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135 条记录 (耗时 0.019 秒)

    Discrete time current multiplier circuit
    3.
    发明授权
    Discrete time current multiplier circuit 有权

    公开(公告)号：US09703991B2

    公开(公告)日：2017-07-11

    申请号：US14849529

    申请日：2015-09-09

    申请人： Raytheon Company

    发明人： Denpol Kultran ,  Won Chon ,  Harry B. Marr

    IPC分类号： G06G7/163 ,  H03H15/00 ,  H03F1/30

    CPC分类号： G06G7/163 ,  H03F1/301 ,  H03F1/304 ,  H03H15/00

    摘要： There is provided a programmable multiplier circuit for multiplying an input voltage signal by a binary coefficient, the multiplier circuit including a transconductor including a first amplifying transistor configured to convert the input voltage signal to a current signal, the first amplifying transistor having a gate configured to receive the input voltage signal, and a coefficient multiplier coupled to the transconductor and configured to multiply the current signal by the binary coefficient to generate an amplified current signal.

    Transmitter circuit and communication apparatus
    5.
    发明授权
    Transmitter circuit and communication apparatus 有权
    发射机电路和通信设备

    公开(公告)号：US08396432B2

    公开(公告)日：2013-03-12

    申请号：US13381240

    申请日：2010-04-01

    申请人： Ryo Kitamura ,  Kaoru Ishida ,  Mikihiro Shimada ,  Hiroshi Komori

    发明人： Ryo Kitamura ,  Kaoru Ishida ,  Mikihiro Shimada ,  Hiroshi Komori

    IPC分类号： H04B1/04

    CPC分类号： H03F1/0261 ,  H03F1/304 ,  H03F1/32 ,  H03F3/245 ,  H03F2200/108 ,  H03F2200/18 ,  H03F2200/408 ,  H03F2200/468

    摘要： A transmitter circuit is provided which is capable of reducing modulation distortion even when an output power of a power amplifying section 141 is low. A signal generation section 11 generates an amplitude signal and a phase signal. A regulator 12 outputs a current based on the amplitude signal. A phase modulation section 13 phase-modulates the phase signal, and outputs a phase-modulated signal. The power amplifying section 141 receives the current which is based on the amplitude signal and supplied as a bias current from the regulator 12, and amplifies the phase-modulated signal by using the supplied current. Further, to the power amplifying section 141, a predetermined DC voltage is supplied as a collector voltage.

    摘要翻译： 提供一种即使当功率放大部分141的输出功率低时也能够降低调制失真的发射机电路。 信号生成部11生成振幅信号和相位信号。 调节器12基于振幅信号输出电流。 相位调制部13对相位信号进行相位调制，并输出相位调制信号。 功率放大部分141接收基于振幅信号并作为偏置电流从调节器12提供的电流，并且通过使用所提供的电流放大相位调制信号。 此外，向功率放大部141提供预定的DC电压作为集电极电压。

    Amplifier, transmitter, and method for compensating gain
    6.
    发明授权
    Amplifier, transmitter, and method for compensating gain 有权
    用于补偿增益的放大器，发射器和方法

    公开(公告)号：US08253489B2

    公开(公告)日：2012-08-28

    申请号：US12756295

    申请日：2010-04-08

    申请人： Fumihiro Tomisawa ,  Tatsuhiko Tajima

    发明人： Fumihiro Tomisawa ,  Tatsuhiko Tajima

    IPC分类号： H03G3/20

    CPC分类号： H03F1/304 ,  H03F1/301

    摘要： An amplifier includes a voltage detector that detects current flowing to a drain terminal of a transistor which amplifies a signal using GaN as a voltage difference by means of voltage conversion, a compensation decision unit that decides whether or not to perform gain compensation based on the voltage difference detected by the voltage detector, and a gain compensation unit that performs the gain compensation according to the voltage difference when the compensation decision unit decides to perform the gain compensation.

