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    Low input signal bandwidth compressor and amplifier control circuit
    2.
    发明公开
    Low input signal bandwidth compressor and amplifier control circuit 失效
    Bandritenkompressorfürniedrige Eingangssignale und SteuerschaltungfürVerstärker

    公开(公告)号：EP0724329A1

    公开(公告)日：1996-07-31

    申请号：EP96100225.0

    申请日：1996-01-09

    申请人： BBE Sound, Inc.

    发明人： Gagon, Paul R.

    IPC分类号： H03F3/181 ,  H03G7/00

    CPC分类号： H03G5/22 ,  H03G9/30

    摘要： An amplifier circuit includes a pre-amplifier 20 responsive to a program input signal, a filter circuit 60 , and an absolute value circuit 100 . The pre-amplifier 20 provides automated balancing between the high frequency channel signals and the mid range channel signals to provide a compensated signal. The filter circuit 60 is coupled to receive and automatically filter the compensated signal to provide an output signal and a modified compensated signal. The filter circuit has an adjustable bandwidth that is automatically adjusted in response to the control signal for automatically reducing the bandwidth of the filter circuit in response to lower values of the control signal to obtain the output signal. The filter circuit uses a voltage controlled amplifier or a photo cell in combination with an integrator. The absolute value circuit 100 senses the modified compensated signal and provides a control signal proportional to the average peak value of the amplitude of the modified compensated signal.

    摘要翻译： 该电路包括前置放大器（20），其对具有高，低和中等范围频率信号分量的编程输入信号作出响应，以提供经补偿的信号。 前置放大器具有AGC电路，用于平衡高和中范围信号分量。 滤波器电路（60）被耦合以接收经补偿的信号和控制信号，并提供经修改的补偿信号和输出信号。 滤波器带宽根据控制信号自动调整。 响应于控制信号的幅度值的减小，带宽被减小。 绝对值电路（100）通过提供与修改的补偿信号的幅度成比例的控制信号来响应修改的补偿信号。