If the resistor voltage in a differentiating circuit is down to + 2.4 V at the end of a 14 V input pulse, to what negative value will the resistor voltage go in response to the falling edge of the input?
A) -11.6 V
B) -16.4 V
C) -14 V
D) -2.4 V

Question

Quizplus · Accepted Answer

The voltage change due to the falling edge of the input pulse will be equal in magnitude but opposite in sign to the change caused by the rising edge. Since the voltage went from 0 to +2.4 V in response to a 14 V input pulse, the falling edge will cause it to go from +2.4 V to -11.6 V, which is a change of -14 V (2.4 V - 16.4 V = -14 V).

If the Resistor Voltage in a Differentiating Circuit Is Down