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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. 发明授权

US3517268A Phase demodulation system with two phase locked loops 失效
标题翻译：具有两相相位锁定的相位解调系统
公开(公告)号：US3517268A
公开(公告)日：1970-06-23
申请号：US3517268D
申请日：1965-09-10
申请人： NASA , WEBB JAMES E
发明人： HUDSPETH THOMAS
IPC分类号： H03D3/24 , H03F3/06
CPC分类号： H03D3/242

3. 发明授权

US09621119B2 Power amplifier bias signal multiplexing 有权
公开(公告)号：US09621119B2
公开(公告)日：2017-04-11
申请号：US15018145
申请日：2016-02-08
申请人： SKYWORKS SOLUTIONS, INC.
发明人： Philip John Lehtola
IPC分类号： H03F3/06 , H03F3/21 , H03F3/19 , H03F1/02 , H03F3/24 , H03F3/72
CPC分类号： H03F3/211 , H03F1/0261 , H03F3/19 , H03F3/195 , H03F3/245 , H03F3/72 , H03F2200/111 , H03F2200/451 , H03F2200/555 , H03F2203/21109 , H03F2203/7209
摘要： A power amplifier (PA) system includes an amplifying transistor having a base, a collector, and an emitter. The PA system further includes a radio-frequency (RF) input configured to receive an RF input signal having an RF component and a DC bias component, a bias circuit coupled to the base of the amplifying transistor, and a bias tee circuit configured to receive the RF input signal and pass at least a portion of the DC component to the bias circuit and at least a portion of the RF component to the base of the amplifying transistor.

4. 发明申请

US20100214024A1 LOW DISSIPATION AMPLIFIER 有权
标题翻译：低功耗放大器
公开(公告)号：US20100214024A1
公开(公告)日：2010-08-26
申请号：US12713015
申请日：2010-02-25
申请人： Owen Jones , Lawrence R. Fincham
发明人： Owen Jones , Lawrence R. Fincham
IPC分类号： H03F3/06
CPC分类号： H03F3/211 , H03F1/0205 , H03F1/3217 , H03F1/34 , H03F1/52 , H03F3/187 , H03F3/21 , H03F3/3069 , H03F3/3076 , H03F3/45475 , H03F2200/129 , H03F2200/135 , H03F2200/144 , H03F2200/405 , H03F2200/408 , H03F2200/411 , H03F2200/426 , H03F2200/451 , H03F2200/462 , H03F2200/481 , H03F2200/504 , H03F2203/30031 , H03F2203/30033 , H03F2203/45512 , H03F2203/45526 , H03F2203/45528
摘要： A low dissipation, low distortion amplifier includes a driver amplifier stage and a main output stage, with a plurality of impedance networks providing, among other things, feedback paths from outputs of the driver and main output stages to the input of the driver stage. The impedance networks also provide coupling paths from the outputs of the driver and main output stages to the load. The impedance networks can all be formed of resistors, capacitors, or network combinations thereof. An additional feedback path can be added from the load to the driver stage to flatten out the frequency response at low frequencies. The driver and main output stages may be operated in Class AB and B modes respectively, and/or in Class G or H modes. An intermediate amplifier driver stage may be added between the driver and main output stages.
摘要翻译：低耗散低失真放大器包括驱动器放大器级和主输出级，多个阻抗网络尤其提供从驱动器和主输出级的输出到驱动器级的输入的反馈路径。阻抗网络还提供从驱动器和主输出级的输出到负载的耦合路径。阻抗网络都可以由电阻器，电容器或其网络组合形成。可以从负载向驱动器级添加额外的反馈路径，以在低频率下平坦化频率响应。驱动器和主输出级可以分别在AB类和B模式中和/或在G或H类模式下操作。可以在驱动器和主输出级之间添加中间放大器驱动器级。

5. 发明授权

US07772537B2 Linear distributed pixel differential amplifier having mirrored inputs 有权
标题翻译：具有镜像输入的线性分布式像素差分放大器
公开(公告)号：US07772537B2
公开(公告)日：2010-08-10
申请号：US12433225
申请日：2009-04-30
申请人： Christian Boemler
发明人： Christian Boemler
IPC分类号： H03F3/06 , H03F3/45
CPC分类号： H04N5/3745
摘要： A pixel circuit that partially incorporates an associated column amplifier into the pixel circuitry. By incorporating part of a mirrored amplifier into the pixel, noise from the pixel is reduced.
摘要翻译：像素电路，其将相关联的列放大器部分地并入到像素电路中。通过将一部分镜像放大器并入到像素中，来自像素的噪声减小。

6. 发明授权

US4616188A Hall effect isolation amplifier 失效
标题翻译：霍尔效应隔离放大器
公开(公告)号：US4616188A
公开(公告)日：1986-10-07
申请号：US746860
申请日：1985-06-20
申请人： Robert M. Stitt , Rodney T. Burt
发明人： Robert M. Stitt , Rodney T. Burt
IPC分类号： H03F3/06 , H03F3/34 , H03F15/00 , G01R33/00
CPC分类号： H03F15/00
摘要： An isolation amplifier circuit is described that utilizes a magnetic field in combination with a Hall effect device to isolate input signals and output signals. The input signal is applied to a conducting coil that produces a magnetic field in a Hall effect material through which current is flowing. Because of the Hall effect, terminals on the sides of the Hall effect material can provide a voltage difference. This voltage difference is amplified and applied to a second conducting coil. The second conducting coil is adapted to provide a magnetic field in the opposite direction from the magnetic field produced by the input signal. When the magnetic fields are identical, no difference in current flowing through the two terminals will be present. The output signal of the difference amplifier circuit will be a function of the input signal. According to a second embodiment, apparatus is included for cancelling ambient magnetic fields. A second isolation amplifier circuit is arranged to have a spatial orientation rotated 180.degree. from a first isolation amplifier. With this configuration, ambient magnetic fields will have cancelling effects. The Hall effect device can be implemented in a PNP transistor with a split collector. The isolation amplifier can be fabricated with monolithic technology.
摘要翻译：描述了利用与霍尔效应装置组合的磁场来隔离输入信号和输出信号的隔离放大器电路。输入信号被施加到在电流流过的霍尔效应材料中产生磁场的导电线圈。由于霍尔效应，霍尔效应材料侧面的端子可以提供电压差。该电压差被放大并施加到第二导电线圈。第二导线线圈适于在与由输入信号产生的磁场相反的方向上提供磁场。当磁场相同时，不存在流过两个端子的电流的差异。差分放大器电路的输出信号将是输入信号的函数。根据第二实施例，包括用于消除环境磁场的装置。第二隔离放大器电路布置成具有从第一隔离放大器旋转180°的空间取向。通过这种配置，环境磁场将具有消除效果。霍尔效应器件可以在具有分离集电极的PNP晶体管中实现。隔离放大器可以用单片技术制造。

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