利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

111 条记录 (耗时 0.023 秒)

    Noise filter and noise-filter-incorporated amplifier circuit
    3.
    发明授权
    Noise filter and noise-filter-incorporated amplifier circuit 有权
    噪声滤波器和噪声滤波器内置的放大器电路

    公开(公告)号：US08134423B2

    公开(公告)日：2012-03-13

    申请号：US12401317

    申请日：2009-03-10

    申请人： Eio Onodera

    发明人： Eio Onodera

    IPC分类号： H03H7/06

    CPC分类号： H03H7/0107 ,  H03F3/187 ,  H03F2200/03 ,  H03F2200/114 ,  H03F2200/171 ,  H03F2200/372

    摘要： A ladder LPF includes a first capacitor formed of a transistor in which two terminals out of three are diode-connected, and a second capacitor formed by connecting a pn junction capacitor and an insulating capacitor in parallel. In the second capacitor, the pn junction capacitor formed in a semiconductor layer and the insulating capacitor formed in a surface of the semiconductor layer are connected to each other in parallel so as to almost overlap each other. Accordingly, the area in the LPF occupied by the second capacitor can be prevented from increasing even when its capacitance value is increased. Moreover, having the snap-back characteristics, the first capacitor can protect the second capacitor having the insulating capacitor from ESD. As a result, what can be obtained is a compact noise filter having high RFI removal characteristics and accomplishing high resistance to ESD.

    摘要翻译： 梯形LPF包括由三极中的两个端子二极管连接的晶体管形成的第一电容器和通过并联连接pn结电容器和绝缘电容器而形成的第二电容器。 在第二电容器中，形成在半导体层中的pn结电容器和形成在半导体层的表面中的绝缘电容器彼此并联连接，从而几乎彼此重叠。 因此，即使其电容值增加，也可以防止由第二电容器占用的LPF中的面积增加。 此外，具有卡扣特性，第一电容器可以保护具有绝缘电容器的第二电容器与ESD。 结果，可以获得具有高RFI去除特性并且实现高耐ESD性的紧凑型噪声滤波器。

    High efficiency amplifier with reduced electromagnetic interference
    4.
    发明申请
    High efficiency amplifier with reduced electromagnetic interference 失效
    具有降低电磁干扰的高效放大器

    公开(公告)号：US20120008240A1

    公开(公告)日：2012-01-12

    申请号：US12803869

    申请日：2010-07-07

    申请人： Xicheng Jiang ,  Jianlong Chen

    发明人： Xicheng Jiang ,  Jianlong Chen

    IPC分类号： H02H9/00

    CPC分类号： H03F3/2173 ,  H03F2200/114 ,  H03F2200/498 ,  H03K17/163

    摘要： Disclosed is a high efficiency amplifier operable to substantially reduce electromagnetic interference (EMI). The high efficiency amplifier comprises an output stage to provide a high powered signal to a load. The high efficiency amplifier further comprises an overlap protection circuit to produce a timing non-overlap in a control signal for the output stage, and an edge control circuit to reduce a transient portion of the high powered signal to substantially reduce the EMI. The overlap protection circuit and the edge control circuit may be implemented with resistive source degeneration. Also disclosed is a related method. In one embodiment, the high efficiency amplifier and the related method may be incorporated into a cellular telephone or a mobile audio device.

