(Analog versus Digital) Consider the inverter transfer characteristic described in Figure 1.16. Suppose two inverter circuits are placed in series so that the output of the first inverter is the input to the second inverter. Assume initially that the input to the first stage is a logic 1 represented by 3 volts. Of course, the output of the second stage will be identical, at least initially. Describe what happens to the outputs of the first and second stages as the first stage input slowly changes from 3 volts to 0 volts. Do this by drawing a graph whose X axis is time and whose Y axis is voltage, showing two curves, one each for (a) the first inverter’s output and (b) the second inverter’s output.
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