Digital Electronics-Logic Gates
Digital Electronics-Logic Gates
31. One advantage TTL has over CMOS is that TTL is ________.
- less expensive
- not sensitive to electrostatic discharge
- faster
- more widely available
32. A 2-input NOR gate is equivalent to a ________.
- negative-OR gate
- negative-AND gate
- negative-NAND gate
- none of the above
33. If a 3-input OR gate has eight input possibilities, how many of those possibilities will result in a HIGH output?
- 1
- 2
- 7
- 8
35. How many input combinations would a truth table have for a six-input AND gate?
- 32
- 48
- 64
- 128
36. What is the circuit number of the IC that contains four two-input AND gates in standard TTL?
- 7402
- 7404
- 7408
- 7432
37. The terms "low speed" and "high speed," applied to logic circuits, refer to the ________.
- rise time
- fall time
- propagation delay time
- clock speed
38. The NOR logic gate is the same as the operation of the ________ gate with an inverter connected to the output.
- OR
- AND
- NAND
- none of the above
39. With regard to an AND gate, which statement is true?
- An AND gate has two inputs and one output.
- An AND gate has two or more inputs and two outputs.
- If one input to a 2-input AND gate is HIGH, the output reflects the other input.
- A 2-input AND gate has eight input possibilities.
40. The term "hex inverter" refers to:
- an inverter that has six inputs
- six inverters in a single package
- a six-input symbolic logic device
- an inverter that has a history of failure