March 17

Time-varying Signals
In this lab, we learned how to use the arbitrary waveform generator to generate time-varying signals and use an oscilloscope to measure the signals.

The picture shows how the circuit was connected. We set that R1=R2, so we predicted that Vout is 1/2 Vin for all 3 different waveforms.

This is a picture of the circuit. 

This is the input waveform for the sin wave. Vmax = 2V.

This is the output waveform for the sin wave. Vmax =1V.

This is the output waveform for the square wave.

This is the output waveform for the triangle wave.

All the output waveforms have  their maximum voltage output as 1/2 the input.

A BJT Curve Tracer.

The purpose of this lab is to investigate the collector current vs collector voltage of the BJT. 

This is the schematic circuit diagram.

 We plot channel 1(Vce) on the X axis, and channel 2 (Ic) on the y axis. Current Ic can be obtained from dividing C2/100 ohm
There is a linear region in between the threshold voltage and saturated voltage.