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What is the problem in using a latch?
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Which problem of latch based designs can be solved using flip flops?
In flipflop-based high speed designs, maintaining clock skew is a big problem, but latches ease this problem. Hence use of flipflops can limit the design performance, in cases where the frequency of the design is limited by the slowest path.
What is the problem in timing analysis if you have latch in your design?
In flip-flop-based high-speed designs, maintaining clock skew is a problem, but latches ease this problem. In the design, slowest path decide the frequency of the design – means at which frequency design can work correctly. Latch based design are more susceptible from process variation.
What is the difference between a latch and a flip-flop?
Both latches and flip-flops are circuit elements whose output depends not only on the current inputs, but also on previous inputs and outputs. The difference between a latch and a flip-flop is that a latch does not have a clock signal, whereas a flip-flop always does.
What is the application of latch in VLSI design?
As one further note, latches are often used in a way that mimics the flip-flop behavior. This is done by pulsing the clock very quickly; just long enough for whatever data is at the input to show up at the output, and not much longer. In this configuration, they are called pulse latches, as described by IEEE
How is a latch used in a clock?
As one further note, latches are often used in a way that mimics the flip-flop behavior. This is done by pulsing the clock very quickly; just long enough for whatever data is at the input to show up at the output, and not much longer.
When do you need a latch bound circuit?
If you only have a single cycle, you need to use a latch-bound circuit. This is essentially spreading out the two latches which comprise the flip flop and stuffing logic in between, instead of on either side (and causes the delay from input to output to be one cycle).
What is the point of a flip flop latch?
To realize the point of a latch, consider that a flip flop is two back to back latches with opposite polarity clocks. This forms a lock-and-dam system which causes the output to change one cycle after the input (assuming setup and hold conditions are met). So, the in->out path of a flip flop ‘crosses’ the cycle boundary.