Voltage controlled power supply second-order high-pass filter circuit

High-pass filters are used to pass high-frequency signals and attenuate or suppress low-frequency signals.
    By exchanging the resistors and capacitors that play a filtering role in the low-pass filter circuit, it can become a second-order active high-pass filter. The performance of a high-pass filter is
opposite to that of a low-pass filter, and its frequency response is a "mirror image" of the low-pass filter. The circuit of
    a voltage-controlled voltage source second-order high-pass filter is shown in the figure.
    The integrated operational amplifier AJ in the picture uses dual operational amplifier vA747.