don johson

Purpose The objective of this lab is to introduce the Bipolar Junction Transistor (BJT). A BJT is a three terminal device composed of an emitter, base, and collector terminals. In this lab we will introduce two major types of BJT’s : npn and pnp. The first, npn, has an n-type emitter, a p-type base and a n-type collector. On the other hand the pnp has a p-type emitter, a n-type base, and a p-type collector. …

…Calculations *are attached Conclusion In conclusion from the results obtained in Activities Two and Three, the branch currents and node voltages of npn and pnp transistors, it can be said that the transistor currents depend more on the emitter potential than the collector potential. Also the error that is seen in calculating  from and  from  is caused by the fact that the resistor do not all have the same values, they are not completely matched.