5. Below is the diagram for an S-R Latch using NAND gates. Assume the NAND gates...
Below is the diagram for an S-R Latch using NAND gates. Assume the NAND gates each have 15 nS propagation delay. The system starts with the conditions -S is HIGH, R is HIGH, Q is LOW, and Q is HIGH state, and has been stable in that state for a significantly long time. Now, at some time to, we bring the “S input to the zero state. How long before NOT Q is valid (in a final stable state)? S...
10.5 This refers to the S' input for the NAND version, i.e., you don't have to include an inverter for S. 10.8 Start with Q = 0, Q = 1. Hint: be sure to remember what you observed in the previous problem! 10.5 → Would you expect the propagation delay from the set input to the Q output to be faster in a set-reset latch built from a pair of NAND gates or one built from a pair of NOR...
For an S-R latch (with NAND gates), what is the next state of Q' if S=0 and R=1? A. Q(t+1)=1 B. No change C. Q(t+1)=0 D. Forbidden
Implement an S-R latch using NOR gates instead of NAND. Which are the outputs for the four possible input scenarios?
a) Draw an SR-latch using only NAND gates. Label each input and output, and label all wires with a name if the wire does not connect to any input or output b) Describe the behavior of the latch when S and R are both 0. What is the output of each gate? c) Assuming that the latch starts with S = R = 0, write down the sequence of what happens when R = 1. Discuss changes at each point...
a) (5 marks) Explain the difference between a latch, a gated latch and a flip flop. b) (5 marks) A gated SR latch has the following schematic diagram CLK a) Draw a timing diagram showing the Q and Q outputs for the following sequence of inputs: CLK R Assume that the initial state of the outputs is Q 0 and Q 1 c) (5 marks) Draw a schematic diagram for a rising edge-triggered master-slave D flip- flop built using two...
Illustrate differences between an active-HIGH input S-R latch and an active-LOW input 5 - Ē latch with the aid of logic diagram, truth table, and statements (comments)
Answers are at the end of the chapter 1. If an S-R latch has a 1 on the S input and a 0 on the R input and then the S input goes to 0, the latch will be (a) set (b) reset (c) invalid (d) clear 2. The invalid state of an S-R latch occurs when (c) S 1,R-1 (d) S-0, R-O 3. For a gated D latch, the output always equals the D input (a) before the enable...
1. If the waveforms in Figure 7-72 are applied to an active-LOW input S-R latch, draw the re sulting Q output waveform in relation to the inputs. Assume that Q starts LOW
1. a) Complete the waveform templates for the Master –Slave D-flip-flop below with given D, CLK, CLEAR, and PRESET signals. Neglect the propagation delays. b) Does it have positive or negative edge triggering with respect to CLK? c) Are the asynchronous PRESET and CLEAR active-high or active-low? 2. Enabling of data load in the D-flip-flop was implemented with a 2-to-1 multiplexer as show below. The D-flip-flop has the positive edge triggering and the active-low asynchronous clear. a) Is the Enable...