Figure 34. Input and output pulses for a highpass,
longtimeconstant, series RC circuit
c. After 10 usec, the applied voltage remains at 10 volts for 30
usec and the capacitor charges slowly toward the applied voltage at a
rate determined by the universal time constant chart. During this
time, the output voltage ER decreases at the same rate.
d. After 40 usec, the applied voltage starts to decay. The
capacitor voltage remains constant until the applied voltage has
decayed to a value equal to Ec. During this time, the output voltage
ER decreases rapidly as the applied voltage. When the applied
voltage is equal to Ec, the output voltage ER is equal to the
difference between Ec and E, or zero. As E decreases toward zero, Ec
also decreases, but follows a more gradual decay curve.
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