Sigh.
Tom
Sent from an iThing; please excuse the terseness and typos
toggle quoted message
Show quoted text
On Mar 25, 2021, at 6:56, "Torch" <tekscopes@...> wrote:
1 + -1 = 0
Unwanted noise is a side effect of amplifying a desired signal. The ratio of internal noise to desired signal is greatest at the first stage of amplification and magnified in further stages. If a portion of the signal coming from the first amplification stage is inverted and fed back to the input, it will tend to cancel the internally generated noise more so than the desired signal, improving the ratio seen by the input of the next stage.
