit is provided, with which the need for manufacturing a photoelectric conversion IC in Bi-CMOS process is eliminated, and relatively low process cost of the photoelectric conversion IC is achieved. The input section of a buffer (the base of a transistor Q5) is connected with a plurality of patterns of phase compensation circuits each including a resistor and a capacitor connected in series. A bipolar transistor (Q6) is interposed between a positive power supply line and a capacitor (C2) forming a capacitance of the phase compensation circuit. By switching on/off the bipolar transistor (Q6), the capacitance value and resistance value of the phase compensation circuit are switched. Since the bipolar transistor (Q6) is interposed between the capacitor (C2) and the positive power supply line, base current (Isw) acting as a switch signal does not affect the amplifier unit.
摘要翻译：提供放大器单元，消除了在Bi-CMOS工艺中制造光电转换IC的需要，并且实现了光电转换IC的相对低的处理成本。缓冲器（晶体管Q 5的基极）的输入部分与多个相位补偿电路相连，每个相位补偿电路均包括串联连接的电阻器和电容器。在正电源线和形成相位补偿电路的电容的电容器（C 2）之间插入双极晶体管（Q6）。通过接通/关断双极晶体管（Q 6），相位补偿电路的电容值和电阻值被切换。由于双极晶体管（Q 6）插在电容器（C 2）和正电源线之间，所以作为开关信号的基极电流（Isw）不影响放大器单元。

4. 发明授权

US07365302B2 Output impedance varying circuit 有权
标题翻译：输出阻抗变化电路
公开(公告)号：US07365302B2
公开(公告)日：2008-04-29
申请号：US11329029
申请日：2006-01-11
申请人： Hiroshi Yamaguchi , Masaki Taniguchi
发明人： Hiroshi Yamaguchi , Masaki Taniguchi
IPC分类号： G01J1/44
CPC分类号： H03F3/3069 , H03F1/08 , H03F1/56 , H03F3/08 , H03F3/087 , H03F3/343
摘要： A photo detector IC (PDIC) is connected with a flexible printed circuit board (FPC). A signal converted into a voltage through light-to-voltage conversion in the PDIC is connected with the drain of a field effect transistor (FET), while the source of the FET is connected to an output terminal. A signal from the output terminal is input into a signal processing board of the main body via the FPC serving as an equivalent circuit composed of a coil and a capacitor. The gate of the FET is connected with a variable voltage source. Peaking occurs due to inductor components and capacitance components of the FPC. However, by application of voltage to the variable voltage source, the gate voltage value of the FET is adjusted to be an optimal value, whereby the peaking is suppressed by the on-resistance of the FET.
摘要翻译：光电检测器IC（PDIC）与柔性印刷电路板（FPC）连接。在PDIC中通过光电压转换成电压的信号与场效应晶体管（FET）的漏极连接，而FET的源极连接到输出端子。来自输出端子的信号经由作为由线圈和电容器组成的等效电路的FPC输入到主体的信号处理板。 FET的栅极与可变电压源连接。由于FPC的电感器元件和电容元件引起峰化。然而，通过向可变电压源施加电压，将FET的栅极电压值调整为最佳值，由此通过FET的导通电阻来抑制峰值。

5. 发明授权

US06818879B2 Amplifier circuit for optical disk drive 有权
标题翻译：用于光盘驱动器的放大器电路
公开(公告)号：US06818879B2
公开(公告)日：2004-11-16
申请号：US10183367
申请日：2002-06-28
申请人： Hiroshi Yamaguchi , Masaki Taniguchi
发明人： Hiroshi Yamaguchi , Masaki Taniguchi
IPC分类号： H03F308
CPC分类号： H03F3/08 , H03F3/45085 , H03F2203/45466 , H03G3/3084
摘要： An operational amplifier including a pair of differential input transistors is provided with a feedback resistor switching circuit and a variable current source. When a loaded optical disk is a DVD-ROM, the feedback resistor switching circuit reduces a gain of the operational amplifier and the variable current source selects a large current (of, for example, 1 mA) as a common bias current supplied to the differential input transistors. When the loaded optical disk is a DVD-RAM with low reflectance and low recording/reproducing speed, the feedback resistor switching circuit enhances the gain of the operational amplifier and the variable current source selects a small current (of, for example, 0.5 mA) as the common bias current.
摘要翻译：包括一对差分输入晶体管的运算放大器设置有反馈电阻器切换电路和可变电流源。当加载的光盘是DVD-ROM时，反馈电阻器开关电路降低运算放大器的增益，并且可变电流源选择大电流（例如，1mA）作为提供给差分器的公共偏置电流输入晶体管。当装载的光盘是具有低反射率和低记录/再现速度的DVD-RAM时，反馈电阻器切换电路增强了运算放大器的增益，并且可变电流源选择小电流（例如，0.5mA）作为常见的偏置电流。

