Flip-Flops and Timers Questions

• The truth table for an S-R flip-flop has how many VALID entries?
• One example of the use of an S-R flip-flop is as a(n):
• The 555 timer can be used in which of the following configurations?
• The equation for the output frequency of a 555 timer operating in the astable mode is: . What value of C1 will be required if R1 = 1 kΩ, R2 = 1 kΩ, and f = 1 kHz?
• What is one disadvantage of an S-R flip-flop?
• An astable multivibrator is a circuit that:
• What is another name for a one-shot?
• A basic S-R flip-flop can be constructed by cross-coupling which basic logic gates?
• If both inputs of an S-R NAND latch are LOW, what will happen to the output?
• What is the significance of the J and K terminals on the J-K flip-flop?
• Latches constructed with NOR and NAND gates tend to remain in the latched condition due to which configuration feature?
• Which of the following is correct for a gated D-type flip-flop?
• Which of the following describes the operation of a positive edge-triggered D-type flip-flop?
• When both inputs of a J-K flip-flop cycle, the output will:
• Multivibrators must be level-triggered.
• 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.
• Pulse-triggered flip-flops are identified by a bubble on the Q output terminal.
• Edge-triggered flip-flops can be identified by the triangle on the clock input.
• The 555 timer can be used in either the bistable mode or the monostable mode.
• A one-shot is a special type of multivibrator, which must be triggered to produce each output pulse.