Explain the working of asynchronous (ripple) counters, Electrical Engineering

Assignment Help:

Explain the Working of Asynchronous (Ripple) Counters?

An external clock is connected to the clock input of the first flip-flop (FF0) only. Thus FF0 changes state at the falling edge of each clock pulse but FF1 changes only when triggered by the falling edge of the Q output of FF0. For the reason that of the inherent propagation delay through a flip-flop the transition of the input clock pulse and a transition of the Q output of FF0 can never occur at exactly the same time. Consequently, the flip-flops cannot be triggered simultaneously producing an asynchronous operation.

A two-bit asynchronous counter

1544_Asynchronous (Ripple) Counters.png

Three-bit asynchronous binary counter

1705_Asynchronous (Ripple) Counters 2.png

The clock pulse fed in to FF0 is rippled by the other counters after propagation delays, like a ripple on water, hence the name Ripple Counter.
The 2-bit ripple counter circuit on top has four different states, every one corresponding to a count value. Likewise, the counter with n flip-flops can have 2 to the power n states. The number of states in a counter is recognized as its mod (modulo) number Therefore a 2-bit counter is a mod-4 counter.

A mod-n counter may as well describe as a divide-by-n counter. This is for the reason that the most significant flip-flop (the furthest flip-flop from the original clock pulse) produces one pulse for every n pulses at the clock input of the least significant flip-flop (the one triggers by the clock pulse).


Related Discussions:- Explain the working of asynchronous (ripple) counters

Operation of zener diode, Operation of Zener Diode The Zener diode's o...

Operation of Zener Diode The Zener diode's operation depends upon the heavy doping of its p-n junction permitting electrons to tunnel from the valence band of the p-type mater

Canonical sum-of-products form, Q. The truth table for F(A,B,C) = mi (2, 3,...

Q. The truth table for F(A,B,C) = mi (2, 3, 4 5) is as follows: (a) Express F in a canonical sum-of-products form. (b) Minimize F in an SOP form, and obtain a possible realiz

General equivalent circuits, What we have seen for practical power supplies...

What we have seen for practical power supplies applies to any  electrical circuit provided it contains only linear components

Find the quantum levels, A uniform quantizer is said to have 16 levels, and...

A uniform quantizer is said to have 16 levels, and hence is called a midriser. The saturation levels are to correspond to extreme values of the message of 1 V ≤  f(t) ≤ 17 V. Find

What do you understand by orthographic projection, What do you understand b...

What do you understand by orthographic projection ? Illustrate with the help of Matrix representation.

Memory address - address bus , Memory Address The memory  address is of...

Memory Address The memory  address is of 16  bits. It ranges from 0000?H to  FFFH 16bits address lines of 8085 microprocessor are  capable  of addressing 216 i e 65, 536, ( or

What is capacitor, What is Capacitor -  A capacitor is an electrical d...

What is Capacitor -  A capacitor is an electrical device that is used to kept electrical energy.   -  The unit of capacitance is Farad. The symbol of capacitance is C.

Feedback amplifier, Draw and explain the circuit of feedback amplifier

Draw and explain the circuit of feedback amplifier

Partial fraction expansion for z transformation, how should I calculate in...

how should I calculate inverse z transform of 1/0.729z^-1+0.729z+1.5314

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd