Digital Design Questions

• Define a race condition for a flip-flop.
• Which of the following flip-flop timing parameters indicates the time it takes a Q output to respond to a Cp input?
• The main concern when using a pull-down resistor is:
• What is the major advantage of the J-K flip-flop over the S-R flip-flop?
• The ________ circuit overcomes the problem of switching caused by jitter on the inputs.
• The output of a standard TTL NAND gate is used to pull an LED indicator LOW. The LED is in series with a 470-Ω resistor. What is the current in the circuit when the LED is on?
• One example for the use of a Schmitt trigger is as a(n):
• When the inputs to a flip-flop are changing at the same time that the active trigger edge of the input clock is making its transition, this condition is called:
• A series RC circuit can be used to generate a power-up (automatic) reset signal.
• A Schmitt trigger has a positive feedback circuit and experiences a phenomenon called hysteresis.
• TTL requires a constant supply voltage of 8.0 V.
• Pull-up resistors and pull-down resistors are used to keep a floating terminal HIGH.
• The output of a phototransister is determined by the presence or absence of light at its base input.
• The term race condition describes the time that an active signal must be present at the input to a flip-flop before an active clock edge is applied.
• A transfer function graph illustrates the most important specifications for the Schmitt trigger devices.
• There is no way to eliminate the effects of a switch bounce.
• The 7805 will get very hot if your circuit draws more than 0.5 A.
• The input levels to a flip-flop must be maintained for a minimum time period both before and after the edge of the clock signal is applied.