10.1.4 Series RC Circuit, Square Wave Input

• When a square pulse is applied to the RC circuit, a decidedly non-square pulse, with slow rise and slow decay, results.
• The capacitor has allowed us to do a limited amount of wave shaping.

• Response to square wave:

• b: Short time constant compare to square-wave period
• c: Time constant is a substantial fraction of the pulse length
• d: Time constant is longer than square-wave period (transient does not go to completion)

• For large RC, the capacitor voltage is approximately the integral of the input voltage (useful signal-processing property)