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在图1所示的电路中,决定频率的元件是个标准的有源滤波器,其中心频率为3200Hz,品质因数为10,增益为1。决定振幅的元件是过零检测器,其输出由一个电阻分压器控制。
In the circuit shown in Figure 1, the element that determines the frequency is a standard active filter with a center frequency of 3200 Hz, a figure of merit of 10 and a gain of one. The component that determines the amplitude is a zero-crossing detector whose output is controlled by a resistor divider.