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    • 4. 发明申请
    • DYNAMIC CONSTANT POWER AMPLIFIER
    • 动态恒功率放大器
    • WO2011087656A2
    • 2011-07-21
    • PCT/US2010/060062
    • 2010-12-13
    • ROCKFORD CORPORATIONALBERS, Mark, D.STRICKLAND, James, C.BAKER, David Dean
    • ALBERS, Mark, D.STRICKLAND, James, C.BAKER, David Dean
    • H03F3/2173H03F1/52H03F2200/03H03F2200/351H03G11/00
    • A switching amplifier including a voltage sensor circuit connected to a high voltage supply rail for measuring the power supply voltage. A current sensor circuit is connected to the high voltage supply rail for measuring the power supply current. An error amplifier is connected to the switching amplifier and receives one or more values based on the measurements taken by the voltage sensor and current sensor, and the error amplifier produces an error signal when a predetermined power limit is exceeded. A signal limiting circuit is connected to the error amplifier and the switching amplifier and limits the output power to rated power at any rated load impedance when the error amplifier produces the error signal. This switching amplifier is capable of automatically limiting output power at rated power into all rated load impedances, and dynamically reacts to the frequency-dependant impedance of a typical audio system.
    • 开关放大器包括连接到用于测量电源电压的高压电源轨的电压传感器电路。 电流传感器电路连接到高压电源轨以测量电源电流。 误差放大器连接到开关放大器并根据电压传感器和电流传感器的测量结果接收一个或多个值,并且当超过预定的功率限制时,误差放大器产生误差信号。 当误差放大器产生误差信号时,信号限制电路连接到误差放大器和开关放大器,并将输出功率限制在任何额定负载阻抗下的额定功率。 该开关放大器能够将额定功率下的输出功率自动限制为所有额定负载阻抗,并动态响应典型音频系统的频率相关阻抗。