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17 Threads found on Victim Aggressor
I suggest to sketch an equivalent circuit. You have: 1. the aggressor, which can be modeled as a voltage step with specific dv/dt. 2. a crosstalk capacitance C 3. the victim net, which can be modeled as a voltage source with output impedance R. You get a glitch magnitude which is roughly dV/dt * C * R (for glitch magnitudes small compared t
When two wire segment are in close proximity, they interact with each other electrically, this is an account of coupling capacitor between these two nets. This phenomenon is called crosstalk. or you can say, victim net gets affected by aggressor net. To avoid cross talk, you can insert buffer in victim net to increase strength, use double (...)
hi all , I came to know that during PT SI crosstalk analysis calculation , The first step is to consider infinite arrival window to nets , i.e nets can switch any time . I have few doubts 1) Is this infinite arrival window considered for aggressor/victim or both ? 2) Why is it done ? 3) wont it make calculation more pessimistic ? Please
Hi, I know we can upsize the victim net so that coupling is reduced. If by upsizing say the victim becomes the agressor ? My Question is what is the best method to deal with crosstalk in this scenario ? Note: There is no space to shield the aggressor net. It would be great if u could elaborate and provide some good materials (...)
Hi, While doing STA with OCV and xtalk ON, using PrimeTime SI, is there any way by means of which I can control timing windows. Basically what I am asking is, when we turn ON both OCV and Xtalk we usually see lot of timing violations (because of pessimism introduced). To remove pessimism we can apply some filters like filtering
TWF contains timing window & slew data . Tools find the earliest & latest arrival times for each victim net & aggressor net.The range of switching times from earliest to latest arrival,defines a timing window for victim net & defines another timing timing window for aggressor net.Crosstal effects occur when (...)
Hi, iwpia50s is correct. All of you know that the victim is the weaker net then your aggressor. So if you insert the buffer in the victim net your victim net will become little stronger, then you know..... Prithivi.
which book is good for info on Fanout (wire loading, delay modeling, Fanout threshold,) drivers, victim / aggressor(Dominant aggressor, aggressor / driver, P:N widths) Wire Capacitance(Model Capacitors ) , Keeper Circuits, Power P Chains, Interconnect, etc.., in a single book.
If the aggressor and victim are moving in the same direction, the victim net switches faster. This may lead to hold violation. There will be a setup violation if both the aggressor and viction are switching in different direction. (In this case, there is a crosstalk induced delay as the victim net (...)
Nets switching at high frequency (Ex: clock nets, High freq data nets) (aggressors) affect the nets adjacent to it (victim). This is due to the coupling capacitance between the two nets.
In asic terminology .. cross talk between aggressor net and victim net causes Glitch and some delay is also induced hence to avoid glitch ..double spacing is maintained for clock net Shiv
Glitches on a victim net are caused by switching of nearby aggressor net(s) and the coupling capacitance between vitim and aggressors. This can lead to incorrect data to be captured by a flop and thus a functional error. Delay noise is similar but the victim net is also switching. This can cause the (...)
SI can effect the delay throught a net by either increasing its delay (effecting setup time) or decreasing its delay (effecting hold time). Imagine a net with a weak driver (victim net) surrounded by nets with stronger drivers (aggressor nets). If all the nets switch from low to high around the same time, the aggressor nets can help pull (...)
hello, In an affected net, what will u work on first , aggressor or victim?????????????? pls reply soon thanks, Prasad
Above high noise: When the victim net is static high and the aggressor net switches from 0 to 1, there will be a noise bump in the victim net. The magnituge of this voltage bump will be greater than VDD. Below low noise: This occurs when the victim net is static low and the aggressor net switches from (...)
eda software , such as signal storm, can report victim net and aggressor net. you first set up a threshold of coupled capacitance, then fix victim net by upsizing cell or double spacing , or routing in different layer.
It is important to use a Pulse witha rise time the same as or close to what your circuit will see, of course 1 aggressor 1 victim measurement will not show you what to expect witha large number of signals switching simultaneously or close to simultaneous, however, you may find in this situation the return path may be the main crosstalk generating o