Which of the following is an example of a synchronous counter?a.Ripple counterb.Johnson counterc.Ring counterd.Up/Down counter

Understanding Synchronous Counters

To classify the given options, it is essential to understand the types of counters:

1. Ripple Counter: It is an asynchronous counter where the flip-flops are triggered by the preceding flip-flop's output.
2. Johnson Counter: A type of ring counter where the inverted output of the last flip-flop is fed back to the first.
3. Ring Counter: This is also an asynchronous counter but has a single high bit that moves in a circular fashion.
4. Up/Down Counter: This is a synchronous counter that can count up or down based on the input control signals.

Analysis of Options

• Option A: Ripple Counter - Asynchronous
• Option B: Johnson Counter - Asynchronous
• Option C: Ring Counter - Asynchronous
• Option D: Up/Down Counter - Synchronous

Final Answer

The example of a synchronous counter from the options provided is d. Up/Down counter.