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(a) First draw Q for a gated D latch. (b) Now draw in the internal signals S and R from Figure 11-14. And confirm that S and R give the same value for Q as in (a). D G Q S R

(a) First draw Q for a gated D latch. (b) Now draw in the internal signals S and R from Figure 11-14. And confirm that S and R give the same value for Q as in (a). D G Q S R

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Complete the following timing diagrams for a gated D latch. Assume Q
begins at 0.
(a) First draw Q for a gated D latch.
(b) Now draw in the internal signals S and R from Figure 11-14. And confirm that
S and R give the same value for Q as in (a). 

### Gated D Latch Timing Diagram #### Instructions: (a) **Objective:** First, draw the output signal Q for a gated D latch based on the given D and G signals. (b) **Objective:** Next, draw the internal signals S and R from a referenced figure (Figure 11-14), ensuring that S and R produce the same output, Q, as in part (a). #### Diagram Analysis: - **Signal D:** - The signal starts low, goes high, then alternates between low and high. - These changes reflect the data input for the D latch. - **Signal G (Gate):** - This is the control signal for the latch, alternating between high and low. - When G is high, it allows the D input to pass through to Q. - When G is low, the latch holds its current state. - **Signal Q:** - Begins low (not shown in detail in the image). - Should be drawn to reflect changes in D when G is high. - Holds its state when G is low. - **Signals S and R:** - These are the set and reset signals derived from the D and G inputs. - S and R should be drawn to maintain the output Q consistent with the behavior described for a gated D latch. #### Drawing Q: - When G is high, Q follows D. - When G is low, Q maintains its last state. Use these rules to draw the output Q on the timing diagram, ensuring it reflects the logical operation of the gated D latch. Then, similarly adjust and confirm S and R.
Transcribed Image Text:### Gated D Latch Timing Diagram #### Instructions: (a) **Objective:** First, draw the output signal Q for a gated D latch based on the given D and G signals. (b) **Objective:** Next, draw the internal signals S and R from a referenced figure (Figure 11-14), ensuring that S and R produce the same output, Q, as in part (a). #### Diagram Analysis: - **Signal D:** - The signal starts low, goes high, then alternates between low and high. - These changes reflect the data input for the D latch. - **Signal G (Gate):** - This is the control signal for the latch, alternating between high and low. - When G is high, it allows the D input to pass through to Q. - When G is low, the latch holds its current state. - **Signal Q:** - Begins low (not shown in detail in the image). - Should be drawn to reflect changes in D when G is high. - Holds its state when G is low. - **Signals S and R:** - These are the set and reset signals derived from the D and G inputs. - S and R should be drawn to maintain the output Q consistent with the behavior described for a gated D latch. #### Drawing Q: - When G is high, Q follows D. - When G is low, Q maintains its last state. Use these rules to draw the output Q on the timing diagram, ensuring it reflects the logical operation of the gated D latch. Then, similarly adjust and confirm S and R.
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