同相比例放大器
根据理想运放传输特性,当增益Auo很大时,需要保证运放差模输入电压趋近于0,同相端输入,反相端要进行一个负反馈,使得反相端输入电压随同相端输入电压保持动态平衡,满足运放差模输入电压趋近于0。
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