EE 212 Lab
Prelab 3: Square Waves and RC Time Constants
For the RC circuit of figure 1 in Lab 3:
What is the theoretical time constant &tau ("tau") for the circuit?
Sketch one period of the output waveform on top of the input square wave
with period T shown, where
T = 10 &tau
T = 1 &tau
T = &tau / 10
Calculate the relationship between the 10% to 90% rise time (as shown in
the figure below), and the time constant &tau for the circuit's step
response. Hint: you'll need to solve for the step response of the circuit.