This website uses cookies to ensure you have the best experience. Learn more

Flip Flops And Related Devices Essay

1566 words - 7 pages

Flip-Flops and Related Devices
Multiple Choice

1 . A "D" flip-flop utilizing a PGT clock is in the CLEAR state. Which of the following input actions will cause it to change states? [Hint]
CLK = NGT, D = 0
CLK = PGT, D = 0
CLOCK NGT, D = 1
CLOCK PGT, D = 1
Both a and c

2 . Which statement BEST describes the operation of a negative-edge-triggered D flip-flop? [Hint]
The logic level at the D input is transferred to Q on NGT of CLK.
The Q output is ALWAYS identical to the CLK input if the D input is HIGH.
The Q output is ALWAYS identical to the D input when CLK = PGT.
The Q output is ALWAYS identical to the D input.

3 . The ...view middle of the document...

Only one of the inputs can be high at a time.
The output complement follows the input when enabled.

9 . Edge-triggered flip-flops must have: [Hint]
very fast response times.
at least two inputs to handle rising and falling edges.
a pulse transition detector.
active-low inputs and complemented outputs.

10 . What is the significance of the J and K terminals on the J-K flip-flop? [Hint]
There is no known significance in their designations.
The J represents "jump," which is how the Q output reacts whenever the clock goes high and the J input is also high.
The letters represent the initials of Johnson and King, the co-inventors of the J-K flip-flop.
All of the other letters of the alphabet are already in use.

11 . If both inputs of an S-C flip-flop are low, what will happen when the clock goes high? [Hint]
An invalid state will exist.
No change will occur in the output.
The output will toggle.
The output will reset.

12 . Which of the following best describes the action of pulse-triggered FF's? [Hint]
The clock and the S-C inputs must be pulse shaped.
The data is entered on the leading edge of the clock, and transferred out on the trailing edge of the clock.
A pulse on the clock transfers data from input to output.
The synchronous inputs must be pulsed.

13 . Which of the following is a disadvantage of the S-C master-slave flip-flop? [Hint]
The outputs do not change when both inputs are low.
There is no complementary output.
Data can only be entered on the leading edge of the clock.
An invalid output state exists if both inputs are high.

14 . Which of the following is not generally associated with flip-flops? [Hint]
Hold time
Propagation delay time
Interval time
Set-up time

15 . The waveforms shown in Figure 5-1 are applied to a gated D latch, which is initially RESET. Which of the areas identified on the Q waveform is incorrect?

[Hint]
a
b
c
d

16 . What is another name for a one-shot? [Hint]
Monostable
Multivibrator
Bistable
Astable

17 . Given the waveforms for the S-C flip-flop in Figure 5-2, what is wrong with the circuit?
[Hint]
The Q output should be high at the beginning of the second clock pulse. The IC is defective.
When both C and S are high at the same time, the output is unpredictable. Nothing is wrong with the circuit.
The outputs should change on the trailing edge of the clock; the clock signal is inverted.
The outputs should have toggled on the leading edge of the second clock pulse; the IC is bad.

18 . A gated S-C latch and its associated waveforms are shown in Figure 5-3. What, if anything, is wrong and what could be causing the problem?
[Hint]
The output is always low; the circuit is defective.
The Q output should be the complement of the output; the S and R terminals are reversed....

Other Papers Like Flip-Flops and Related Devices

Why Shoes Are The Most Important Thing (To Me)

883 words - 4 pages safe sign. If there was a cute pair of ankle booties or riding boots sitting on the door mat, I would breathe a sigh of relief. They were most likely normal. But, if there was a pair of flip flops at the door, and not just any pair of flip flops. but those $2 rubber ones from Old Navy, I would cringe. And it’s not because $2 rubber flip flops from Old Navy should be reserved for the beach and the beach only. I don’t try to impose my style on

Basic Paper

733 words - 3 pages smartphone. I have found that a tablet and other mobile devices can also be used to view a flip book. If a small business owner is looking for an inexpensive marketing tool, then creating a flip book by using Yumpu.com will be an ideal solution. One of the best reasons to make your own flip book is to be environmentally friendly. A flip book uses no ink and will have consist of paper as it is basically an electronic file. This means they are

Perfect Shoes as a Solution

1356 words - 6 pages expected to have our feet covered in public. We cover our feet with clogs, stilettos, mules, pumps, flip flops, tennis shoes, boots, and sandals just to name a few. Just because our feet are covered doesn’t necessarily mean that what we put on our feet is really beneficial to the general health of our feet. The wrong size, fit or type of shoe can cause foot disorders and pain. You’ve heard the old expression “walk a mile in my shoes.” When it comes to

Demostrative Communication

900 words - 4 pages be considered the most important because which out notice the clothing that a person wearing sends out the first impression to other people. A great case in point would be when people go interview for a job. If the applicant is applying for a management, and the applicant shows up to the interview in flip-flops and torn pants, this look will imminently send the wrong message to the person who is interviewing the person. In addition, locomotion