    摘要翻译： 公开了一种高效率放大器，可操作以显着降低电磁干扰（EMI）。 高效率放大器包括用于向负载提供高功率信号的输出级。 高效率放大器还包括重叠保护电路，用于在用于输出级的控制信号中产生定时不重叠，以及边缘控制电路，以减少高功率信号的瞬态部分，以显着降低EMI。 重叠保护电路和边缘控制电路可以用电阻源退化来实现。 还公开了相关方法。 在一个实施例中，高效率放大器和相关方法可以被并入到蜂窝电话或移动音频设备中。

    Class-D amplifier and method therefor
    5.
    发明授权
    Class-D amplifier and method therefor 有权
    D类放大器及其方法

    公开(公告)号：US07852155B2

    公开(公告)日：2010-12-14

    申请号：US11572431

    申请日：2006-03-03

    申请人： Hassan Chaoui

    发明人： Hassan Chaoui

    IPC分类号： H03F3/217

    CPC分类号： H03F3/2173 ,  H03F1/52 ,  H03F3/217 ,  H03F3/2178 ,  H03F3/423 ,  H03F3/72 ,  H03F2200/114 ,  H03F2203/7221 ,  H03F2203/7239

    摘要： In one embodiment, a class-D amplifier (11) is configured to form first (DP) and second (DN) PWM signals each having a duty cycle that is proportional to a received analog input signal (12) and responsively to enable a switch (31, 32) to short the outputs (13, 14) of the class-D amplifier (11) together responsively to some states of the first (DP) and second (DN) PWM signals.

    摘要翻译： 在一个实施例中，D类放大器（11）被配置为形成第一（DP）和第二（DN）PWM信号，每个信号具有与所接收的模拟输入信号（12）成比例的占空比，并且响应地启用开关 （31,32），以将所述D类放大器（11）的输出（13,14）一起响应于所述第一（DP）和第二（DN）PWM信号的某些状态而一起短路。

    Power amplifier
    6.
    发明授权
    Power amplifier 有权
    功率放大器

    公开(公告)号：US07782135B2

    公开(公告)日：2010-08-24

    申请号：US12446965

    申请日：2007-10-18

    申请人： Marco Berkhout

    发明人： Marco Berkhout

    IPC分类号： H03F3/217

    CPC分类号： H03F3/2178 ,  H03F1/523 ,  H03F3/2171 ,  H03F2200/114 ,  H03F2200/351 ,  H03F2200/453 ,  H03F2200/456 ,  H03F2200/462 ,  H03F2200/471 ,  H03F2200/78 ,  H03K5/1515 ,  H03K17/164 ,  H03K17/6871

    摘要： A driver (Highside Driver, Lowside Driver) adapted to drive each of final transistors (MH, ML, Mpower) included in a power amplifier, the driver including: a first plurality of switches (Mpsiow, Mpmoderate, Mpfast) having their respective main current channels coupled between a bias voltage terminal (Vddx) and a control electrode of the respective final transistors (MH, ML, Mpower), said first plurality of switches (Mpsiow, Mpmoderate, Mpfast) being selectively turned ON for enabling a progressive charging of the respective control electrode of the final transistors (MH, ML, MPower), a second plurality of switches (Mnsiow, Mnfast) having their respective main current channels coupled between another bias voltage terminal (Vsource) and the control electrode of the respective final transistors (MH, ML, Mpower), said second plurality of switches (Mnsiow, Mnfast) being selectively switched ON until a current through the respective final transistors (MH, ML, Mpower) changes its polarity.

    摘要翻译： 适用于驱动包括在功率放大器中的每个最终晶体管（MH，ML，Mpower）的驱动器（Highside Driver，Lowside Driver），所述驱动器包括：具有各自主电流的第一多个开关（Mpsiow，Mpmoderate，Mpfast） 耦合在偏置电压端子（Vddx）和各个最终晶体管（MH，ML，Mpower）的控制电极之间的通道，所述第一多个开关（Mpsiow，Mpmoderate，Mpfast）被选择性地接通，以使得能够对 最终晶体管（MH，ML，MPower）的相应控制电极，其各自的主电流通道的第二多个开关（Mnsiow，Mnfast）耦合在另一个偏置电压端子（Vsource）和各个最终晶体管的控制电极 MH，ML，Mpower），所述第二多个开关（Mnsiow，Mnfast）被选择性地导通，直到通过各个最终晶体管（MH，ML，Mpower）的电流改变其极性。

