五、门电路门电路是使声源信号或控制信号在其它控制信号作用下通过或截止的电路。信号通过量是由电压控制的,所以叫作压控衰减器或压控放大器,简称为“门”电路。此外,因为其工作原理完全与产生震音的调制器相同,所以也可以称作振幅调制器。如图11所示,把门电路接于正弦波信号源输出端、以来自包络线发生器的控制信号对门电路进行控制时,在门电路输出端可产生其包 Fifth, the door circuit Door circuit is to make the sound source signal or control signal through the other control signal through or off the circuit. Signal throughput is controlled by voltage, so called pressure-controlled attenuator or voltage-controlled amplifier, referred to as the “gate” circuit. In addition, because it works exactly the same as a modulator producing a tremolo, it can also be called an amplitude modulator. As shown in Fig. 11, when the gate is connected to the output terminal of the sine wave signal source and the gate is controlled by the control signal from the envelope generator, its output can be generated at the output of the gate