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
Saddleback Sale - It's Happy Dance Time
The folks at Saddleback Leather are having a sale, and...
eetimes.com
7 Tricks for Estimating Battery Life Accurately
Here are seven tricks that -- if followed -- can...
eetimes.com
Spansion to Launch 3D-Embedded Automotive MCU
Spansion will launch a new microcontroller designed to offer high-performance...
eetimes.com
Intel Leads Non-iPad Tablet Processor Market
Intel, striving to get processor design wins in mobile devices,...
eetimes.com
FDA's Device Approvals Come Under Fire, Again
A recent study concludes that most medical devices cleared via...
eetimes.com
Wearables & IoT Boom Creates Supply Chain Challenges
Great ideas for new wearables or connected electronic devices can...
eetimes.com
ARM Extends Into IoT Software
ARM has announced plans for IoT device and cloud software...
eetimes.com
Oven Performance Shows Flip Side of Thermal Management
The standard, ubiquitous cooking oven is not only inefficient but...
eetimes.com
Tabula's DesignInsight Offers 100% Observability Into 3PLDs
It's not going too far to say that Tabula's DesignInsight...
eetimes.com
MediaTek May Narrow Qualcomm's Lead in China's 4G Market
MediaTek has a chance to narrow Qualcomm's lead in China's...
eetimes.com
EEVblog #669 – FLIR TG165 Thermal Imager Teardown
What’s inside the new FLIR TG165 Visual IR Thermometer /...
eevblog.com
Connected Car Takes Center Stage at CTIA
Reporting from Super Mobility Week, Steve Bell gives us insights...
eetimes.com
Microsoft Announces Windows 10
Microsoft execs emphasize the desktop UI, say Windows 10's final...
eetimes.com
Air Conditioner Falls From Window, Still Works
Sometimes, it's the mundane things in electrical and electronic devices...
eetimes.com
Air Conditioner Falls From Window, Still Works
Sometimes, it's the mundane things in electrical and electronic devices...
eetimes.com
Robots Confront Safety Standards
An emerging crop of industrial robots will be more user-friendly...
eetimes.com
Electronic Brain by 2023
Progress continues on fake brain to be used as test...
eetimes.com
Google, Silicon Labs Mesh for ZigBee-Like Protocol
Google's Nest-led Thread Group is meeting at its campus in...
eetimes.com
Bionic Ear Due Soon
STMicroelectronics collaborates with two companies on a bionic ear that...
eetimes.com
Peek Into BMW's Ultimate Driving Museum
BMW Welt and BMW Museum, located next to BMW headquarters...
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 +