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Other Parts Discussed in Thread: VCA821
如图所示是VCA821的AGC电路,能否帮忙分析一下电路各个部分起到的作用,是如何实现自动增益控制的?
这个在deiyi之前有解释过,你可以搜索下。
如果实在不理解,可以自己通过TINA的spice模型仿真下。
实际上,手册中的page43都有介绍电路是怎么工作的。