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Why does a d-type flip flop need a transition gate on its clock input?
Wiki User
∙ 11y ago
The D Flip-Flop takes the logic level of 'Data' to the output only on the rising edge of the clock pulse.
Without the transition gate: Since the clock pulse is a square wave (and is high for half a cycle, and low for the other half), the logic level at 'Data' could change while the clock pulse is high, causing the output to change before the next rising edge. This is not how a flip-flop operates.
The transition gate prevents this by converting the clock pulse into a very short 'blip' of a few nanoseconds, starting at the rising edge of the clock pulse, repeating on the next cycle. This means there is only a very small window where the clock is high, and the logic level at 'Data' can be taken to the output.
Wiki User
∙ 11y ago
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What is the difference between a flip-flop and a latch?
flip flop:-> it work's on the basis of clock pulses.-> it is a edge trigerred , it mean that the output and the next state input changes when there is a change in clock pulse whether it may a +ve or -ve clock pulse.latch;-> it is based on enable function input-> it is a level trigerred , it mean that the output of present state and input of the next state depends on the level that is binary input 1 or 0.Both the flip-flop and latch are Sequential circuits....Flip flops are edge-triggered devices whereas latches are level triggered devices.latch does not have clock signal whereas flip flop does.Flip flop has two values while latch has only one value.A: A flip-flop can be set reset and pass date with a clock a latch is a two state switch of or onA flip flop will follow a clock a latch will remain status quo until it is unlatch. basically one does not use flip flop for latches and viceversa. both can be flip and latched by signals.
What is the main difference between normal JK flip flop and master slave JK flip flop?
A normal JK flip-flop has the output change state based on the input on the leading edge of clock, while the master-slave variety predetermines the output on the leading edge of clock and then effects the actual change of the trailing edge of clock, making it impervious to race conditions.
What are the disadvantages of asynchronous counter?
Counter circuits made from cascaded J-K flip-flops where each clock input receives its pulses from the output of the previous flip-flop invariably exhibit a ripple effect, where false output counts are generated between some steps of the count sequence. These types of counter circuits are called asynchronous counters, or ripple counters.
Why a parallel counter is capable of faster operation than a ripple counter?
The parallel counter incorporates carry lookahead circuits so that all flip-flops in the counter change in sync with the clock pulse. The ripple counter each flip-flop output is the clock for the next flip-flop, causing the most significant bit of the counter to settle only after a long delay time from the input clock pulse.
What is an advantage of the J-K flip-flop over the S-R type flip-flop?
no indeterminate state
What is countering?
A counter is a sequencial circuit with a set of flip flop which counts the number of pulses given at the clock input A counter is a sequencial circuit with a set of flip flop which counts the number of pulses given at the clock input
How a ripple counter works?
Clock is propagated from one T or JK flip flop to another hence it works. A ripple counter works by the following principle. A clock pulse is applied to the first flip flop and the output of the first flip flop acts as the clock input to the second flip flop and the sequence continues in that order.
What is the difference between a transparent flip flop and a master slave flip flop?
I never heard of transparent flip flop and i think it refers to a 'd' flip flop where the output will follows the input with the clock. a master slave referred as j-k do not follow the input not until the master tells the slave to flip
What is the difference between a flip-flop and a latch?
flip flop:-> it work's on the basis of clock pulses.-> it is a edge trigerred , it mean that the output and the next state input changes when there is a change in clock pulse whether it may a +ve or -ve clock pulse.latch;-> it is based on enable function input-> it is a level trigerred , it mean that the output of present state and input of the next state depends on the level that is binary input 1 or 0.Both the flip-flop and latch are Sequential circuits....Flip flops are edge-triggered devices whereas latches are level triggered devices.latch does not have clock signal whereas flip flop does.Flip flop has two values while latch has only one value.A: A flip-flop can be set reset and pass date with a clock a latch is a two state switch of or onA flip flop will follow a clock a latch will remain status quo until it is unlatch. basically one does not use flip flop for latches and viceversa. both can be flip and latched by signals.
What is d flip flop?
The D flip-flop has a D and Clock input, and a Q (and sometimes Q/) output. The D input is copied to the Q (and, inverted, Q/) output on the specified edge of Clock.Its like a J-K flip-flop where K is driven with the inverted value of J.ANSWER: D stands for data it it will transfer the data with a clock control inputd type flip flop is a flip flop whose output is a function of the input which appeared one pulse earlier. Also known a d type flip flop.
How do you convert SR flip flop into edge triggered flip flop with preset and clear input?
An SR flip-flop can be converted into an edge triggered flip-flop with preset and clear inputs by adding the clock and the asynchronous inputs.
What is race problem?
Race-around condition is arises in level triggered JK flip flop . when you apply 1 to both j and k input than the flip flop will toggle on every clock or it may toggle multiple times in the same clock pulse . it may be possible that new output will feedback to input before clock goes to zero (for positive edge triggered) if it happens than the flip flop will toggle on time again . this undesired toggling is called Race-around condition. overcome by - using edge triggered flip flop. using very narrow clock width.
In a J-K flip flop the function K equal to J is used to realize what?
T Flip - Flop.Toggle Flip - Flop.There will be only two conditions.#When T=0(J = K = 0 ) a clock transition don't change the state of the filp - flop.#When T=1(J = K = 1 ) a clock transition complements the state of the flip - flop.Characteristic table._ ___________________________|T|Q(n+1)|_|___________________________||0|Q(n)No Change|_|___________________________||1|Q'(n)Complement|_|___________________________|
What is the Use of clock in flip flops?
The primary use of a clock in flip flops is to provide the trigger pulse to the flip flop
What are Rising edge triggered d type flip flops?
The D flip-flop has a D and Clock input, and a Q (and sometimes Q/) output. The D input is copied to the Q (and, inverted, Q/) output on the specified edge of Clock.Its like a J-K flip-flop where K is driven with the inverted value of J.ANSWER: D stands for data it it will transfer the data with a clock control inputd type flip flop is a flip flop whose output is a function of the input which appeared one pulse earlier. Also known a d type flip flop.
Which flip-flop timing parameter defines the time required between data input steady and a clock edge?
set up time
What is the main difference between normal JK flip flop and master slave JK flip flop?
A normal JK flip-flop has the output change state based on the input on the leading edge of clock, while the master-slave variety predetermines the output on the leading edge of clock and then effects the actual change of the trailing edge of clock, making it impervious to race conditions.