    POWER CONVERSION REGULATOR WITH PREDICTIVE ENERGY BALANCING
    7.
    发明申请
    POWER CONVERSION REGULATOR WITH PREDICTIVE ENERGY BALANCING 有权
    具有预测能量平衡的功率转换调节器

    公开(公告)号：US20100066335A1

    公开(公告)日：2010-03-18

    申请号：US12621664

    申请日：2009-11-19

    申请人： William H. Morong ,  Thomas E. Lawson

    发明人： William H. Morong ,  Thomas E. Lawson

    IPC分类号： G05F1/00 ,  H02M7/5383

    CPC分类号： H03F3/45475 ,  G05F1/46 ,  H02M3/156 ,  H02M3/157 ,  H03F1/083 ,  H03F1/14 ,  H03F1/26 ,  H03F1/342 ,  H03F3/50 ,  H03F2200/114 ,  H03F2200/153 ,  H03F2200/459 ,  H03F2200/534

    摘要： A power-conversion regulator comprising an inductive reactor, an output filter reactor, and a switch for admitting energy to the inductive reactor, additionally comprises computation circuitry responsive to the flux in the inductive reactor, to a reference signal, to an output voltage, and sometimes to an output load current, for computing the quantity of energy that must be supplied to a load and to the output filter reactor to regulate the output voltage or current to a desired relationship with the reference signal during each chopping waveform cycle driving the switch. As the inductive reactor is charged from an input energy source, the computation circuitry predicts whether the energy in the inductive reactor has become adequate for the regulation.

    摘要翻译： 一种电力转换调节器，包括感应电抗器，输出滤波电抗器和用于将电能馈入感应电抗器的开关，还包括响应感应电抗器中的通量，参考信号和输出电压的计算电路，以及 有时到输出负载电流，用于计算在驱动开关的每个斩波波形周期期间必须提供给负载和输出滤波电抗器的能量的量，以将输出电压或电流调节到与参考信号的期望关系。 当感应电抗器从输入能源充电时，计算电路预测感应电抗器中的能量是否已经足够用于调节。

    Frequency output circuit
    8.
    发明授权
    Frequency output circuit 有权
    频率输出电路

    公开(公告)号：US07675351B2

    公开(公告)日：2010-03-09

    申请号：US11107905

    申请日：2005-04-18

    申请人： Ryo Ando

    发明人： Ryo Ando

    IPC分类号： G05F1/10

    CPC分类号： H03F3/45085 ,  G01F15/00 ,  G01F15/068 ,  H03F2200/114 ,  H03F2203/45674 ,  H03F2203/45686

    摘要： Unwanted electromagnetic waves are eliminated in a frequency output circuit comprising an open-collector output terminal whereby radio noise can be reduced. A frequency output circuit 10 comprises an open-collector transistor Q4 with an open-collector output terminal connected to a pull-up resistor Rf connected to an external power supply Vex. A current limiting circuit 16 limits a current through the output terminal such that a high potential and a low potential of the output waveform of a frequency signal outputted by an output circuit 12 are smoothly switched. The current limiting circuit 16 is formed by a differential pair circuit of transistors Q1 and Q2 each with a resistor provided in the emitter thereof, and a current mirror circuit comprising an open-collector transistor, for example.

    摘要翻译： 在包括集电极开路输出端子的频率输出电路中消除了不需要的电磁波，从而可以降低无线电噪声。 频率输出电路10包括开集电极晶体管Q4，集电极开路输出端连接到连接到外部电源Vex的上拉电阻Rf。 限流电路16限制通过输出端子的电流，使得输出电路12输出的频率信号的输出波形的高电位和低电位平滑地切换。 电流限制电路16由晶体管Q1和Q2的差分对电路形成，每个晶体管Q1和Q2均具有设置在其发射极中的电阻器，以及包括集电极晶体管的电流镜电路。

