我看到数据手册上写的，他的压控输入电压内增益变化是线性的，但是我仿真出来他的增益变化在1V到-0.5都在总的增益上缓慢减小，变化在0.几DB内变化。到了-0.9V猛地跳变到了负的增益。这是为什么啊？
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