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222 条记录 (耗时 0.014 秒)

    AMPLIFIER CIRCUIT AND METHODS OF OPERATION THEREOF
    31.
    发明申请
    AMPLIFIER CIRCUIT AND METHODS OF OPERATION THEREOF 审中-公开
    放大器电路及其工作方式

    公开(公告)号：US20090212859A1

    公开(公告)日：2009-08-27

    申请号：US12434424

    申请日：2009-05-01

    申请人： John P. Lesso ,  John L. Pennock ,  Peter J. Frith

    发明人： John P. Lesso ,  John L. Pennock ,  Peter J. Frith

    IPC分类号： H03G3/20

    CPC分类号： H02M3/07 ,  H03F1/025 ,  H03F3/185 ,  H03F3/187 ,  H03F3/68 ,  H03F2200/507 ,  H03F2200/511 ,  H03G1/0017 ,  H03G1/0029 ,  H03G1/0088 ,  H03G1/0094

    摘要： A signal amplifying circuit and associated methods and apparatuses, the circuit comprising: a signal path extending from an input terminal to an output terminal, a gain controller arranged to control the gain applied along the signal path in response to a control signal; an output stage within the signal path for generating the output signal, the output stage having a gain that is substantially independent of its supply voltage, and a variable voltage power supply comprising a charge pump for providing positive and negative output voltages, the charge pump comprising a network of switches that is operable in a number of different states and a controller for operating the switches in a sequence of the states so as to generate positive and negative output voltages together spanning a voltage approximately equal to the input voltage.

    摘要翻译： 一种信号放大电路及相关的方法和装置，所述电路包括：从输入端延伸到输出端的信号路径;增益控制器，被配置为响应于控制信号控制沿信号路径施加的增益; 用于产生输出信号的信号路径内的输出级，输出级具有基本上与其电源电压无关的增益;以及可变电压电源，包括用于提供正和负输出电压的电荷泵，所述电荷泵包括 可操作于多个不同状态的开关网络和用于以一系列状态操作开关的控制器，以便将跨越大致等于输入电压的电压产生正和负输出电压。

    Multi-mode amplitude modulator control method
    32.
    发明授权
    Multi-mode amplitude modulator control method 有权
    多模幅度调制器控制方法

    公开(公告)号：US07538631B2

    公开(公告)日：2009-05-26

    申请号：US11707886

    申请日：2007-02-20

    申请人： Antti Immonen ,  Vlad Grigore

    发明人： Antti Immonen ,  Vlad Grigore

    IPC分类号： H03C1/00

    CPC分类号： H03F3/24 ,  H02M2001/0045 ,  H03F1/0205 ,  H03F1/0211 ,  H03F3/68 ,  H03F2200/324 ,  H03F2200/351 ,  H03F2200/432 ,  H03F2200/462 ,  H03F2200/481 ,  H03F2200/504 ,  H03F2200/507

    摘要： A power management device providing a power amplifier with power supply voltage is provided. The power management unit includes a parallel-hybrid amplitude modulator apparatus having a linear part configured to track frequency components of an input signal above a determined threshold frequency and a switching part arranged in parallel with the linear part and configured to track frequency components of the input signal below the determined threshold frequency. Additionally, the power management unit includes a current sensing and controlling part configured to determine the level of a direct current component at an output of the linear part and control the switching part to produce an output signal compensating for the direct current component at the output of the linear part to decrease the absolute level of the direct current at the output of the linear part.

    摘要翻译： 提供了提供具有电源电压的功率放大器的电源管理装置。 功率管理单元包括并联混合幅度调制器装置，其具有被配置为跟踪高于确定的阈值频率的输入信号的频率分量的线性部分和与线性部分并联布置的开关部分，并且被配置为跟踪输入的频率分量 信号低于确定的阈值频率。 另外，电力管理单元包括电流检测和控制部分，其被配置为确定线性部分的输出处的直流分量的电平，并且控制开关部分以产生补偿在输出端处的直流分量的输出信号 线性部分降低线性部分输出端的直流电平的绝对电平。

    Analog front end for a wireless device
    33.
    发明申请
    Analog front end for a wireless device 审中-公开
    模拟前端用于无线设备

    公开(公告)号：US20070270110A1

    公开(公告)日：2007-11-22

    申请号：US11437263

    申请日：2006-05-18

    申请人： Sergey Smirnov ,  Alexander Rapoport

    发明人： Sergey Smirnov ,  Alexander Rapoport

    IPC分类号： H04B1/04 ,  H01Q11/12

    CPC分类号： H04B1/04 ,  H03F1/32 ,  H03F3/211 ,  H03F3/24 ,  H03F3/602 ,  H03F3/72 ,  H03F2200/204 ,  H03F2200/451 ,  H03F2200/507 ,  H03F2203/7227 ,  H04B2001/0408

    摘要： A novel amplifier for a wireless device is disclosed. The system employing the preferred embodiment can deliver a radio signal with output power up to 500 mW for 64QAM (48 Mb/s bit rate) modulation and a radio signal up to 700 mW for 16QAM (36 Mb/s bit rate) modulation with the packet error rate below 1%. The increase of the signal from 10 to 500 mW (64QAM modulation) thus increases the base station coverage area 50 times.

