EE 212

                                        Prelab 3: Square Waves and RC Time Constants

1. For the RC circuit of figure 1 of the lab:

  1. (a) What is the theoretical time constant t ("tau") for the circuit?



    (b) Sketch one period of the output waveform on top of the input square wave with period T shown, where:

        i)  T = 10t








        ii)  T = t






        iii) T = 0.1t










    (c) Calculate the relationship between the 10% to 90% rise time (as shown below) and the time constant t for the circuit's step response. Hint: you'll need to solve for the step response of the circuit.