6. 发明申请

US20060202761A1 Amplifier unit and optical disc drive 失效
标题翻译：放大器单元和光盘驱动器
公开(公告)号：US20060202761A1
公开(公告)日：2006-09-14
申请号：US11430241
申请日：2006-05-09
申请人： Shinichi Miyamoto , Yousuke Kuroiwa , Masaya Ueda , Hideo Fukuda , Hiroshi Yamaguchi , Masaki Taniguchi
发明人： Shinichi Miyamoto , Yousuke Kuroiwa , Masaya Ueda , Hideo Fukuda , Hiroshi Yamaguchi , Masaki Taniguchi
IPC分类号： H03F3/45
CPC分类号： H03F3/3432 , H03F3/08 , H03F2200/78
摘要： An amplifier unit is provided, with which the need for manufacturing a photoelectric conversion IC in Bi-CMOS process is eliminated, and relatively low process cost of the photoelectric conversion IC is achieved. The input section of a buffer (the base of a transistor Q5) is connected with a plurality of patterns of phase compensation circuits each including a resistor and a capacitor connected in series. A bipolar transistor (Q6) is interposed between a positive power supply line and a capacitor (C2) forming a capacitance of the phase compensation circuit. By switching on/off the bipolar transistor (Q6), the capacitance value and resistance value of the phase compensation circuit are switched. Since the bipolar transistor (Q6) is interposed between the capacitor (C2) and the positive power supply line, base current (Isw) acting as a switch signal does not affect the amplifier unit.
摘要翻译：提供放大器单元，消除了在Bi-CMOS工艺中制造光电转换IC的需要，并且实现了光电转换IC的相对低的处理成本。缓冲器（晶体管Q 5的基极）的输入部分与多个相位补偿电路相连，每个相位补偿电路均包括串联连接的电阻器和电容器。在正电源线和形成相位补偿电路的电容的电容器（C 2）之间插入双极晶体管（Q6）。通过接通/关断双极晶体管（Q 6），相位补偿电路的电容值和电阻值被切换。由于双极晶体管（Q 6）插在电容器（C 2）和正电源线之间，所以作为开关信号的基极电流（Isw）不影响放大器单元。

7. 发明授权

US07586081B2 Output impedance varying circuit 有权
标题翻译：输出阻抗变化电路
公开(公告)号：US07586081B2
公开(公告)日：2009-09-08
申请号：US12076788
申请日：2008-03-24
申请人： Hiroshi Yamaguchi , Masaki Taniguchi
发明人： Hiroshi Yamaguchi , Masaki Taniguchi
IPC分类号： G01J1/44 , H01J40/14 , H03F3/08
CPC分类号： H03F3/3069 , H03F1/08 , H03F1/56 , H03F3/08 , H03F3/087 , H03F3/343
摘要： A photo detector IC (PDIC) is connected with a flexible printed circuit board (FPC). A signal converted into a voltage through light-to-voltage conversion in the PDIC is connected with the drain of a field effect transistor (FET), while the source of the FET is connected to an output terminal. A signal from the output terminal is input into a signal processing board of the main body via the FPC serving as an equivalent circuit composed of a coil and a capacitor. The gate of the FET is connected with a variable voltage source. Peaking occurs due to inductor components and capacitance components of the FPC. However, by application of voltage to the variable voltage source, the gate voltage value of the FET is adjusted to be an optimal value, whereby the peaking is suppressed by the on-resistance of the FET.
摘要翻译：光电检测器IC（PDIC）与柔性印刷电路板（FPC）连接。在PDIC中通过光电压转换成电压的信号与场效应晶体管（FET）的漏极连接，而FET的源极连接到输出端子。来自输出端子的信号经由作为由线圈和电容器组成的等效电路的FPC输入到主体的信号处理板。 FET的栅极与可变电压源连接。由于FPC的电感器元件和电容元件引起峰化。然而，通过向可变电压源施加电压，将FET的栅极电压值调整为最佳值，由此通过FET的导通电阻来抑制峰值。

