What is the lock out problem in synchronous counter?

Lock out : When the counter enters one of the unused states,then it will not come back from that states ,and counter is said to be locked out. a) MOD-3 : With 2FF we can have 4 states (0,1,2,3) , but here mod-3 implies 3 states say 0,1,2 if counter enters state 3 we cannot assure it will come back.

What is lockout problem?

Sometimes a counter may find itself in some unused states, this happen when if next state of some unused state is again some unused one and if by chance the counter happens to find itself in some unused state and never arrives at in used state then this condition is called “Lock Out”.

What is lockout and how it is avoided?

Lockout refers to the principle of shutting down an energy source correctly, draining any excess energy and applying devices to that energy source that prevent it from being energised. In simpler terms, a lockout device stops something from being switched on when it is absolutely essential that it remains switched off.

How the lockout condition is removed?

The lockout can be avoided by designing it’s state transition such as to give it’s next state from all of its unused state to (may be) initial state. This is said to be lock free arrangement.

What is data lockout?

The data lock-out flip-flop is similar to the pulse-triggered (master-slave) flip-flop except it has a dynamic clock input. The dynamic clock disables (locks out) the data inputs after the rising edge of the clock pulse. Therefore, the inputs do not need to be held constant while the clock pulse is HIGH.

What is synchronous binary counter?

Synchronous Counter: It is a digital circuit that performs counting in binary numbers with the help of flip-flops and all flip-flops triggered simultaneously.

What are the 6 steps of lock out/tag out?

Let’s look at each of these steps of LOTO safety more closely in the sections below.

1. Lockout/Tagout Step 1: Preparation.
2. Lockout/Tagout Step 2: Shut Down.
3. Lockout/Tagout Step 3: Isolation.
4. Lockout/Tagout Step 4: Lockout/Tagout.
5. Lockout/Tagout Step 5: Stored Energy Check.
6. Lockout/Tagout Step 6: Isolation Verification.

What is self correcting counter?

It consists of modifying the state diagram of a counter with the desired modulus until a single cycle is left. Due to the additional hardware required to change state transitions, the final circuit tends to be slow and large.

What is the working of synchronous counter?

In synchronous counter, the clock input across all the flip-flops use the same source and create the same clock signal at the same time. So, a counter which is using the same clock signal from the same source at the same time is called Synchronous counter.

What is counter explain synchronous and synchronous counter?

Synchronous counter is the one in which all the flip flops are clocked simultaneously with the similar clock input. On the contrary, an asynchronous counter is a device in which all the flip flops that constitute that counter are clocked with different input signals at different instants of time.

What are the 7 steps of Loto?

Think, plan, and check. If you are in charge, think through the entire procedure.

Communicate.

Neutralize all appropriate power at the source.

Lock out all power sources.

Tag out all power sources and machines.

Do a complete test.

Restart safely.

What is meant by “lock out” condition in a counter?

, former Student. Sometimes a counter may find itself in some unused states, this happen when if next state of some unused state is again some unused one and if by chance the counter happens to find itself in some unused state and never arrives at in used state then this condition is called “Lock Out”. Solution:

What are the disadvantages of using a synchronous counter?

Although there are many advantages, one major disadvantage of working with Synchronous counter is that it requires a lot of extra logic to perform. Digital clock or pulse generators.

How to avoid the lock out condition in the circuit?

An additional circuit is require to ensure that “lock out” does not occur. The counter should be designed using the next state to be initial state from the unused state. To avoid lock out condition the unused states are introduced in front of used states from the above state diagram the 1,4,5,6 and 7 is…

What happens when a clock counter is in invalid state?

When a counter is in working state, because of the noise spikes counter may find itself in some unused state (invalid state). Subsequent clock pulses may cause this counter to move from one unused state to other, resulting in counter never returning to the valid state. And the counter becomes useless.