A race condition occurs when the output of a logic circuit is fed back into the input in such a way as to change the output, such that settling of the inputs delays the final stabilization of the outputs. It can also occur when two inputs to a circuit change at the same relative time, but the result depends on time sequence, such as in a D-FlipFlop where the clock is edge triggered.. In a full adder, for instance, propogation of carries can delay the final output, resulting in performance (speed) degradation. That is why many full adders have look-ahead carry logic. In essence, to avoid a race condition, you want to design the circuit so that propagation delay does not accumulate in series. A striking example in my memory was where an 8085 microprocessor system used WR/ to drive the databus drivers, while at the same time using WR/ to strobe the destination latches. That was a race condition, and it made the final contents of the latches indeterminant.
A race condition in any logic circuit is where two inputs change at about the same time, making the output indeterminate.
That said, a race condition in an S-R flip flop is where both of the S and R inputs go false at the same time. As a result, the output is indeterminate.
In order to avoid race conditions, you need to ensure that all setup and hold times are maintained as designed by the particular device, and that you include adequate design for transmission line effects, i.e. capacitance and inductance versus resistance.
well we know that in a JK flip-flop the outputs are again fed back to the inputs.Now, let us consider a situation that for J=K=1 the previous state(Q1) of flip-flop get toggled (inverted) giving next state(Q2=Q1'). let us assume that the value of the clock - pulse didn't change even after the state conversion, this means the flip - flop is still in ON mode for the same values of J and K , so the flip-flop again toggles the present state i.e. Q2 gets toggled , now Q3=Q2'=Q1 . This process continues over and over till the clock pulse changes . This continuous undesirable transitions of outputs for the same clock-pulse is called race-around condition.
steps to avoid :-1. to avoid this condition the time period of the clock pulses must be less than the propagation delay through the flip-flop.
sole dependence of propagation delay should be avoided as it is difficult to control it to obtain the above condition the flip-flop must be provided with some external mechanism or circuit that adds extra delay.
2. An even better approach is to design circuitry that makes the flip-flop sensitive to clock-pulse transition instead of clock-pulse duration .This idea brings the concept of edge-triggered flip-flops.
In Race round condition gate operation delay by signal but gate oprate first with clock ,this condition called the race raund confident
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RACE AROUND CONDITION OCCURS WHWN BOTH THE INPUT ARE HIGHAND THE OUTPUT THUS UNDERGOES A TRANSITION STATE.FOR EXAMPLE CONSIDER THE INPUT VALUES IN A JK FLIP FLOP;ie;J=K=1 ,THE OUTPUT Q0=0 IN NORMAL CASE WILL CHANGE TO 1 AND VICE VERSA. THE REMEDY FOR RACE AROUND PROBLEM CAN BE ELIMINATED BY USING A MASTER SLAVE J-K FLIP FLOP'S
In a master-slave flip-flip arrangement, the master flip-flop determines its state on one clock edge, while the slave flip-flop determines its state on the following clock edge. This way, the end-to-end output does not ever change on any one clock edge, so no race condition is possible.
consists of two r-s flip-flops wherein clock of the first is negated and applied to the second.it is used to avoid the problem of race-around condition by making sure that the first flip-flop is triggered during the positive going edge and the second during the negative edge of the clock pulse.
absolutely not.
In Race round condition gate operation delay by signal but gate oprate first with clock ,this condition called the race raund confident
Any race because it is a skin condition
No
No because guys do more sports and where shoes more then flipflops. girls also have sports but flipflops narrow it down to a no haha. :D
one bit storge element for flipflop
I should hope so!
Flipflops are generaly worn by ladies and if a male was to wear flipflops then he would be considered homosexual. They were invented by the french so that is why the gay community go ballistic over these particular type of footwear. They are extremely confortable and many varites exits in diffrent colours sizes and shapes the majority of flipflops are worn at the beach and at summertime. The usual cost of a flipflop (singular) is £2 but together £5. The cost of a flipflop (singular) can be greatly reduced if manafactured in a sweatshop.
two or more processes are reading or writing some shared data and the final result depends on who runs precisely when, are called race condition.
toggle condition :- the condition of the flip-flop in which on the application of clock-pulse inverts the present state Q(t+1) = Q'(t) on the application of clock-pulse for JK-flip-flop the toggle condition is J=K=1 for JK flip-flop this is called toggle condition condition
The "Race Around Condition" occurs when J+K=1 i.e. When the FF is in the toggle mode.the race around condition in JK latch can be avoided by:a) Using the edge triggered JK flip flop.b) Using the master slave JK flip flop.
Don't have to. There are ff's with only one output.