Gate is replaced by an ExclusiveORgate?Whyorwhy not?Ģ.34 Make a truth table for the tristate buffers shown in FigureĢ.33. Switch produce to make the light flash when the tank isĢ.32 Repeat Problem 2.31 for the case where the AND gate isĢ.33 Will the circuit in Figure 2.46work properly if theAND Complete the sketch by drawing the waveformĢ.31 Figure 2.46 shows a circuit that will make a lamp flash atģ Hz when the gasoline level in a car’s gas tank drops belowĪ certain point. Sketch the waveform for gate output Y if the gate functionĢ.28 Repeat Problem 2.27 for the waveforms shown in FigureĢ.29 The A and B waveforms shown in Figure 2.45 are inputs (Spaces are provided for readability only.) How does this compare to the waveform that wouldĪppear at the output of an Exclusive OR gate under theĢ.27 Sketch the input waveforms represented by the followingģ2-bit sequences (use 1/4-inch graph paper, 1 square perĪ: 0000 0000 0000 1111 1111 1111 1111 0000ī: 1010 0111 0010 1011 0101 0011 1001 1011Īssume that these waveforms represent inputs to a Shown are DeMorgan equivalents of each other. Truth table show output active states for the DeMorganĢ.25 Refer to Figure 2.43. Rewrite the truth table and indicate which lines on the Convert the gate to its DeMorgan equivalent form.ĭ.
When a square waveform is applied to one input andĬ. Section 2.5 Enable and Inhibit PropertiesĢ.26 Draw the output waveform of the Exclusive NOR gate This is a common circuit that allows you to turn Indicate with an * which lines on the truth table showĢ.21 Figure 2.40 shows a circuit for a two-way switch for a
Problem 2.22 and write a more accurate description of ninputĢ.24 For each of the gates in Figure 2.42:ī. This is not the best statement of the operation of a multiple. “Output is HIGH if one input is HIGH, but not both.” Table of the function and use it to explain your reasoning.Ģ.22 Find the truth table for the logic circuit shown in FigureĢ.23 Recall the description of a 2-input Exclusive OR gate: What logic function does this represent? Draw the truth The lamp is ON when the switches are in the same positionsĪnd OFF when they are in opposite positions. The circuit also allows anyoneĬoming along after you to do the same thing, no matter On a light from either the top or the bottom of the stairwellĪnd off at the other end. Problem 2.19: Temperature and Pressure Sensors Interface produces a HIGH output to turn on the motor.ĭraw the symbol and truth table of the gate that correspondsĢ.20 Repeat Problem 2.19 for the case in which the motor is Shown in Figure 2.39 each produce a logic HIGH if the The temperature sensor and pressure sensor, Temperature and pressure of liquid in a tank exceed a certain
How many lines would the truth table of this gate have?Ģ.18 Repeat Problem 2.17 for a 5-input NOR gate.Ģ.19 A pump motor in an industrial plant will start only if the
NAND gate with inputs A, B, C, D, and E and output Y. Draw the logic circuit symbol in both distinctiveshapeĢ.15 Repeat Problem 2.14 for a 4-input NOR gate.Ģ.16 State the active levels of the inputs and outputs of aĢ.17 Write a descriptive sentence of the operation of a 5-input Write the truth table and a descriptive sentence.Ĭ. Assume theĢ.14 For a 4-input NAND gate with inputs A, B, C, and D andĪ. Why is a seriesĢ.13 Draw a circuit showing how an OR-gate output will illuminateĪn LED when the gate output is LOW. Open pushbutton be considered an active HIGH orĪctive LOW device? Briefly explain your choice.Ģ.10 Should the normally closed pushbutton be considered anĢ.11 Briefly state what is required for an LED to illuminate.Ģ.12 Briefly state the relationship between the brightness of an Briefly explain how itĢ.9 Refer to Figure 2.10 (logic pushbuttons). Section 2.2 Logic Switches and LED IndicatorsĢ.8 Sketch the circuit of a single-pole single-throw (SPST)