Hello, friends welcome to the new post. In this post, we will cover Difference Between Synchronous & Asynchronous Counter. In the field of digital electronics, the counter is a logic circuitry that is created through the use of flip flops connected in series combinations. It is used to count of quantity of operations of input terminology of negative and positive corner variants. There are common applications for synchronization and frequency calculation.
There some features is like the registers since these two modules are consist of flip-flops. There are 2 main types of counters first one is synchronous and the second one is asynchronous counters. The basic difference is that in a synchronous counter, all flip flops get triggered through the use of a single clock and in an asynchronous counter there is different clocks are used.
So let’s get started.
Difference Between Synchronous & Asynchronous Counter
Asynchronous Counter
- The asynchronous counter also named as ripple counter. In this configuration, the output of flip flop runs the other flip flop.
- It is the packaging configuration of flip flops where the output of a single flip flop operates the clock output of flip flop.
- The ripple counter comprises of a sequence of flip-flops here the output of every flip-flop is linked to the clock input of the subsequent flip flop.
- The signal is given to the ist flip flop and then moves to the next having a time delay.
- For example, the output of the ist flip flop is the clock input of the 2nd flip flop, and the output of 2nd flip flop is the signal input of the 3rd flip flop.
- Its commonly used type is four-bit up counter, four it down counter, and four-bit up/down counter
Synchronous Counter
- This type of counter is also called a parallel counter in this counter the flip flops are configured so that their condition of them vary at a similar time according to the input signal.
- If the pulse given is such that every flip-flop in the counter gets triggered through a single pulse due to it is known as a synchronous counter.
- Contrary to the asynchronous counter the counter input is linked to the inputs of every flip flop. Since every flip flop gets a pulse at a single time due to that cause these counters can operate at a higher speed than the asynchronous counter.
What is Synchronous Counter
- It is also named as a synchronous counter.
- Its configuration is that in this module all flip-flops get triggered with a similar clock pulse.
- Its design is somewhat complicated.
- The sequence for this module is fixed.
- In this arrangement, there is no fault due to the decoding.
- Its functioning speed is higher than other counters.
- According to the clock signal, every flip flops its state at the same time.
- It employed in clocks
What is Asyncrhnous Counter
- It is named a serial counter.
- In this module, there is a separate pulse needed for each flip-flop.
- Its practical use is frequency divider circuits
- There is a decoding fault that exists in this device.
- its functioning speed is less than other devices.
- Its flip-flop does not vary in condition according to the resultant pulse.
Synchronous Counter vs Asynchronous Counter
Synchronous Counter
- For synchronous counter, a universal clock is used which is common for flip flops.
- It has a higher speed function than the asynchronous counter.
- It does not produce decoding errors.
- It is known as a parallel counter.
- It’s difficult to use since has different conditions.
- It can work in any required count sequence.
- Basic examples are the Ring counter, Johnson counter
- It has less propagation delay
Asynchronous Counter
- In this counter main clock is given to the first flip flop and then the other flip flops get the output of the previous one.
- It is slower to speed than the synchronous counter.
- It produces a decoding error
- It is known as a serial counter.
- It can be easy to make and apply.
- It works on fixed count sequence
Why is synchronous better than asynchronous?
- Asynchronous programming best best for performing CPU functions but not most work. Synchronous programming is better for working simply and operates in sequentially.
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