    Control circuit and method for a switching amplifier
    9.
    发明授权
    Control circuit and method for a switching amplifier 有权
    开关放大器的控制电路和方法

    公开(公告)号：US07545207B2

    公开(公告)日：2009-06-09

    申请号：US12007907

    申请日：2008-01-17

    申请人： Ming-Hung Chang ,  Fu-Yuan Chen

    发明人： Ming-Hung Chang ,  Fu-Yuan Chen

    IPC分类号： H03F3/38

    CPC分类号： H03F3/2173 ,  H03F1/0205 ,  H03F1/34 ,  H03F2200/03 ,  H03F2200/114 ,  H03F2200/301 ,  H03F2200/351 ,  H03F2200/384 ,  H03F2200/391 ,  H03K17/6871

    摘要： In a control circuit and method for a high efficiency and low EMI switching amplifier, an input signal is compared with a reference signal to generate a comparison signal, and a control signal is generated in response to the comparison signal for a driver to generate an output signal. The output signal is fed back to control the slope of the reference signal in association with an initial level set for the reference signal to provide a minimum on-time period for the output signal. Alternatively, a reference value is provided to compare with the reference signal for setting a minimum on-time period for the output signal.

    摘要翻译： 在用于高效率和低EMI开关放大器的控制电路和方法中，将输入信号与参考信号进行比较以产生比较信号，并且响应于驱动器的比较信号产生控制信号以产生输出 信号。 输出信号被反馈以与参考信号的初始电平相关联地控制参考信号的斜率，以为输出信号提供最小导通时间周期。 或者，提供参考值以与用于设置输出信号的最小导通时间周期的参考信号进行比较。

    CLASS D AMPLIFIER WITH INCREASED EFFICIENCY
    10.
    发明申请
    CLASS D AMPLIFIER WITH INCREASED EFFICIENCY 有权
    具有提高效率的D类放大器

    公开(公告)号：US20090033419A1

    公开(公告)日：2009-02-05

    申请号：US11831941

    申请日：2007-07-31

    申请人： Lance Weston ,  Tony T. Li ,  John J. Ryan

    发明人： Lance Weston ,  Tony T. Li ,  John J. Ryan

    IPC分类号： H03F3/217 ,  H03F3/38

    CPC分类号： H03F3/2173 ,  H03F1/0205 ,  H03F2200/03 ,  H03F2200/114 ,  H03F2200/321 ,  H03F2200/351

    摘要： The present invention is a method of operating a speaker by converting an audio signal to a pulse-width modulated signal that has a plurality of positive pulses and a plurality of negative pulses as a function of the audio signal, then driving an H-bridge circuit interconnected to a speaker, wherein the H-bridge circuit comprises an A-side and a B-side, wherein the A-side comprises a first switching transistor and a second switching transistor, and wherein the B-side comprises a first switching transistor and a second switching transistor. For each positive pulse, the A-side of the H-bridge circuit is driven by pushing the first switching transistor of the A-side while grounding the second switching transistor of the A-side. For each negative pulse, the B-side of the H-bridge circuit is driven by pushing the first switching transistor of the B-side while grounding the second switching transistor of the B-side.

    摘要翻译： 本发明是一种通过将音频信号转换成具有作为音频信号的函数的多个正脉冲和多个负脉冲的脉冲宽度调制信号来操作扬声器的方法，然后驱动H桥电路 互连到扬声器，其中所述H桥电路包括A侧和B侧，其中所述A侧包括第一开关晶体管和第二开关晶体管，并且其中所述B侧包括第一开关晶体管和 第二开关晶体管。 对于每个正脉冲，通过在A侧的第二开关晶体管接地的同时推动A侧的第一开关晶体管来驱动H桥电路的A侧。 对于每个负脉冲，通过在B侧的第二开关晶体管接地的同时推动B侧的第一开关晶体管来驱动H桥电路的B侧。