中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

2 records (took 0.019 seconds)

    Method of preventing abrupt voltage changes at the outputs of a pair of amplifiers and control circuit for a pair of amplifiers self-configuring in a bridge configuration
    1.
    发明公开
    Method of preventing abrupt voltage changes at the outputs of a pair of amplifiers and control circuit for a pair of amplifiers self-configuring in a bridge configuration 有权
    一种用于防止突然的电压变化在放大器对和控制电路，用于自配置对放大器的输出在桥配置方法

    公开(公告)号：EP1548933A1

    公开(公告)日：2005-06-29

    申请号：EP03425816.0

    申请日：2003-12-23

    Applicant: STMicroelectronics S.r.l.

    Inventor： Chelli, Fabio ,  Brambilla, Davide

    IPC: H03F3/68 ,  H03F1/02

    CPC classification number: H03F3/45475 ,  H03F1/0277 ,  H03F1/32 ,  H03F3/3081 ,  H03F3/68 ,  H03F2200/03 ,  H03F2200/114 ,  H03F2203/45138

    Abstract: A method of preventing abrupt voltage changes at the outputs of a pair of amplifiers and a common mode control circuit of a pair of amplifiers that reduce EMI and increased distortions occur when the correlation between the signals that are fed to the four channels of the audio system diminishes has been found.
    This result is attained by properly generating for each amplifier a reference potential as a saturated replica of the respective differential input signal of the amplifier that saturates when the amplifier switches to a bridge configuration.
    This method is implemented in a common mode control circuit for a pair of amplifiers self-configuring in a bridge configuration for driving a first load and in a single-ended mode of operation of one of the amplifiers for driving the first load, in function of the level of a differential input signal, comprising for at least one of the pair of amplifiers a common mode feedback differential amplifier, a storage capacitor connected between any one of the two inputs of the feedback amplifier and a node at a reference potential, by providing the common mode control circuit of means for generating this reference potential.

    Abstract translation: 在一对放大器和一对放大器的共模控制电路的输出防止急剧的电压变化的方法确实减少了EMI和增加的扭曲时出现的信号之间的相关性也被馈送到音频系统的四个信道 减少被发现。 该结果是通过适当地产生用于每个放大器的基准电位作为放大器的respectivement差分输入信号的一个副本饱和并达到饱和当放大器切换到桥配置。 该方法在共模控制电路来实现的用于一对放大器-配置在自桥配置用于驱动第一负载并且在放大器中的一个的操作的单端模式的用于驱动第一负载 在差分输入信号的电平的功能，包括用于对放大器的共模反馈差分放大器，连接在反馈放大器的所述两个输入中的任何一个，并在参考节点之间的存储电容器中的至少一个 电位，通过用于产生该基准电位供给装置的共模控制电路。

Patent Agency Ranking