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109 条记录 (耗时 0.025 秒)

    Display driver circuit
    2.
    发明授权
    Display driver circuit 有权
    显示驱动电路

    公开(公告)号：US08514164B2

    公开(公告)日：2013-08-20

    申请号：US13046173

    申请日：2011-03-11

    申请人： Kazuyoshi Nishi ,  Junji Takiguchi ,  Tetsuo Asada ,  Osamu Sarai

    发明人： Kazuyoshi Nishi ,  Junji Takiguchi ,  Tetsuo Asada ,  Osamu Sarai

    IPC分类号： G09G3/36

    CPC分类号： G09G3/20 ,  G09G3/3688 ,  G09G2310/0275 ,  G09G2320/0252 ,  G09G2330/021 ,  G09G2330/06 ,  H03F3/3001 ,  H03F3/4521 ,  H03F2203/30099 ,  H03F2203/30132 ,  H03F2203/45618 ,  H03F2203/45726

    摘要： In an output mode, an output switch (SW11) is turned on and supply switches (SW13a, SW13b) are turned off, and output current is supplied to an intermediate node (nc) from driving transistors (T105a, T105b). In a transition mode, the output switch (SW11) is turned off and the supply switches (SW13a, SW13b) are turned on, and supply of the output current from the driving transistors (T105a, T105b) is shut off. Meanwhile, capacitance elements (C103a, C103b) receive voltage from reference nodes (Vcc, Vss). Also input voltage (Vin) is supplied to the intermediate node (nc).

    摘要翻译： 在输出模式中，输出开关（SW11）导通，电源开关（SW13a，SW13b）截止，输出电流从驱动晶体管（T105a，T105b）提供给中间节点（nc）。 在转换模式中，输出开关（SW11）截止，供电开关（SW13a，SW13b）导通，并且切断来自驱动晶体管（T105a，T105b）的输出电流供给。 同时，电容元件（C103a，C103b）从参考节点（Vcc，Vss）接收电压。 输入电压（Vin）也被提供给中间节点（nc）。

    Low Distortion Variable Gain Amplifier (VGA)
    3.
    发明申请
    Low Distortion Variable Gain Amplifier (VGA) 有权
    低失真可变增益放大器（VGA）

    公开(公告)号：US20120126889A1

    公开(公告)日：2012-05-24

    申请号：US13291782

    申请日：2011-11-08

    申请人： Steve Fang ,  Qiang Tang ,  Myung Jae Yoo

    发明人： Steve Fang ,  Qiang Tang ,  Myung Jae Yoo

    IPC分类号： H03F1/34 ,  H03F1/56

    CPC分类号： H03F3/45071 ,  H03F1/303 ,  H03F1/3211 ,  H03F3/45475 ,  H03F2200/234 ,  H03F2203/45116 ,  H03F2203/45588 ,  H03F2203/45591 ,  H03F2203/45594 ,  H03F2203/45616 ,  H03F2203/45618 ,  H03G1/0023 ,  H03G3/004

    摘要： In one embodiment, an apparatus an amplifier configured to receive an asymmetric signal. A first resistance is coupled between an input node and an output node of the amplifier, the input node receiving the asymmetric signal. A second resistance is coupled to the input node of the amplifier. The second resistance includes a linear resistor. A third resistance is coupled to the second resistance. The third resistance is varied to adjust an amount of asymmetric correction provided by the amplifier to correct the asymmetric signal at the output node. The amount of asymmetric correction is a function of the first resistance and a combination of the second resistance and the third resistance.

    摘要翻译： 在一个实施例中，一种被配置为接收不对称信号的放大器的装置。 第一电阻耦合在放大器的输入节点和输出节点之间，输入节点接收不对称信号。 第二电阻耦合到放大器的输入节点。 第二个电阻包括一个线性电阻。 第三电阻耦合到第二电阻。 改变第三电阻以调整由放大器提供的非对称校正量，以校正输出节点处的不对称信号。 非对称校正的量是第一电阻和第二电阻和第三电阻的组合的函数。

    CIRCUIT FOR THERMAL PROTECTION IN AUDIO POWER AMPLIFIER AND METHOD THEREOF
    5.
    发明申请
    CIRCUIT FOR THERMAL PROTECTION IN AUDIO POWER AMPLIFIER AND METHOD THEREOF 失效
    音频功率放大器中的热保护电路及其方法

    公开(公告)号：US20120086508A1

    公开(公告)日：2012-04-12

    申请号：US13229204

    申请日：2011-09-09

    申请人： Kung-Wang LEE ,  Tung-Tsai LIAO

    发明人： Kung-Wang LEE ,  Tung-Tsai LIAO

    IPC分类号： H03G3/30 ,  H03F3/45

    CPC分类号： H03F3/187 ,  H03F1/301 ,  H03F3/45183 ,  H03F2200/03 ,  H03F2200/408 ,  H03F2200/411 ,  H03F2200/447 ,  H03F2200/468 ,  H03F2203/45528 ,  H03F2203/45534 ,  H03F2203/45536 ,  H03F2203/45594 ,  H03F2203/45616 ,  H03F2203/45618 ,  H03G3/3005 ,  H03G3/3026

