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图中红色圈内是稳压管吗?这个稳压管会影响放大器的工作,它将放大器的R1和R2电压稳定在一定值了。
仿真的话,您可以使用TINA-TI仿真,在LM2904产品首页如下截图路径提供了其仿真模型。
LM2904 产品首页链接:https://www.ti.com.cn/product/cn/LM2904