March 17, Time-varying Signals, A BJT Curve Tracer

Time varying signals

Pre lab

Vout is half of the Vin since the two resistors are same. the result wave should be same shape but half amplitude.

R1=R2 in this sircuit.

Lab circuit

Original Sin wave

Result sin wave

original square wave

result square wave

original triangle wave

result triangle wave

build stair wave

In all there pattern of waves the result wave has same frequency and half the amplitude which fit our predictions.

BJT curve tracer circuit

result BJT wave which has 5 levels.  Summary:

Today we learn some new methods of circuit analysis. We talk about linear circuit.  We do a Time-Varying signal lab to see how a voltage divider actually works, and we introduce BJT, and figure out how BJT works.So that we know how to build different wave in WaveForm which could be very useful in future.