Electronics-Flip-Flops and Timers
Electronics-Flip-Flops and Timers
11. Which of the following describes the operation of a positive edge-triggered D-type flip-flop?
- If both inputs are HIGH, the output will toggle.
- The output will follow the input on the leading edge of the clock.
- When both inputs are LOW, an invalid state exists.
- The input is toggled into the flip-flop on the leading edge of the clock and is passed to the output on the trailing edge of the clock.
12. What is one disadvantage of an S-R flip-flop?
- It has no Enable input.
- It has a RACE condition.
- It has no clock input.
- It has only a single output.
13. Edge-triggered flip-flops can be identified by the triangle on the clock input.
- TRUE
- FALSE
14. The 555 timer can be used in either the bistable mode or the monostable mode.
- TRUE
- FALSE
16. Pulse-triggered flip-flops are identified by a bubble on the Q output terminal.
- TRUE
- FALSE
17. A one-shot is a special type of multivibrator, which must be triggered to produce each output pulse.
- TRUE
- FALSE
18. A D-type flip-flop is constructed by connecting an inverter between the Set and Clock terminals.
- TRUE
- FALSE
19. When using master-slave flip-flops, the data is entered into the flip-flop on the leading edge of the clock, but the output does not change until the trailing edge of the clock.
- TRUE
- FALSE
20. Electricity may be generated by a wire:
- carrying current
- wrapped as a coil
- that has neutral domains
- passing through a flux field