Meeting a New Prospect

665 words - 3 pages Atlantic Ocean, locally known as the south west wind. Temperatures can go as high as 44 °C (111.2 °F) in some parts of Nigeria so please endeavour to take some cotton wears and some comfy flip flops. (Wikipedia, n.d.). Timing Time is of the essence when dealing with Nigerians. Time is so valuable to them most especially at meetings, church and school. Early notices should be passed on in case of an emergency or unforeseen circumstances failure

Statistics in Business

521 words - 3 pages compare old weather to current weather to predict the future weather. Another example would be how companies predict where to sale their products. Companies will use store information to such as hot area is where flip flops sale the most. The stock market is another example of using statistics. Stock analysts use statistical ratios to predict what the future of the economy can be. Summary In closing, statistics is one most important tools in

Experiment 8

1483 words - 6 pages speed at which an analog input is converted to the digital output depends on the speed of the CLK input. According to the ADC0804 datasheets, the typical operating frequency is approximately 640 kHz at 5 volts. Figures 13-3 and 13-4 show two ways of providing clock to the ADC0804. In Figure 13-4, notice that the clock in for the ADC0804 is coming from the crystal of the microcontroller. Since this frequency is too high, we use D flip-flops (74LS74

Medicare And Medicaid Events

3531 words - 15 pages limited to, shorts, Bermuda shorts (pants that are at or above the knee), skorts, tank tops, spaghetti straps, halter or tube tops, bathing suits, sundresses, bare-back dresses, sweat suits, wind suits, jogging suits or pants, jerseys, hats or caps at any time. Shirts must cover the midriff at all times (while sitting and when arms are extended). ♣ Casual (flip flops, shower, rubber, plastic, crocs, athletic) or beach sandals ♣ Distracting

Critical Thinking Questions

1176 words - 5 pages Critical Thinking Questions: Module 7 Chapter 3 Q:Select a recent mass media technology, for example, the iPad, and explain what you think its future will hold as it relates to the stages of technological innovation. A: The future seems very bright for devices such as the iPad and iPhones, and other Smartphone based devices. As the years continue to change so will the needs of the consumers of these technological devices, it is only a

India Biopsy Devices Industry Report 2015

543 words - 3 pages 12th Nov 2015, – Navi Mumbai, India: Market reports on India presents the latest report on “India Biopsy Devices Industry Report 2015”. The report provides a basic overview of the industry including definitions, classifications, applications and industry chain structure. The India Biopsy Devices Industry Report 2015 is a professional and in-depth study on the current state of the Biopsy Devices industry. The report provides a basic

Emharrison584

926 words - 4 pages heartbeat * anticoagulants – to prevent emboli from forming Premature ventricular contractions (PVC) * These dysrhythmias originate in the ventricles from an ectopic focus (a site other than the SA node) * The ventricles are irritable and fire prematurely, before the SA Node. The result is a widened strange looking QRS complex * Patient feels like there heart skipped a beat or flip flops * “ lub dub, dub, lub dub

Related Essays

Smartphone Essay

671 words - 3 pages cell (latch) • There are no “don’t care” inputs for a simple counter, which leads to more complicated logic. State transition table for 3-bit counter with D flip-flops The ‘present state’ and ‘next state’ columns are the same as for the JKs present state label 0 1 2 3 4 5 6 7 C 0 0 0 0 1 1 1 1 B 0 0 1 1 0 0 1 1 A 0 1 0 1 0 1 0 1 label 1 2 3 4 5 6 7 0 next state C 0 0 0 1 1 1 1 0 B 0 1 1 0 0 1 1 0 A 1 0 1 0 1 0 1 0 inputs needed DC 0 0 0 1 1 1

Digital Electronics Essay

652 words - 3 pages J-K Flip-Flop Basic R-S Flip-Flop Basic flip-flops are designed to ‘store’ a logic state. The simplest flip-flop is known as the R-S flip-flop, which consists of two NAND gate wired to give negative feedback and is shown in Figure 1. S NAND Q R NAND Q R-S Flip-Flop Figure 1 Simple NAND R-S Flip-Flop In normal operation the, with the reset (R) set to logic ‘0’ the output Q will follow the logic level applied to the set (S

Types Of Feet Essay

1025 words - 5 pages Ultimate Frisbee require footwear providing good lateral support for the frequent and quick change of direction. Lacing Different ways of lacing based on different situations can be seen at: www.aofas.org - search using “lacing.” Flip flops Wearing flip flops is very popular during warmer months. In most cases flip flops are not good for the feet. For someone with flat feet, flip flops provide no support. For someone with high arches, many flip flops have minimal cushioning. Prolonged standing or walking in flip flops will often, over time, cause the onset of pain in the feet, ankles, or further up the body.

All About Counter Essay

1107 words - 5 pages register-type circuits such as the flip-flop, and a wide variety of classifications exist: • Asynchronous (ripple) counter – changing state bits are used as clocks to subsequent state flip-flops • Synchronous counter – all state bits change under control of a single clock • Decade counter – counts through ten states per stage • Up/down counter – counts both up and down, under command of a control inputMontgomery • Ring counter – formed by a