Analysis of information sources in references of the Wikipedia article "Negative-feedback amplifier" in English language version.
Masking is a principle concept in the perception of distortion, as distortion products will only contribute to the percept of distortion if they are not masked by the primary stimulus or other distortion products.
β is the feedback loop attenuation, or feedback factor ... noise gain is equal to 1/β
editions:BZ69IvJlfW8C.
most of the harmonic distortion has been masked, however, a couple of the high order harmonics were far enough away in frequency and loud enough to be heard. So in order to determine the audibility of harmonic distortion, we have to know how much masking is done by different tones at different loudness levels.
dividing a circuit into smaller parts ...[so]...the number of connections between parts is minimized
In real cases, unfortunately, blocks...cannot be assumed to be unidirectional.
{{cite journal}}: CS1 maint: multiple names: authors list (link)Of course this experiment gives the impression that more feedback is worse. You have to get past that bump. Hardly anybody who has ever tried it like this has actually heard the inevitable (and frankly magical) improvement that happens once you do get beyond, say 20 or 30dB. From there on you get an unambiguous net improvement that goes on forever.
{{cite journal}}: CS1 maint: multiple names: authors list (link)Great care must be exercised in applying two-port theory to ensure that the amplifier feedback networks can actually be represented as two-ports
Here we see that as low feedback figures are applied to a single gain stage the 2nd harmonic declines linearly with feedback, but increased amounts of higher order harmonics are created. As feedback increases above about 15 dB or so, all these forms of distortion [decline] in proportion to increased feedback.
{{cite journal}}: CS1 maint: multiple names: authors list (link){{cite journal}}: CS1 maint: multiple names: authors list (link)Dreadnaught III uses no global negative feedback.
{{cite journal}}: CS1 maint: multiple names: authors list (link)Dreadnaught III uses no global negative feedback.