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    AUDIO AMPLIFIER AND METHOD OF OPERATING THE SAME
    1.
    发明公开
    AUDIO AMPLIFIER AND METHOD OF OPERATING THE SAME 审中-公开

    公开(公告)号：US20240267008A1

    公开(公告)日：2024-08-08

    申请号：US18525479

    申请日：2023-11-30

    申请人： SAMSUNG ELECTRONICS CO., LTD.

    发明人： INHWAN CHO ,  MYUNG-JIN LEE

    IPC分类号： H03F3/217 ,  H03F3/45

    CPC分类号： H03F3/2171 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2200/351 ,  H03F2203/45424 ,  H03F2203/45434

    摘要： An audio amplifier includes a loop filter configured to receive a differential input signal pair, a pulse-width modulation (PWM) signal generator configured to generate PWM signals, corresponding to the differential input signal pair, based on signals received from the loop filter, a driver configured to generate an output signal pair based on the PWM signals, a feedback circuit configured to feed back the output signal pair to the loop filter, and a common mode compensation circuit configured to compensate for a fluctuation in a common mode voltage of the fed-back output signal pair. The common mode compensation circuit generates a compensation voltage for each of a plurality of levels of the common mode voltage, and provides the generated compensation voltage to the loop filter.

    Instrumentation amplifier with rail-to-rail input range
    8.
    发明授权
    Instrumentation amplifier with rail-to-rail input range 有权
    仪表放大器，具有轨到轨输入范围

    公开(公告)号：US08823453B2

    公开(公告)日：2014-09-02

    申请号：US13670743

    申请日：2012-11-07

    申请人： Semtech Corporation

    发明人： Olivier Nys ,  Francois Krummenacher

    IPC分类号： H03F3/45

    CPC分类号： H03F1/52 ,  H03F1/3211 ,  H03F3/3022 ,  H03F3/45183 ,  H03F3/45475 ,  H03F3/45645 ,  H03F3/45941 ,  H03F3/45973 ,  H03F2200/261 ,  H03F2203/45082 ,  H03F2203/45138 ,  H03F2203/45431 ,  H03F2203/45434 ,  H03F2203/45441 ,  H03F2203/45528

    摘要： A system and method for adjusting a common mode output voltage in an instrumentation amplifier is provided. In one aspect, the common mode output voltage is increased or decreased with respect to the common mode input voltage to enable high amplification of the signal input to the instrumentation amplifier. Moreover, the common mode output voltage can be driven to (or approximately to) a target voltage value such as, but not limited to, half the supply, even if the common mode input voltage is close to supply or ground rail voltage. Thus, a high amplification of the differential input voltage can be obtained and utilized for various applications requiring rail to rail input.

    摘要翻译： 提供了一种用于调整仪表放大器中的共模输出电压的系统和方法。 在一个方面，共模输出电压相对于共模输入电压增加或减小，以便能够对输入到仪表放大器的信号进行高放大。 此外，即使共模输入电压接近电源或接地电压，共模输出电压也可以被驱动到（或近似）目标电压值，例如但不限于电源的一半。 因此，可以获得差分输入电压的高放大率并且用于需要轨对轨输入的各种应用。

    Amplifier circuit, signal processor circuit, and semiconductor integrated circuit device
    10.
    发明授权
    Amplifier circuit, signal processor circuit, and semiconductor integrated circuit device 有权
    放大器电路，信号处理电路和半导体集成电路器件

    公开(公告)号：US08324968B2

    公开(公告)日：2012-12-04

    申请号：US13075227

    申请日：2011-03-30

    申请人： Kazutaka Honda ,  Tetsuya Makihara ,  Masakiyo Horie

    发明人： Kazutaka Honda ,  Tetsuya Makihara ,  Masakiyo Horie

    IPC分类号： H03F3/45

    CPC分类号： H03F3/45183 ,  H03F3/45192 ,  H03F3/45659 ,  H03F2200/261 ,  H03F2203/45404 ,  H03F2203/45421 ,  H03F2203/45424 ,  H03F2203/45434 ,  H03F2203/45512 ,  H03F2203/45514 ,  H03F2203/45544 ,  H03F2203/45726 ,  H03F2203/45728

    摘要： An amplifier circuit is provided to be switchable between a single end output configuration and a differential output configuration without increasing a circuit area. When first and fourth switches are turned off and a second switch is turned on, a load circuit functions as an active load on a differential pair and a first output terminal is internally disconnected. The amplifier circuit is provided with a single end output configuration and differentially amplifies input voltages inputted to input terminals and outputs an imbalanced signal from a second output terminal. When the first and fourth switches are turned on and the second switch is turned off, the load circuit functions as a load on the differential pair and the first output terminal is internally connected. The amplifier circuit is provided with a differential output configuration and differentially amplifies the input voltages inputted to the input terminals and outputs balanced signals from the output terminals.

    摘要翻译： 提供放大器电路以在单端输出配置和差分输出配置之间切换，而不增加电路面积。 当第一和第四开关断开并且第二开关导通时，负载电路用作差分对上的有效负载，并且第一输出端子在内部断开。 放大器电路具有单端输出配置，差分放大输入到输入端的输入电压，并从第二输出端输出不平衡信号。 当第一和第四开关接通并且第二开关断开时，负载电路用作差动对上的负载，并且第一输出端子被内部连接。 放大器电路具有差分输出配置，差分放大输入到输入端的输入电压，并从输出端输出平衡信号。