Topic 6: Counters

What is the MOD number of a 8-bit ripple counter?

• 256

• 512

• 128

• 64

What is the max count of a 10 bit counter?

• 1023

• 1024

• 100

• 99

What is the correct sequence of a decade up counter?

• 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

• 1, 2, 3, 4, 5, 6, 7, 8, 9

• 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

• 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

How many FFs are required to build a counter that will count from 0 to 88?

• 6

• 7

• 8

• 9

Refer to the figure, what is the output frequency at X?

• 266.67 Hz

• 100 Hz

• 266.67 kHz

• 100 kHz

A counter counts up to 6. What is the output frequency if the input frequency is 42kHz.

• 600 Hz

• 700 Hz

• 6000 Hz

• 7000 Hz

Refer to the figure, what is the max count of the counter?

• 15

• 14

• 13

• 12

Figure 1 shows a/an

• Asynchronous down-counter

• Synchronous down-counter

• Asynchronous up-counter

• Synchronous up-counter

The figure shows a 74293 counter. What is the max count of this counter if Q0 is connected to MR1 and Q3 is connected to MR2?

• 7

• 8

• 9

• 10

What is the main advantage of synchronous counters over asynchronous counters?

• Simpler circuitry

• Higher input frequency operation

• Lower power consumption

• Faster response time