COM207 – DIGITAL ELECTRONICS
TUTORIAL #5
1. If a RS latch has a 1 on the S input and a 0 on the R input, determine the correct state
for output, Q when S goes to 1.
2. Identify the correct inputs for S and R when the output of the SR latch is invalid.
Assume active HIGH inputs.
3. How would you modify the SR latch so that the invalid state does not occur anymore?
4. When will the output Q be equal to the D-input for the gated D-latch?
5. Identify one main difference between the JK and SR flip flops.
6. Identify the correct output for the following inputs of the JK flip flop. Assume active
HIGH inputs.
a. J=1, K=0
b. J=1, K=1
c. J=0, K=0
d. J=0, K=1
7. Determine the correct waveform at the output Q.