    摘要翻译： 公开了一种用于无线设备的新型放大器。 采用优选实施例的系统可以向64QAM（48Mb / s比特率）调制输出功​​率高达500mW的无线电信号和对于16QAM（36Mb / s比特率）调制的高达700mW的无线电信号，其中 数据包错误率低于1％。 信号从10mW（64QAM调制）的增加从而使基站覆盖区域增加50倍。

    System and method for current overload response with class D topology
    34.
    发明申请
    System and method for current overload response with class D topology 有权
    D类拓扑结构的电流过载响应的系统和方法

    公开(公告)号：US20070177322A1

    公开(公告)日：2007-08-02

    申请号：US11346104

    申请日：2006-02-02

    申请人： Karl Jacobs

    发明人： Karl Jacobs

    IPC分类号： H02H3/00

    CPC分类号： H03F3/217 ,  H03F1/52 ,  H03F1/523 ,  H03F2200/462 ,  H03F2200/507 ,  H03K17/0822 ,  H03K17/687

    摘要： A system and method for responding to a current overload condition in a power switch provides a class D topology that applies a current sink or current source to the gate of the power switch. The current sink or source decreases or increases current flowing through the power switch to regulate power switch output current in the event of an overload. A timer for current regulation can be provided to shut off the power switch if the overload condition persists. A set of differently rated switches can be used separately or together to provide a range of current regulation response, from a wide regulation range with a fast response, to a narrow regulation range with a slow response. The system provides a rapid response to an overload condition and output current regulation without disabling the power switch to overcome short term overloads.

    摘要翻译： 用于响应电力开关中的电流过载条件的系统和方法提供了将电流电流源或电流源施加到电源开关的栅极的D类拓扑。 电流源或源减少或增加流过电源开关的电流，以在过载情况下调节功率开关输出电流。 如果过载条件持续，可以提供电流调节定时器来切断电源开关。 一组不同等级的开关可以单独使用或一起使用，以便从具有快速响应的广泛调节范围到慢速响应的窄调节范围提供一系列电流调节响应。 该系统能够快速响应过载条件并输出电流调节，而不会使电源开关无法克服短时过载。

    Audio output driver and methods for use therewith
    35.
    发明申请
    Audio output driver and methods for use therewith 有权
    音频输出驱动器及其使用方法

    公开(公告)号：US20070116303A1

    公开(公告)日：2007-05-24

    申请号：US11286845

    申请日：2005-11-22

    申请人： Ajaykumar Kanji

    发明人： Ajaykumar Kanji

    IPC分类号： H03F21/00 ,  H03G3/10

    CPC分类号： H03F1/305 ,  H03F2200/03 ,  H03F2200/414 ,  H03F2200/507 ,  H03F2200/78

    摘要： An audio output driver includes an audio amplifier for generating an amplified signal. A virtual ground generator generates a virtual ground signal in response to a virtual ground reference. A combiner produces an output signal, based on the amplified signal and the virtual ground signal, that is coupled to an audio output device. A voltage equalizer equalizes the virtual ground reference and the output signal when the supply voltage compares unfavorably to a supply voltage threshold.

    摘要翻译： 音频输出驱动器包括用于产生放大信号的音频放大器。 虚拟地面发生器响应于虚拟地面参考产生虚拟地面信号。 组合器基于放大的信号和虚拟接地信号产生耦合到音频输出设备的输出信号。 当电源电压与电源电压阈值不利地相比时，电压均衡器使虚拟接地基准和输出信号相等。

    Analog signal power amplifier circuit
    36.
    发明授权
    Analog signal power amplifier circuit 失效
    模拟信号功率放大器电路

    公开(公告)号：US4546327A

    公开(公告)日：1985-10-08

    申请号：US513308

    申请日：1983-07-13

    申请人： Yasoji Suzuki ,  Itsuo Sasaki ,  Shouji Abou

    发明人： Yasoji Suzuki ,  Itsuo Sasaki ,  Shouji Abou

    IPC分类号： H03F3/20 ,  H03F3/213 ,  H03F3/45 ,  H03F3/72

    CPC分类号： H03F3/213 ,  H03F3/45183 ,  H03F3/72 ,  H03F2200/03 ,  H03F2200/507 ,  H03F2200/522 ,  H03F2203/45508 ,  H03F2203/45674

    摘要： A signal corresponding to an analog input signal is supplied to one of two input terminals of a two-input, one-output MOS differential amplifier. A reference voltage signal is supplied to the other of the two input terminals of the MOS differential amplifier. A bipolar transistor having one end connected to an analog signal output terminal is driven by a signal from the output terminal of the MOS differential amplifier. A loudspeaker is driven by the bipolar transistor.

    摘要翻译： 对应于模拟输入信号的信号被提供给双输入一输出MOS差分放大器的两个输入端中的一个。 将参考电压信号提供给MOS差分放大器的两个输入端子中的另一个。 具有连接到模拟信号输出端的一端的双极晶体管由来自MOS差分放大器的输出端的信号驱动。 扬声器由双极晶体管驱动。