One question is "What if Vas is not equal to vce? The answer is that a different value of BB, in conjunction with the R produces a certain la. When the Vaa is made a, equal to voc by using a single DC source, Ra can be adjusted to achieve the same In other words, there is no reason for VaB to be different from V Hence, the common- emitter amplifier can run from a single cc sources are of the same value and DC source, because both polarity. With the common-emitter configuration, several biasing methods can be employed. We will now explore these biasing methods.