Bias (electronics)

In electronic circuit technology, bias ([ baiəs ]) is a constant, one-sided variable, such as an electrical voltage or electrical current , which is specifically superimposed on the electrical signal.

Manifestations

• To set a desired operating point of an amplifier , a bias in the form of a direct current or a direct voltage is added to the input signal.
• With some amplifier types, such as an operational amplifier , the bias is also used to compensate for the parasitic input bias currents with an offset voltage .
• In tape recorders and cassette recorders , bias describes a premagnetization of the tape material, which is achieved by superimposing a high-frequency signal (60–200 kHz) during recording.

literature

• Paul Horowitz, Winfield Hill: The Art of Electronics . 2nd Edition. Cambridge University Press, 1989, ISBN 0-521-37095-7 .
• Paul Horowitz, Winfield Hill: The Art of Electronics . 3. Edition. Cambridge University Press, 2015, ISBN 0-521-80926-6 .