为什么AF>1就是负反馈?我想不通(从公式看确实是这样,但是从道理上想不通) 比如以这个图为例(字母上的那个点点我打不出来)假设 A = 5 放大5倍 , F = 1/5 反馈五分之一 , 输入Xi = 1 则一开始 X
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![为什么AF>1就是负反馈?我想不通(从公式看确实是这样,但是从道理上想不通) 比如以这个图为例(字母上的那个点点我打不出来)假设 A = 5 放大5倍 , F = 1/5 反馈五分之一 , 输入Xi = 1 则一开始 X](/uploads/image/z/10436896-64-6.jpg?t=%E4%B8%BA%E4%BB%80%E4%B9%88AF%3E1%E5%B0%B1%E6%98%AF%E8%B4%9F%E5%8F%8D%E9%A6%88%3F%E6%88%91%E6%83%B3%E4%B8%8D%E9%80%9A%EF%BC%88%E4%BB%8E%E5%85%AC%E5%BC%8F%E7%9C%8B%E7%A1%AE%E5%AE%9E%E6%98%AF%E8%BF%99%E6%A0%B7%2C%E4%BD%86%E6%98%AF%E4%BB%8E%E9%81%93%E7%90%86%E4%B8%8A%E6%83%B3%E4%B8%8D%E9%80%9A%EF%BC%89+%E6%AF%94%E5%A6%82%E4%BB%A5%E8%BF%99%E4%B8%AA%E5%9B%BE%E4%B8%BA%E4%BE%8B%28%E5%AD%97%E6%AF%8D%E4%B8%8A%E7%9A%84%E9%82%A3%E4%B8%AA%E7%82%B9%E7%82%B9%E6%88%91%E6%89%93%E4%B8%8D%E5%87%BA%E6%9D%A5%29%E5%81%87%E8%AE%BE+A+%3D+5+%E6%94%BE%E5%A4%A75%E5%80%8D+%2C+F+%3D+1%2F5+%E5%8F%8D%E9%A6%88%E4%BA%94%E5%88%86%E4%B9%8B%E4%B8%80+%2C+%E8%BE%93%E5%85%A5Xi+%3D+1+%E5%88%99%E4%B8%80%E5%BC%80%E5%A7%8B+X)
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