Part 2: Bias

When a positive voltage is applied to the anode the diode is said to have forward bias. When it is forward biased (and the voltage exceeds the barrier voltage) it will conduct.

When the voltage is reversed, the diode is said to have reverse bias. When it is reversed biased, it will not conduct unless the voltage is so high that it exceeds the breakdown voltage of the diode.


Diode PackageDiodes come in a range of sizes: the cathode is usually identified by a stripe at one end of the package.