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Figure 4G.—Standard symbol circuit.
WHEN ANSWERING QUESTIONS 4-43
THROUGH 4-46, REFER TO FIGURE 4G.
FOR EACH QUESTION, ASSUME THAT
ALL FFs ARE INITIALLY RESET.
4-43. What type of circuit is shown?
1. J-K flip-flops
2. Clock
3. Shift register
4. Ripple counter
4-44. Assume all lamps are out. After 16 input
pulses, which two lamps will be lit?
1. A and B
2. A and C
3. B and C
4. B and D
4-45. Assume all lamps are out. After 16 input
pulses, which lamps, if any, will be lit?
1. A, B, C, and D
2. B, C, and D
3. A, B, and D
4. None
4-46. What is the main disadvantage of using
this circuit with a high frequency input?
1. The circuit will burn up
2. Possible errors in the output
3. The flip-flops will act as T flip-flops
4. Above a certain frequency the
circuit will count in the opposite
direction
