由于国庆节假期,帖子审批以及工程师回复将会有所延迟,敬请谅解

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VCA821增益较低时自激

Other Parts Discussed in Thread: VCA821

在Vg管脚不接外接电源时,默认为3.3V左右?这个我也不是很清楚,但此时波形较为正常,且增益为理论最大增益,对Vg进行调节后,产生自激现象,请假一下这是为什么,电路图下图所示