8. 发明授权

US07545156B2 Test circuit and test method that includes supplying a current to a plurality of light-receiving elements 失效
标题翻译：包括向多个光接收元件提供电流的测试电路和测试方法
公开(公告)号：US07545156B2
公开(公告)日：2009-06-09
申请号：US11677077
申请日：2007-02-21
申请人： Yousuke Kuroiwa , Hideo Fukuda , Hiroshi Yamaguchi , Tetsuo Chato , Yuzo Shimizu , Masaki Taniguchi
发明人： Yousuke Kuroiwa , Hideo Fukuda , Hiroshi Yamaguchi , Tetsuo Chato , Yuzo Shimizu , Masaki Taniguchi
IPC分类号： G01R27/08 , G01R31/00 , H03K3/02 , G01R21/00
CPC分类号： H03F3/087 , G01R31/025 , H03F3/45475 , H03F2200/252 , H03F2203/45564
摘要： The test circuit according to the present invention includes: a plurality of light-receiving elements; a plurality of amplifiers, each of which converts, into a voltage, a photoelectric current supplied from one of the light-receiving elements; and an electric current supplying unit which supplies an electric current to each of the light-receiving elements and each of the amplifiers. In this test circuit, the electric current supplying unit selectively supplies an electric current to a first group of light-receiving elements and to a second group of light-receiving elements, the first group of light-receiving elements including light-receiving elements, out of the plurality of light-receiving elements, which are neither vertically nor horizontally adjacent to each other, and the second group of light-receiving elements including light-receiving elements, out of the plurality of light-receiving elements, which are vertically or horizontally adjacent to the light-receiving elements of the first group of light-receiving elements.
摘要翻译：根据本发明的测试电路包括：多个光接收元件; 多个放大器，每个放大器将从一个光接收元件提供的光电流转换成电压; 以及电流供应单元，其向每个光接收元件和每个放大器提供电流。在该测试电路中，电流供给单元选择性地将电流提供给第一组光接收元件和第二组光接收元件，第一组光接收元件包括光接收元件多个光接收元件彼此不垂直或水平相邻，并且包括在垂直或水平方向上的多个光接收元件中的包含光接收元件的第二组光接收元件邻近第一组光接收元件的光接收元件。

9. 发明申请

US20060231744A1 Output impedance varying circuit 有权
公开(公告)号：US20060231744A1
公开(公告)日：2006-10-19
申请号：US11329029
申请日：2006-01-11
申请人： Hiroshi Yamaguchi , Masaki Taniguchi
发明人： Hiroshi Yamaguchi , Masaki Taniguchi
IPC分类号： H01L31/00
CPC分类号： H03F3/3069 , H03F1/08 , H03F1/56 , H03F3/08 , H03F3/087 , H03F3/343
摘要： A photo detector IC (PDIC) is connected with a flexible printed circuit board (FPC). A signal converted into a voltage through light-to-voltage conversion in the PDIC is connected with the drain of a field effect transistor (FET), while the source of the FET is connected to an output terminal. A signal from the output terminal is input into a signal processing board of the main body via the FPC serving as an equivalent circuit composed of a coil and a capacitor. The gate of the FET is connected with a variable voltage source. Peaking occurs due to inductor components and capacitance components of the FPC. However, by application of voltage to the variable voltage source, the gate voltage value of the FET is adjusted to be an optimal value, whereby the peaking is suppressed by the on-resistance of the FET.

10. 发明申请

US20050063270A1 Amplifier circuit for optical desk drive 有权
标题翻译：用于光学桌面驱动器的放大器电路
公开(公告)号：US20050063270A1
公开(公告)日：2005-03-24
申请号：US10983737
申请日：2004-11-09
申请人： Hiroshi Yamaguchi , Masaki Taniguchi
发明人： Hiroshi Yamaguchi , Masaki Taniguchi
IPC分类号： G11B20/10 , G11B7/005 , H03F3/08 , H03F3/45 , H03G3/30 , G11B7/00
CPC分类号： H03F3/08 , H03F3/45085 , H03F2203/45466 , H03G3/3084
摘要： An operational amplifier including a pair of differential input transistors is provided with a feedback resistor switching circuit and a variable current source. When a loaded optical disk is a DVD-ROM, the feedback resistor switching circuit reduces a gain of the operational amplifier and the variable current source selects a large current (of, for example, 1 mA) as a common bias current supplied to the differential input transistors. When the loaded optical disk is a DVD-RAM with low reflectance and low recording/reproducing speed, the feedback resistor switching circuit enhances the gain of the operational amplifier and the variable current source selects a small current (of, for example, 0.5 mA) as the common bias current.
摘要翻译：包括一对差分输入晶体管的运算放大器设置有反馈电阻器切换电路和可变电流源。当加载的光盘是DVD-ROM时，反馈电阻器开关电路降低运算放大器的增益，并且可变电流源选择大电流（例如，1mA）作为提供给差分器的公共偏置电流输入晶体管。当装载的光盘是具有低反射率和低记录/再现速度的DVD-RAM时，反馈电阻器切换电路增强了运算放大器的增益，并且可变电流源选择小电流（例如，0.5mA）作为常见的偏置电流。

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