Theory
As the tape leaves the tape head, the applied bias partially offsets the tape's field and the remaining net induction is essentially the difference between the positive and negative half-cycles of the previously recorded signal. This differencing operation further cancels some of the nonlinearity. A constantly, rapidly varying magnetic field also helps overcome magnetic hysteresis (the tendency of paramagnetic materials to resist either being magnetized or releasing its magnetism) of both the recording head and the tape medium.
Read more about this topic: Tape Bias
Famous quotes containing the word theory:
“Could Shakespeare give a theory of Shakespeare?”
—Ralph Waldo Emerson (1803–1882)
“The theory of rights enables us to rise and overthrow obstacles, but not to found a strong and lasting accord between all the elements which compose the nation.”
—Giuseppe Mazzini (1805–1872)
“No one thinks anything silly is suitable when they are an adolescent. Such an enormous share of their own behavior is silly that they lose all proper perspective on silliness, like a baker who is nauseated by the sight of his own eclairs. This provides another good argument for the emerging theory that the best use of cryogenics is to freeze all human beings when they are between the ages of twelve and nineteen.”
—Anna Quindlen (20th century)