What is biasing?

[Chavi]

What is biasing (in electricity?)

[Stojad]

Biasing, in electricity, most likely refers to the direction a polar circuit component like a diode has been placed in a circuit. Consider a simple diode: it has a positive end, the anode, and a negative end, the cathode. If it is placed in a circuit such that the current will pass through the anode first and then through the cathode, it is forward biased. When a diode is reverse biased, the diode has been turned around so that the current passes through the cathode before the anode. Very little current (assumed to be 0A) flows through a reverse biased diode unless the voltage applied to it is very large. You need to know the direction of the current in order to determine whether a diode is forward biased or reverse biased.

[Stroodle]

Otherwise, if you're talking about amplification, biasing refers to adjusting the input voltage so that the maximum output voltage can be achieved (i.e where you can get the largest output voltage without any 'clipping' or 'cutoff' which results in distortion). On an amplification transfer characteristic this biased voltage is represented by the value on the horizontal axis directly below the quiescent point (the midpoint of the slope on the graph).

[kenhung123]

But if its amplified by a factor, even though set to the middle, the maximum input can go up to the maximum output value? So multiplying the max input would surpass max output and still distort?