    摘要： The present invention relates to audio amplifier and a method for protecting the audio amplifier. The audio amplifier includes a pre-amp circuit, an output stage power amplifier, a temperature detector and a gain adjusting circuit. The pre-amp circuit receives an audio signal for amplifying the audio signal to generate an amplified audio signal. The output stage power amplifier receives the amplified audio signal to drive a load. The temperature detector is used for detecting a temperature of the output stage power amplifier to output a temperature signal. The gain adjusting circuit adjusts amplitude of the amplified audio signal of the pre-amp circuit according to the temperature signal.

    摘要翻译： 本发明涉及音频放大器和保护音频放大器的方法。 音频放大器包括前置放大器电路，输出级功率放大器，温度检测器和增益调整电路。 前置放大器电路接收用于放大音频信号的音频信号以产生放大的音频信号。 输出级功率放大器接收放大的音频信号以驱动负载。 温度检测器用于检测输出级功率放大器的温度以输出温度信号。 增益调整电路根据温度信号调整放大前电路的放大音频信号的幅度。

    GAIN CIRCUIT
    7.
    发明申请
    GAIN CIRCUIT 有权
    增益电路

    公开(公告)号：US20110140945A1

    公开(公告)日：2011-06-16

    申请号：US12636249

    申请日：2009-12-11

    申请人： Rolf SUNDBLAD

    发明人： Rolf SUNDBLAD

    IPC分类号： H03M1/12 ,  H03F3/45

    CPC分类号： H03F3/45475 ,  H03F3/45928 ,  H03F2203/45512 ,  H03F2203/45526 ,  H03F2203/45528 ,  H03F2203/45534 ,  H03F2203/45544 ,  H03F2203/45546 ,  H03F2203/45594 ,  H03F2203/45618

    摘要： A gain circuit comprises a main amplification unit and a first refresh unit. The main amplification unit comprises an amplifier, a first capacitor connected between a first input terminal of the gain circuit and a first input terminal of the amplifier, and a second capacitor connected between the first input terminal of the amplifier and a first output terminal of the amplifier. The first refresh unit comprises a first capacitor connected with a first terminal of the first capacitor to a common node of the first refresh unit , and a second capacitor connected with a first terminal of the second capacitor to the common node of the first refresh unit. The common node of the first refresh circuit is arranged to be supplied with a reference voltage (Vref, Vcm, ref) during a first phase of a refresh interval and connected to the first input terminal of the amplifier during a second phase of the refresh interval. Furthermore, a second terminal of the first capacitor of the first refresh unit is arranged to be supplied with an input voltage (Vcm, in) of the gain circuit during the first phase of the refresh interval and connected to the first input terminal of the gain circuit during the second phase of the refresh interval. Moreover, a second terminal of the second capacitor of the first refresh unit is arranged to be supplied with a first voltage, which is an output voltage (Vcm, out) or output reference voltage of the amplifier, during the first phase of the refresh interval and connected to the first output terminal of the amplifier during the second phase of the refresh interval.

    摘要翻译： 增益电路包括主放大单元和第一刷新单元。 主放大单元包括放大器，连接在增益电路的第一输入端和放大器的第一输入端之间的第一电容器和连接在放大器的第一输入端和第二输出端之间的第二电容器， 放大器 第一刷新单元包括与第一电容器的第一端子连接到第一刷新单元的公共节点的第一电容器和与第二电容器的第一端子连接到第一刷新单元的公共节点的第二电容器。 第一刷新电路的公共节点布置成在刷新间隔的第一阶段期间被提供参考电压（Vref，Vcm，ref），并且在刷新间隔的第二阶段期间连接到放大器的第一输入端 。 此外，第一刷新单元的第一电容器的第二端子布置成在刷新间隔的第一阶段期间被提供有增益电路的输入电压（Vcm，in），并连接到增益的第一输入端 电路在刷新间隔的第二阶段。 此外，第一刷新单元的第二电容器的第二端子被布置成在刷新间隔的第一阶段期间被提供作为放大器的输出电压（Vcm，out）或输出参考电压的第一电压 并且在刷新间隔的第二阶段期间连接到放大器的第一输出端。

    Photoreceiver/amplifier circuit, optical pickup device, and optical disk device
    8.
    发明授权
    Photoreceiver/amplifier circuit, optical pickup device, and optical disk device 有权
    光接收器/放大器电路，光学拾取装置和光盘装置