    摘要翻译： 放大器包括：电压检测器，其检测流过晶体管的电流的电流，该晶体管通过电压转换将使用GaN放大的信号放大为电压差;补偿判定单元，其基于电压判定是否进行增益补偿 由电压检测器检测的差值;以及增益补偿单元，其在补偿判定单元决定执行增益补偿时根据电压差执行增益补偿。

    DC OFFSET COMPENSATION
    7.
    发明申请
    DC OFFSET COMPENSATION 有权
    直流偏移补偿

    公开(公告)号：US20120154032A1

    公开(公告)日：2012-06-21

    申请号：US13327009

    申请日：2011-12-15

    申请人： John Paul Lesso

    发明人： John Paul Lesso

    IPC分类号： H03F1/38

    CPC分类号： H03F3/181 ,  H03F1/304 ,  H03F3/183 ,  H03F2200/03 ,  H03K3/013

    摘要： An apparatus and method for DC offset compensation. An amplifier receives an input signal (AIN) and provides an amplified output signal (SOUT) and a feedback path provides DC offset compensation. The feedback path comprises at least one voltage controlled oscillator (VCO) and a counter. The VCO provides, over time, a first VCO output signal based on said amplified output signal and a second VCO output signal based on a reference signal (VREF). The counter generates first pulse counts based upon the first VCO output signal and second pulse counts based upon the second VCO output signal and provides a compensation signal based on a comparison of the first and second pulse counts. One voltage controlled oscillator may sequentially receive a signal based on said amplifier output signal and the reference signal from a multiplexer so as to sequentially produce the first and second VCO output signals.

    摘要翻译： 一种用于直流偏移补偿的装置和方法。 放大器接收输入信号（AIN）并提供放大的输出信号（SOUT），反馈路径提供DC偏移补偿。 反馈路径包括至少一个压控振荡器（VCO）和计数器。 VCO随时间提供基于所述放大的输出信号的第一VCO输出信号和基于参考信号（VREF）的第二VCO输出信号。 计数器基于第一VCO输出信号和基于第二VCO输出信号的第二脉冲计数产生第一脉冲计数，并且基于第一和第二脉冲计数的比较来提供补偿信号。 一个压控振荡器可以基于所述放大器输出信号和来自多路复用器的参考信号顺序地接收信号，以便顺序产生第一和第二VCO输出信号。

    Audio signal processing system and method
    9.
    发明授权
    Audio signal processing system and method 有权
    音频信号处理系统及方法

    公开(公告)号：US07728660B2

    公开(公告)日：2010-06-01

    申请号：US12194435

    申请日：2008-08-19

    申请人： Michael Determan

    发明人： Michael Determan

    IPC分类号： H03F3/38

    CPC分类号： H03F1/304 ,  H03F1/3264 ,  H03F3/217

    摘要： An audio signal processing system and method is disclosed. In a particular embodiment, the audio signal processing system includes a first electrical path responsive to a power supply of an audio amplifier. The first electrical path can include a low pass filter to filter a direct current (DC) component of the power supply and a first analog-to-digital converter (ADC) responsive to the low pass filter. The audio signal processing system also includes a second electrical path responsive to the power supply. The second electrical path can include a high pass filter to filter an alternating current (AC) component of the power supply and a second ADC responsive to an output of the high pass filter. The audio signal processing system includes compensation logic to modify an audio signal based on a first signal generated from the first electrical path and a second signal generated from the second electrical path.

    摘要翻译： 公开了一种音频信号处理系统和方法。 在特定实施例中，音频信号处理系统包括响应于音频放大器的电源的第一电路径。 第一电路可以包括低通滤波器以对电源的直流（DC）分量进行滤波，以及响应于低通滤波器的第一模数转换器（ADC）。 音频信号处理系统还包括响应于电源的第二电路径。 第二电路可以包括高通滤波器以对电源的交流（AC）分量进行滤波，以及响应于高通滤波器的输出的第二ADC。 音频信号处理系统包括基于从第一电路产生的第一信号和从第二电路产生的第二信号来修改音频信号的补偿逻辑。

    Audio Amplifier
    10.
    发明申请
    Audio Amplifier 有权
    音频放大器

    公开(公告)号：US20100014694A1

    公开(公告)日：2010-01-21

    申请号：US12501816

    申请日：2009-07-13

    申请人： John B. French ,  Andrew Mason

    发明人： John B. French ,  Andrew Mason

    IPC分类号： H03F99/00

    CPC分类号： H03F1/304 ,  H03F1/0227 ,  H03F3/2173 ,  H03F3/68 ,  H03F2200/03 ,  H04R3/00

    摘要： The embodiments described herein relate to amplifier circuits with power rails. The power rails are generated in response to an input signal, which will typically be an audio signal, and with a sufficient magnitude to power the amplifier and to generate an output signal corresponding to the input signal.

    摘要翻译： 这里描述的实施例涉及具有电源轨的放大器电路。 电源轨是响应于通常为音频信号的输入信号产生的，并具有足够的幅度来为放大器供电并产生对应于输入信号的输出信号。