Excess current and saturation detection and correction in a power amplifier
    4.
    发明授权
    Excess current and saturation detection and correction in a power amplifier 有权
    在功率放大器中过电流和饱和度检测和校正

    公开(公告)号:US07962109B1

    公开(公告)日:2011-06-14

    申请号:US11679201

    申请日:2007-02-27

    IPC分类号: H04B17/00

    CPC分类号: H03G3/3047

    摘要: A system and method for detecting and correcting over-current and/or over-voltage conditions in power amplifier circuitry in a transmit chain of a mobile terminal are provided. In general, over-current detection and correction circuitry combines a current detection signal indicative of a current provided to or drained by the power amplifier circuitry during ramp-up for a transmit burst and a substantially inverse current ramping profile to provide a first constant value. The first constant value is compared to a current threshold or limit value to determine whether an over-current condition exists. If an over-current condition exists, the over-current detection and correction circuitry operates to reduce the output power of the power amplifier circuitry during ramp-up for the transmit burst to correct for the over-current condition. In a similar manner, over-voltage detection circuitry operates to detect and correct over-voltage conditions during ramp-up for the transmit burst.

    摘要翻译: 提供了一种用于在移动终端的发射链中的功率放大器电路中检测和校正过电流和/或过电压条件的系统和方法。 通常,过电流检测和校正电路组合指示在斜波上升期间功率放大器电路提供给发射脉冲串的电流的电流检测信号和用于发射脉冲串的基本上反向电流斜坡分布以提供第一恒定值。 将第一常数值与当前阈值或限制值进行比较,以确定是否存在过电流条件。 如果存在过电流状况,则过流检测和校正电路用于在发射突发的斜坡上降低功率放大器电路的输出功率,以校正过电流状况。 以类似的方式,过电压检测电路用于在发射突发的斜坡上升期间检测和校正过电压状况。