    公开(公告)号：US07868702B2

    公开(公告)日：2011-01-11

    申请号：US11861819

    申请日：2007-09-26

    申请人： Masaya Ohnishi

    发明人： Masaya Ohnishi

    IPC分类号： H03F3/08

    CPC分类号： H03F3/087 ,  H03F1/26 ,  H03F3/45085 ,  H03F3/45475 ,  H03F3/456 ,  H03F3/45973 ,  H03F2203/45212 ,  H03F2203/45528 ,  H03F2203/45536 ,  H03F2203/45618

    摘要： The subject invention provides a photoreceiver/amplifier circuit comprising a differential circuit including a differential transistor pair and a bias circuit; an active load; a feedback resistor for converting a photocurrent generated from a photodiode into a voltage; a reference resistor; and a compensation circuit. The resistance of the feedback resistor is greater than the resistance of the reference resistor. The compensation circuit supplies a compensation current from a junction between the feedback resistor and a non-inverting input terminal of the differential amplifier circuit, so as to cancel the difference between a voltage between terminals of the feedback resistor and a voltage between terminals of the reference resistor. This reduces noise and improves offset voltage characteristics. The present invention provides a photoreceiver/amplifier circuit ensuring noise reduction and desirable offset voltage characteristics.

    摘要翻译： 本发明提供一种光接收器/放大器电路，其包括包括差分晶体管对和偏置电路的差分电路; 有功负载; 用于将从光电二极管产生的光电转换成电压的反馈电阻器; 参考电阻; 和补偿电路。 反馈电阻的电阻大于参考电阻的电阻。 补偿电路从反馈电阻和差分放大器电路的非反相输入端之间的接点提供补偿电流，以消除反馈电阻的端子之间的电压与参考电压的端子之间的电压之间的差值 电阻。 这降低了噪声并改善了失调电压特性。 本发明提供一种确保噪声降低和期望的失调电压特性的光接收器/放大器电路。

    Operational amplifier, driver and display
    9.
    发明申请
    Operational amplifier, driver and display 有权
    运算放大器，驱动器和显示器

    公开(公告)号：US20100265273A1

    公开(公告)日：2010-10-21

    申请号：US12662457

    申请日：2010-04-19

    申请人： Kouichi Nishimura

    发明人： Kouichi Nishimura

    IPC分类号： G09G5/10 ,  H03F3/45

    CPC分类号： H03F3/45192 ,  G09G3/3614 ,  G09G3/3688 ,  G09G2310/0291 ,  G09G2330/021 ,  H03F3/3028 ,  H03F2203/45562 ,  H03F2203/45614 ,  H03F2203/45616 ,  H03F2203/45618 ,  H03F2203/45644 ,  H03F2203/45724 ,  H03F2203/45728

    摘要： An operational amplifier includes an input differential stage having one external input receiving an external input voltage and two outputs; and two output stages. A switch section is provided between inputs of the two output stages and the two outputs of the input differential stage, and is configured to alternately connect the two outputs of the input differential stage and inputs of a positive-only output stage of the two output stages; and the two outputs of the input differential stage and inputs of a negative-only output stage of the two output stages.

    摘要翻译： 运算放大器包括输入差分级，其具有接收外部输入电压和两个输出的一个外部输入; 和两个输出级。 在两个输出级的输入端和输入差分级的两个输出端之间提供开关部分，并且被配置为交替地连接输入差分级的两个输出和两个输出级的仅正输出级的输入 ; 输入差分级的两个输出和两个输出级的仅负输出级的输入。

    Electronic circuit
    10.
    发明授权
    Electronic circuit 失效
    电子电路

    公开(公告)号：US07755434B2

    公开(公告)日：2010-07-13

    申请号：US12167579

    申请日：2008-07-03

    申请人： Hiroshi Hara ,  Sosaku Sawada

    发明人： Hiroshi Hara ,  Sosaku Sawada

    IPC分类号： H03F3/08

    CPC分类号： H03F3/45475 ,  H03F1/08 ,  H03F3/087 ,  H03F2203/45138 ,  H03F2203/45618

    摘要： An electronic circuit includes a differential amplifier circuit, a first smoothing circuit, a second smoothing circuit and a first switch. The differential amplifier circuit receives a digital input signal and a reference signal. The first smoothing circuit smoothes the digital input signal with a first capacitance value. The second smoothing circuit smoothes the digital input signal with a second capacitance value larger than the first capacitance value. The first switch selects one of output signals from the first smoothing circuit and the second smoothing circuit as the reference signal.

    摘要翻译： 电子电路包括差分放大器电路，第一平滑电路，第二平滑电路和第一开关。 差分放大器电路接收数字输入信号和参考信号。 第一平滑电路以第一电容值平滑数字输入信号。 第二平滑电路以大于第一电容值的第二电容值平滑数字输入信号。 第一开关选择来自第一平滑电路和第二平滑电路的输出信号之一作为参考信号。