Quantcast
Figure 3-26. Ring counter: A. Logic diagram; B. Timing diagram.

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
 
3-28 then only one device may be HIGH at one time. As the clock, or input, signal is received, the specified state will shift to the next device at a rate of 1 shift per clock, or input, pulse. Figure 3-26, view A, shows a typical four-stage ring counter. This particular counter is composed of R-S FFs. J-K FFs may be used as well. Notice that the output of each AND gate is input to the R, or reset side, of the nearest FF and to the S, or set side, of the next FF. The Q output of each FF is applied to the B input of the AND gate that is connected to its own R input. Figure 3-26. —Ring counter: A. Logic diagram; B. Timing diagram. The circuit input may be normal CLK pulses or pulses from elsewhere in the equipment that would indicate some operation has been completed. Now, let’s look at the circuit operation and observe the signal flow as shown in figure 3-26, view B. For an initial condition, let’s assume that the output of FF1 is HIGH and that the input and FF2, FF3, and FF4 are LOW. Under these conditions, lamp A will be lit; and lamps B, C, and D will be extinguished. The HIGH from FF1 is also applied to the B input of AND gate 1. The first input pulse is applied to the A input of each of the AND gates. The B inputs to AND gates 2, 3, and 4 are LOW since the outputs of FF2, FF3, and FF4 are LOW. AND gate 1 now has HIGHs on both inputs and produces a HIGH output. This HIGH simultaneously resets FF1 and sets FF2. Lamp A then goes out, and lamp B goes on. We now have a HIGH on AND gate 2 at the B input. We also have a LOW on AND gate 1 at input B.


Electrical News
Bagels: Official Food of Test & Measurement
A bagel is the perfect food to eat at your...
eetimes.com
Max's BADASS Display, Part 3
Now we come to consider the various ways in which...
eetimes.com
Smartphones, 28nm Tech Drive TSMC 1Q Revenue
Thanks to demand for high-end smartphones and investment in technology...
eetimes.com
Quantenna Speeds Up WiFi
As several major companies roll out 802.11ac solutions with multi-user,...
eetimes.com
Samsung Patent Leaks Point to Google Glass Competitor
In a series of leaked patent documents from South Korea,...
eetimes.com
IMEC Adds Image Sensors to Commercial Development Service
The Belgian company has published a brochure that boasts of...
eetimes.com
Why iBeacon Is Important for You
It's true that iBeacon may help you find a restaurant...
eetimes.com
Sensors Combat Corrosion
The energy Piplines Cooperative Research Centre and Deakin University (Australia)...
eetimes.com
Power Week-in-Review: Wristband TE Generator & Solar Cell Efficiency Record
This week, a flexible band-shaped thermoelectric generator that can harvest...
eetimes.com
A Picture Is Worth 1000 Words - So Add One to Your Profile Already!
My personal preference is that I like to know who...
eetimes.com
NASA Tests Technologies for Deep Space Exploration
An oxygen recycling system, optical communications, and a deep space...
eetimes.com
DARPA Turning Drones Into WiFi Hotspots
The US military's research division is equipping aging drones used...
eetimes.com
ON Semi on a Roll With Image Sensors
Coupled with the company's acquisition of Truesense last week and...
eetimes.com
Wearable Computing Market on 78% CAGR Through 2018
By the end of 2014, shipments of wearable devices are...
eetimes.com
EEVblog Server Issues
The EEVblog dedicated server which hosts this site and the...
eevblog.com
EEVblog #604 – Sinclair C5 Restoration – Part 1
The obligatory “before” video showing Dave’s Sinclair C5 electric “car”...
eevblog.com
Samsung, Glofo Roll 14nm Process
Putting heat on TSMC, Samsung and Globalfoundries are putting a...
eetimes.com
The Big Fat Indian Election
Technology and data analysis have come to play a crucial...
eetimes.com
Are PCB Layout Designers an Endangered Species?
Are PCB layout designers as a group poised to fade...
eetimes.com
Motorola People, Products Remembered
As some of the last big chunks of Motorola going...
eetimes.com
   


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +