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55 Threads found on edaboard.com: Sensitivity Simulation
It is because you missed a load of variables from the sensitivity list of your always block, because it is asynchronous logic. You should be using always(*) for the block, as it will be updated also on adr_i, cache, ex_missed_dat_i. I highly suggest though that you add a clocjk to the system and make the design synchronous.
There are many details that make the first code non-synthesizable. It's e.g. not possible to implement counters in an asynchronous process. They can work in simulation because process elaboration is only triggered when an event in the sensitivity lists occurs. But sensitivity list are meaningless in hardware synthesis.
Quartus synthesizes the miso output register code because it can be rewritten as regular synchronous register description according to the template. Just pull-out rising_edge(clk). There are however many latches generated and missing sensitivity list entries will probably cause simulation to synthesis mismatch. Don't know why the design is wr
You can simulate the photocurrent by a simple parallel current source across the collecting junction; it's calibration that's the main problem here. Much of low-light sensitivity is about the "waste" terms - recombination, photons that overtravel the collection regions, fill factor and so on. You probably need to pull data or find data for respon
That's unfamiliar jargon to me. MC analysis simply assigns a different random adder / multiplier to things that are known to vary significantly, and you reap the simulation result for each put case so that you can perform statistical stuff on the data pile in the end. You could of course also perform more of a sensitivity analysis on a single e
The internal carry must be a variable, since a signal is only updated at the end of the process. That's a possible, but not necessary solution. The original code should simulate well with correct sensitivity list. It's not required that the carry through all bits in a combinatorial process is calculated in a single simulation cycle
Assuming you're only simulating it - somewhere appropriate in the process. In simulation, processes without a sensitivity list loop forever in 0 time. You need a wait statement to make it wait to move the time forward.
Well there is one fundamental bug in your code. The 2nd process has clock_50 in the sensitivity list, but actually uses clock_5 This means the process will not work at all in simulation! This is another important point - why do you have a generated clock? They are very bad practice on FPGAs, it can cause all sorts of timing problems - you should l
How you have made the VCO start-up when it's simulated standalone ?? PLL divider might be loaded your VCO excessively ? Have you ever tried your VCO functionality with different load conditions ?? Any MC simulation ?? Have you ever check the sensitivity of your VCO against load and reactive part of the load ???
This is a Pareto/sensitivity simulation the question : Which elements are dominant on the circuit performance. If you search a bit in Cadence help, you'll get the right information about that..
Dear all, I found some threads about this topic, but quite old. So I would like to put some questions about the simulation of the ISL. One post from 2005 says that ISF is obtained using transient functions. How do I do it ? Are these steps wrong ? 1 - Generate a transient analysis (let's say moderate/conservative) to have an output from
Suppose in sensitivity list of an always block a few signals are missing by mistake. Can it lead to inference of a latch? Regards
Can I have a sensitivity list for my always block as follows: wire clk; reg myVector; reg doStuff; always @(posedge doStuff or myVector) so that if any bits of myVector changes or if doStuff goes high the block executes.
right - problems with your code: 1. You shouldnt mix synchronous and async logic in the same process - its bad practice. 2. If you really wanted to mix the two, you are missing several signals in your sensitivity list, so simulation wont work properly (data But I suspect you really wanted the case statements inside the clocked part of the proces
Hi, I'm new in verification. Here's the problem I need some help. When two signals in the sensitivity list switching at the same time. It seems the simulator would still consider one switched after another. And if we have error detection in this block, sometimes it may trigger the error reporting without a real error. For example: always @(
sensitivity of hand wound Helix is extremely high vs Q of Coil.. USe a precision machinist to make a form within 0.1% of ideal. But you are talking simulation. Find a design that works What are your S parameters and design specs?
Hi In the yield analysis example, I am trying to plot YSENS measurement for capacitor and dielectric, but nothing comes up irrespective of whether I select Histogram or rectangular to be the type of the graph. The simulation runs, but nothing appears on the graph. How do I plot these component sensitivity histograms ? The project is a simple
what is in_sourceRA1? Is the stimulated by your testbench, if not, there's your problem. When you run simulation, look at your internal signals (e.g., out_sourceRA1) and you should be able to find out where you're losing data. Also, the "all" in your sensitivity list may not be supported by your simulator.
With Monte Carlo you might have to run 30-100 simulations before you got a good estimate of the standard deviation (SD) due to random mismatch. On the other hand, DC match is a sensitivity analysis that is much like a noise analysis. It will give you the SD in a single simulation, making it very useful for large circuits. The downside is (...)
this may help you 4.3.7. .SENS: DC or Small-Signal AC sensitivity Analysis "sensitivity Analysis (DC or Small Signal AC)" SPICE simulation and Control Statements - Developer Zone - National Instruments