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立体声平衡测量仪立体声放大器的平衡通常是耳朵进行判断的,这样判断肯定是非常困难的。如果放大器真有一个平衡测量仪的话,一般也是中心零位的迁动线圈型测量仪,其体积过大、外观过时且价格昂贵。本电路设计可克服上述所有的问题。如图所示,每个声道的输出连到IC1的两个输入端,IC1作为差动式放大器。如果左右声道的电平相等,IC1的输出大约是电源电压的一半。如果左声道电乎大于右声道电平,IC1的输出接近OV。如果右声道比左声道响,那么输出将变为正压。
Stereo balance meter Stereo amplifier balance is usually judged by the ear, so judging is certainly very difficult. If the amplifier really has a balance meter, it is generally the center of the movement of the coil-type gauge, its volume is too large, the appearance of outdated and expensive. This circuit design can overcome all the above problems. As shown in the figure, the output of each channel is connected to both inputs of IC1 and IC1 is used as a differential amplifier. If the left and right channels are equal, the output of IC1 is about half the supply voltage. If the left channel voltage is greater than the right channel level, IC1’s output approaches 0V. If the right channel is louder than the left channel, the output will change to positive pressure.