Transistor Q Point Tutorial. The q point is where the load line intersects the appropriate collector curve. For example if the amplifier is operated at i b 20 µa the q point is as shown on the graph.
The following figure shows how different practical transistors look like. We have so far discussed the constructional details of a transistor but to understand the operation of a transistor first we need to know about the biasing. A transistor acts as a good amplifier when it is in active region and when it is made to operate at q point faithful amplification is achieved.
In order to do this all we have to do is dc analysis of the transistor circuit.
From that alone we can find its q point. In addition we will also learn the most common use of transistors as amplifiers. The types of bjt are npn and pnp transistors. The following figure shows how different practical transistors look like.
