8 - Time Varying signals & BJT Curve Tracers

INTRO: Today we dealt with Time Varying signals and BJT Curve tracers. Time Varying Signals are a concept we have covered several time over the physics series. With time, the signal changes, often in geometric shapes. A BJT Curve tracer is a newer concept that will be further explained later on in the blog.

Above we used the Waveform Generator to create time-varying signals. There are two different types of signals on the left and right

Here are two additional time varying signals.We have a triangular one in this picture

LAB: Time-Varying Signals

In this lab we dealt with time-varying signals, which were described above. We estimate what the Vout and Vin are going to be with our time-varying signals.

LAB: A BJT Curve Tracer

In this lab our purpose is to investigate the collector current vs. the collector voltage of a BJT Transistor.

 

Above is the diagram that we are using for this lab. You should be able to recognize the BJT configuration from the prior lab.

 

Here is the physical circuit that we used for this lab.

Here is the graph of our 5-step voltage supply. As all the graphs show, we have the threshold, a linear relationship, and then saturation.